Anna-Lena Kjøniksen

• Tellnes, Lars Gunnar Furelid; Svanes, Erik; Pamies, Ramon Francisco Porras & Kjøniksen, Anna-Lena (2026). Environmental sustainability of protein rich food from tunicates. Case study on Ciona aquaculture in Europe. Future Foods. 14. doi: 10.1016/j.fufo.2026.101133. Full text in Research Archive
• Biedacha, Maciej; Tellnes, Lars G. F. & Kjøniksen, Anna-Lena (2025). Mapping Recent Developments in Bio-Based Insulation Materials: A review of trends and environmental impacts. IOP Conference Series: Earth and Environmental Science (EES). ISSN 1755-1307. 1568(1). doi: 10.1088/1755-1315/1568/1/012020. Full text in Research Archive Show summary

  Abstract European legislation continuously increases requirements for carbon footprint accounting for buildings. The energy efficiency and embodied carbon of buildings are regulated through the energy efficiency directive with targets for 2030. While construction production regulation makes it mandatory to disclose carbon footprints of key materials such as insulation by 2027. Improving building products to lower their embodied CO2 emissions and to include additional carbon storage capabilities is seen as one of the most promising ways to mitigate the climate impact of the construction sector. Technological advancements and increased use of bio-based materials are vital. However, strategies to prolong the lifespan and maximize effective carbon storage of these materials are equally important. This paper aims to explore trends in the development of new bio-based materials (with focus on insulation materials) as alternatives to existing building materials supporting the global shift towards carbon neutrality. The study objectives are to investigate and map the main areas and types of new bio-based building materials, with equal interest in strategies for reuse and recycling to extend stored carbon and reduce emissions. The results show that bio-based material could have additional benefits of energy storage, carbon sink and recycling at end-of-life. However, most assessments of these materials focus on a narrow cradle-to-gate scope and thermal conductivity as only insulation material property. Hence, to further advance on bio-based insulation materials, there is a need for further development and harmonization of life cycle assessment methods that include these aspects and can be implemented in standards and regulations.

• Tellnes, Lars G. F.; Amasawa, Eri; Kishita, Yusuke; Pamies, Ramón & Kjøniksen, Anna-Lena (2025). Life-cycle climate change and resource use decoupling indicators for product-service systems: Case study on rental business model. Journal of Cleaner Production. ISSN 0959-6526. 525, p. 146623–146623. doi: 10.1016/j.jclepro.2025.146623. Full text in Research Archive Show summary

  Product-service systems (PSS) where business combines goods and services presents a promising approach to reduce environmental impacts while still providing economic prosperity. PSS has been assessed for more than 20 years, but there is still a need for empirical evidence of the effects and development of applicable assessment methodologies based on life cycle assessment (LCA). This paper presents a novel approach to address environmental performance of PSS through life cycle based eco-efficiency that can be consistently benchmarked with macro level data. The approach was based on a method developed for assessing new business models with LCA and includes a case study for a rental company with power tools and hardware equipment. The results show that from a user perspective, the environmental benefit of renting a product depends on number of uses that is needed and transport distance, but also the weight of the product. The heavier and more expensive products are more beneficial when it comes to costs, carbon footprint and resource use. From a PSS business management perspective, two approaches were compared. First a consequential LCA approach where rental substitutes ownership and second the novel approach with eco-efficiency decoupling indicators. The consequential approach favours heavier products, and the business is dominated by a few products. For the eco-efficiency approach, the potential revenue is more important than weight. The eco-efficiency approach to LCA for PSS showed advantages to consequential LCA approach as it requires less user behaviour data and can be benchmarked with decoupling needed with the planetary boundaries framework.

• Shoaei, Parham; Kjøniksen, Anna-Lena; Pamies, Ramón & Pilehvar, Shima (2024). Characterization of 3D-printable geopolymer mortars: Effect of binder composition and basalt fiber reinforcement. Case Studies in Construction Materials. 20. doi: 10.1016/j.cscm.2024.e03335. Full text in Research Archive
• Tellnes, Lars G. F.; Pedersen, Asbjørn Olav; Pamies, Ramón; Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2024). Implementing life cycle thinking and climate change indicators in small and medium size enterprises. Sustainable Production and Consumption. 51, p. 278–291. doi: 10.1016/j.spc.2024.09.014. Full text in Research Archive
• Shoaei, Parham; Gallantree-Smith, Harrison Christopher; Pacheco, Victor Martínez; Pamies, Ramon Francisco Porras; Kjøniksen, Anna-Lena & Pilehvar, Shima (2024). Comparative analysis of 3D printing of Portland cement mortars with hydroxypropyl methylcellulose and microfibrillated cellulose as viscosity modifying agents. Materials & design. ISSN 0264-1275. 244. doi: 10.1016/j.matdes.2024.113124. Full text in Research Archive
• Vargemezis, G.N.; Zlotnicki, J.; Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter (2024). Contribution of VLF electromagnetic survey to the investigation of Hessdalen lights (Norway). Journal of Applied Geophysics. ISSN 0926-9851. 226. doi: 10.1016/j.jappgeo.2024.105398. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Koch, Christian; Torgersen, Mirielle & Kjøniksen, Anna-Lena (2023). Value capture from low embodied emissions of buildings - a business model innovation perspective. IOP Conference Series: Earth and Environmental Science (EES). ISSN 1755-1307. 1196. doi: 10.1088/1755-1315/1196/1/012096. Full text in Research Archive
• Romero-Espinosa, Andrea; Sanfèlix, Susana G.; Morales-Cantero, Alejandro; Cuesta, Ana; Kjøniksen, Anna-Lena & Aranda, Miguel A. G. [Show all 8 contributors for this article] (2023). Processing of calcium sulfoaluminate eco-cement coatings containing microencapsulated phase change materials. Advances in Cement Research. ISSN 0951-7197. doi: 10.1680/jadcr.23.00077. Full text in Research Archive
• Li, Yuhan; Zhu, Kaizheng; Bu, Huaitian; Fu, Zhenyu; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 7 contributors for this article] (2023). Miktoarm PEG–PCL Star Copolymer (AB6) Blend Composite Solid Electrolyte for All-Solid-State Lithium Metal Battery. Macromolecules. ISSN 0024-9297. 56(19), p. 7921–7930. doi: 10.1021/acs.macromol.3c01621. Full text in Research Archive Show summary

  A series of AB6 type-7 miktoarm star copolymers consisting of poly(ethylene glycol) (PEG) as the A arm and poly(ε-caprolactone) (PCL) as the B arm are synthesized by controlled ring-opening polymerization of the ε-caprolactone monomer. The chemical structure is confirmed and characterized by nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectroscopies. The synthesized PEG–PCL star copolymers (PAB6) (Mn = 8400, 16,820, and 32,480) with arms of different lengths are introduced into the poly(ethylene oxide)-based solid electrolyte system. Moreover, the electrochemical, mechanical, and thermochemical properties of composite solid polymer electrolytes are enhanced by adding three miktoarm PEG–PCL star copolymers (referred to as PAB6–1, PAB6–2, and PAB6–3). The unique low-molecular-weight miktoarm copolymers with a central etheroxy group and branched carboxyl groups interact with poly(ethylene oxide) segments and lithium ions, enhancing the segment mobility of the polymer and lithium-ion transfer. Therefore, all-solid-state lithium metal batteries by the serial miktoarm star copolymer composite electrolytes display a high capacity retention of 128.1 mAh g–1 after 390 cycles.

• Gomado, Foster Dodzi; Khalifeh, Mahmoud; Saasen, Arild; Sanfèlix, Susana G.; Kjøniksen, Anna-Lena & Aasen, Jan Aage (2023). Effect of Calcium Expansive Additives on the Performance of Granite-Based Geopolymers for Zonal Isolation in Oil and Gas Wells. SPE Journal. ISSN 1086-055X. 28(6), p. 2790–2801. doi: 10.2118/217431-PA. Full text in Research Archive Show summary

  Geopolymers have emerged as a promising alternative to Portland cement for oil and gas wells. Achieving effective zonal isolation by use of geopolymers may require controlling their expansion. This study investigates the effect of calcium oxide (CaO) as an expansive agent on the performance of geopolymer-based sealing materials. Specifically, we explore the impact of CaO reactivity on various material properties using isothermal calorimetry, Brunauer-Emmett-Teller (BET) surface area analysis, linear expansion (LE) test, shear bond strength, compressive strength, and hydraulic bond strength (HBS). Our results indicate that CaO reactivity is a critical factor affecting the properties and performance of geopolymers for zonal isolation. Lower reactivities are associated with longer induction periods and lower heat evolution, which in turn increase LE. While lower reactivity decreases compressive strength, it increases shear bond strength. However, the CaO with the lowest reactivity resulted in a very low HBS due to matrix cracking and leakage. Therefore, optimizing the reactivity of CaO expansive agents is essential to enhancing the properties of geopolymer-based sealing materials for oil and gas wells. Shown in this paper is the successful application of CaO as an expansive agent for granite-based geopolymers at shallow depths in oil and gas wells.

• Yin, Chunyang; Li, Qing; Zheng, Jun; Ni, Yaqiong; Wu, Huiqiong & Kjøniksen, Anna-Lena [Show all 9 contributors for this article] (2022). Progress in regulating electronic structure strategies on Cu-based bimetallic catalysts for CO<inf>2</inf> reduction reaction. Advanced Powder Materials (APM). 1(4). doi: 10.1016/j.apmate.2022.100055. Full text in Research Archive
• Wu, Huiqiong; Lei, Yulai; Wang, Jingxing; Tan, Yun; Song, Xianwen & Zheng, Jun [Show all 11 contributors for this article] (2022). Exploiting CMC@Fe3O4 nanoparticles as a multi-functional component for hydrogel fabrication. Journal of Physics D: Applied Physics. ISSN 0022-3727. 55(40). doi: 10.1088/1361-6463/ac8350. Full text in Research Archive
• Avilés, María-Dolores; Sánchez-Rodríguez, Cristian; Pamies, Ramon Francisco Porras; Bermúdez, María-Dolores; Carrión-Vilches, Francisco-José & Sanfèlix, Susana G. [Show all 7 contributors for this article] (2022). New Water-Ethylene Glycol Lubricants with Stearate Ionic Liquid Crystal Additive. Lubricants. 10(10). doi: 10.3390/lubricants10100241. Full text in Research Archive Show summary

  The main purpose of the present study is to improve the tribological performance of aqueous lubricants with the use of ecofriendly, fatty acid-derived additives. The protic ionic liquid crystal bis(2-hydroxyethyl)ammonium stearate (DES) has been added to 50:50 water+ethylene glycol (W–EG) to obtain (W–EG)+0.5%DES; (W–EG)+1%DES and (W–EG)+2%DES emulsions. The new lubricants have been studied in sapphire-AISI (American Iron and Steel Institute) 316L stainless-steel pin-on-disk sliding contacts. The addition of DES reduces the friction coefficient by up to 76% and wear rate by up to 80%, with respect to (W–EG). The best performance is found for the emulsions with the lower proportion of DES (0.5 and 1 wt.%). These results have been related to viscosity and turbidity values. Wear mechanisms have been studied by Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDX) and by Raman microscopy. While W–EG shows a severe abrasive mechanism, no abrasion marks are present inside the wear track after lubrication with (W–EG)+0.5%DES, the emulsion with the lowest wear rate. After lubrication with W–EG, an increase in oxygen content is observed inside the wear track, as determined by EDX and confirmed by Raman microscopy, which shows the presence of iron oxides. The addition of DES reduces these oxidation processes.

• Wu, Huiqiong; Zhang, Yi; Kjøniksen, Anna-Lena; Zhou, Xuechang & Zhou, Xuelong (2021). Wearable Biofuel Cells: Advances from Fabrication to Application. Advanced Functional Materials. ISSN 1616-301X. 31(48). doi: 10.1002/adfm.202103976. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Madsen, Dan; Serrano, Angel; Carmona, Manuel; Hees, Patrick Van & Rodriguez, Juan F. [Show all 7 contributors for this article] (2021). Flame retardancy of rigid polyurethane foams containing thermoregulating microcapsules with phosphazene-based monomers. Journal of Materials Science. ISSN 0022-2461. 56, p. 1172–1188. doi: 10.1007/s10853-020-05389-6. Full text in Research Archive Show summary

  Thermoregulating microcapsules (MC) with flame-retardant properties were used to produce polyurethane (PU) foams. Thermogravimetric analyses of the microcapsules performed under atmospheric air and nitrogen confirmed that the hexa(methacryloylethylenedioxy) cyclotriphosphazene (PNC-HEMA) monomer raised the amount of residue after exposure to high temperature, proving the formation of a thermally stable char layer. Additionally, the flame-retardant properties of the microcapsules were analyzed by micro-combustion calorimetry (MCC), and the PU foams were tested by both MCC and cone calorimetry. The total heat release and maximum heat release rate were lower for microcapsules containing the flame-retardant PNC-HEMA. The composition of the microcapsules has been proved by MCC and TGA, where the release of the encapsulated phase change material (PCM) occurred at the expected temperature. However, in PU foams, the release of PCM is shifted to higher temperatures. Accordingly, these materials can be considered as an important alternative to commonly used microcapsules containing phase PCMs, where a lower flammability is required for their future application.

• Bui, Tri Quang; Magnussen, Ole Morten; Cao, Vinh Duy; Wang, Wei; Kjøniksen, Anna-Lena & Aaker, Olav (2021). Osmotic engine converting energy from salinity difference to a hydraulic accumulator by utilizing polyelectrolyte hydrogels. Energy. ISSN 0360-5442. 232, p. 1–7. doi: 10.1016/j.energy.2021.121055. Full text in Research Archive Show summary

  Efficient harvesting of the mixing energy from the salinity gradient between sea and river water remains a challenge. Recently, utilization of the swelling/shrinking properties of hydrogels has been explored as a new means for extracting this energy. However, former investigations are mainly limited to examining the performance of the hydrogels when lifting applied weights, and calculating the energy that could potentially be extracted. In this study, we demonstrate a novel osmotic engine with a mechanical energy transmission prototype, which can convert and store the green mixing energy in a form that can be utilized to perform mechanical work. The osmotic engine includes a cylinder containing the hydrogel, an oil-hydraulic cylinder and a hydraulic accumulator. The lifting energy from the hydrogel is transferred to the oil-hydraulic cylinder through a lever, which acts as a pump and accumulate the hydraulic oil under high pressure in the hydraulic accumulator. The system was tested with a hydrogel of poly(acrylic acid) semi-interpenetrated with poly(4-styrenessulfonic acid-co-maleic acid) sodium. This hydrogel produced up to 36 J per shrinking/swelling cycle, and exhibited an efficiency of 0.53% at optimum conditions.

• Bui, Tri Quang; Cao, Vinh Duy; Wang, Wei; Nguyen, Hung Thanh & Kjøniksen, Anna-Lena (2021). Energy Lost in a Hydrogel Osmotic Engine Due to a Pressure Drop. Industrial & Engineering Chemistry Research. ISSN 0888-5885. 60(36), p. 13348–13357. doi: 10.1021/acs.iecr.1c00409. Full text in Research Archive Show summary

  Utilizing hydrogels to harvest salinity gradient energy from solutions of different salinities has recently attracted interest. Polyelectrolyte hydrogels exhibit cyclic swelling/deswelling when alternately exposed to freshwater and seawater. This can be utilized to convert the mixing energy of the two solutions into mechanical energy. Hydrogels consisting of a semi-interpenetrating network (semi-IPN) of poly(4-styrene sulfonic acid-co-maleic acid) sodium salt and polyacrylic acid was prepared at various cross-linking densities. The energy lost due to a pressure drop in the system during the deswelling/swelling process of these hydrogels is examined, and the effects of tubing dimensions, hydrogel cylinder size, gel particle size, and the volume fraction within the hydrogel cylinder occupied by the flowing liquid (ε) are investigated. In addition, a small-scale osmotic engine was compared to a scaled-up system. ε was found to be the factor that had the largest effect on the energy loss. It was found that ε is strongly dependent on the degree of swelling of the hydrogels. When the hydrogels swell, they deform more easily under pressure. This markedly decreases ε, thereby inducing a high pressure drop in the system and a correspondingly large energy loss. Accordingly, the pressure drop when pumping through the hydrogel is the major contributor to the energy loss in the system. When the hydrogel particles deform too much, the energy needed to pump the flowing liquid through the hydrogels exceeds the energy produced by the system. Developing a hydrogel system that deforms less in its swollen state is therefore essential for improving the energy efficiencies of these osmotic engines.

• Bui, Tri Quang; Cao, Vinh Duy; Wang, Wei & Kjøniksen, Anna-Lena (2021). Recovered Energy from Salinity Gradients Utilizing Various Poly(Acrylic Acid)-Based Hydrogels. Polymers. 13(4), p. 1–16. doi: 10.3390/polym13040645. Full text in Research Archive Show summary

  Hydrogels can be utilized to extract energy from salinity gradients when river water mixes with seawater. Saline-sensitive hydrogels exhibit a reversible swelling/shrinking process when they are, alternately, exposed to fresh and saline water. We present a comparison of several poly(acrylic acid)-based hydrogels, including poly(acrylic acid) (PAA), poly(acrylic acid-co-vinylsulfonic acid) (PAA/PVSA), and poly(4-styrenessulfonic acid-co-maleic acid) interpenetrated in a poly(acrylic acid) network (PAA/PSSA-MA). The hydrogels were synthesized by free radical polymerization, copolymerization, and by semi-IPN (interpenetrating polymer network). The hydrogels were placed in a piston-like system to measure the recovered energy. Semi-IPN hydrogels exhibit a much higher recovered energy compared to the copolymer and PAA hydrogel. The recovered energy of 60 g swollen gel was up to 4 J for the PAA/PSSA-MA hydrogel. The obtained energy per gram dried gel was up to 13.3 J/g. The swelling volume of the hydrogels was maintained for 30 cycles without decline in recovered energy.

• Quan, Zhilong; Luo, Chunyang; Zhu, Bitong; Zhao, Chungui; Yang, Mingyi & Bjørås, Magnar [Show all 8 contributors for this article] (2021). Synthesis and antimicrobial activities of chitosan/polypropylene carbonate-based nanoparticles. RSC Advances. 11(17), p. 10121–10129. doi: 10.1039/d0ra09257f. Full text in Research Archive Show summary

  Antibiotic resistance is an emerging threat to public health. The development of a new generation of antimicrobial compounds is therefore currently required. Here we report a novel antimicrobial polymer of chitosan/polypropylene carbonate nanoparticles (CS/PPC NPs). These were designed and synthesized from readily available chitosan and a reactive oligomer polypropylene carbonate (PPC)-derived epoxy intermediate. By employing a simple and efficient functionalized strategy, a series of micelle-like chitosan-graft-polypropylene carbonate (CS-g-PPC) polymers and chitosan–polypropylene carbonate (CS–PPC) microgels were prepared by reacting mono-/bis-epoxy capped PPC with chitosan. The chemical structure, particle size, and surface charge of the newly synthesized polymers were characterized by infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, dynamic light scattering (DLS), and zeta potential measurements. The antimicrobial activities of these nanoparticles were determined in both Gram-positive bacteria (S. aureus) and Gram-negative bacteria (E. coli). Minimum inhibitory concentration (MIC), the nanoparticle concentration needed to completely inhibit the bacterial growth, was found at 128 μg mL−1 to 1024 μg mL−1, strongly depending both on the nature of the epoxy-imine network formed from the functional groups (mono- or bis-capped epoxy groups reacting with amine groups) and the feed ratio of the functional groups (-epoxy/-NH2) between the functionalized PPC and chitosan. No hemolysis was observed at concentrations well in excess of the effective bacteria-inhibiting concentrations. These findings provide a novel strategy to fabricate a new type of nanoantibiotic for antimicrobial applications.

• Pilehvar, Shima; Arnhof, Marlies; Erichsen, Andreas; Valentini, Luca & Kjøniksen, Anna-Lena (2021). Investigation of severe lunar environmental conditions on the physical and mechanical properties of lunar regolith geopolymers. Journal of Materials Research and Technology (JMR&T). ISSN 2238-7854. 11, p. 1506–1516. doi: 10.1016/j.jmrt.2021.01.124. Full text in Research Archive Show summary

  3D-printing of geopolymers produced from lunar regolith is an interesting option for space in situ habitats. In this study, the influence of the severe lunar environmental conditions such as extreme temperature variations and vacuum on the physical and mechanical properties of lunar regolith geopolymers were investigated. Additionally, the effect of different amounts of urea as a geopolymer superplasticizer was evaluated. Utilization of urea was found to reduce the water needed to reach the same workability by up to 32%. Extrudability tests showed that mixtures containing 3 wt.% urea could be continuously extruded, and built up into a five layer structure without any noticeable deformation. Addition of urea decreased the compressive strength after exposure to the temperature variations of one lunar day–and–night cycle during curing. However, urea can prevent concrete degradation after the lunar cycle by increasing the amounts of air voids. X-ray tomography showed that the porosity became higher when urea was added to the samples, and increased markedly when the samples were cured in vacuum.

• Zhu, Kaizheng; Pamies, Ramon Francisco Porras; Al-Manasir, Nodar; Cifre, José G. Hernández; Torre, José Garcia De la & Nyström, Bo [Show all 7 contributors for this article] (2020). The Effect of Number of Arms on the Aggregation Behavior of Thermoresponsive Poly(N‐isopropylacrylamide) Star Polymers. ChemPhysChem. ISSN 1439-4235. 21(12), p. 1258–1271. doi: 10.1002/cphc.202000273. Full text in Research Archive Show summary

  The thermoresponsive nature of aqueous solutions of poly(N‐isopropylacrylamide) (PNIPAAM) star polymers containing 2, 3, 4, and 6 arms has been investigated by turbidity, dynamic light scattering, rheology, and rheo‐SALS. Simulations of the thermosensitive nature of the single star polymers have also been conducted. Some of the samples form aggregates even at temperatures significantly below the lower critical solution temperature (LCST) of PNIPAAM. Increasing concentration and number of arms promotes associations at low temperatures. When the temperature is raised, there is a competition between size increase due to enhanced aggregation and a size reduction caused by contraction. Monte Carlo simulations show that the single stars contract with increasing temperature, and that this contraction is more pronounced when the number of arms is increased. Some samples exhibit a minimum in the turbidity data after the initial increase at the cloud point. The combined rheology and rheo‐SALS data suggest that this is due to a fragmentation of the aggregates followed by re‐aggregation at even higher temperatures. Although the 6‐arm star polymer aggregates more than the other stars at low temperatures, the more compact structure renders it less prone to aggregation at temperatures above the cloud point.

• Avilés, María-Dolores; Cao, Vinh Duy; Sánchez, Cristian; Arias-Pardilla, Joaquín; Carrión-Vilches, Francisco-José & Sanes, José [Show all 9 contributors for this article] (2020). Effect of temperature on the rheological behavior of a new aqueous liquid crystal bio-lubricant. Journal of Molecular Liquids. ISSN 0167-7322. 301, p. 112406–112406. doi: 10.1016/j.molliq.2019.112406. Full text in Research Archive
• Pilehvar, Shima; Arnhof, Marlies; Pamies, Ramon; Valentini, Luca & Kjøniksen, Anna-Lena (2020). Utilization of urea as an accessible superplasticizer on the moon for lunar geopolymer mixtures. Journal of Cleaner Production. ISSN 0959-6526. 247, p. 119177–119177. doi: 10.1016/j.jclepro.2019.119177. Full text in Research Archive
• Pilehvar, Shima; Sanfèlix, Susana G.; Szczotok-Piechaczek, Anna Maria; Rodriguez, Juan F.; Valentini, Luca & Lanzón, Marcos [Show all 8 contributors for this article] (2020). Effect of temperature on geopolymer and Portland cement composites modified with Micro-encapsulated Phase Change materials. Construction and Building Materials. ISSN 0950-0618. 252, p. 119055–119055. doi: 10.1016/j.conbuildmat.2020.119055. Full text in Research Archive
• Pilehvar, Shima; Szczotok-Piechaczek, Anna Maria; Carmona, Manuel; Pamies, Ramón & Kjøniksen, Anna-Lena (2020). The effect of microencapsulated phase change materials on the rheology of geopolymer and Portland cement mortars. Journal of The American Ceramic Society. ISSN 0002-7820. 103(10), p. 5852–5869. doi: 10.1111/jace.17215. Full text in Research Archive Show summary

  The effect of microencapsulated phase‐change materials (MPCM) on the rheological properties of pre‐set geopolymer and Portland cement mortars was examined. Microcapsules with hydrophilic and hydrophobic shells were compared. The shear rate dependency of the viscosities fitted well to a double Carreau model. The zero shear viscosities are higher for geopolymer mortar, illustrating poorer workability. The time evolution of the viscosities was explored at shear rates of 1 and 10 s−1. New empirical equations were developed to quantify the time‐dependent viscosity changes. The highest shear rate disrupted the buildup of the mortar structures much more than the lower shear rate. Microcapsules with a hydrophobic shell affect the rheological properties much less than the microcapsules with a hydrophilic shell, due to the higher water adsorption onto the hydrophilic microcapsules. Shear forces was found to break down the initial structures within geopolymer mortars more easily than for Portland cement mortars, while the geopolymer reaction products are able to withstand shear forces better than Portland cement hydration products. Initially, the viscosity of geopolymer mortars increases relatively slowly during due to formation of geopolymer precursors; at longer times, there is a steeper viscosity rise caused by the development of a 3D‐geopolymer network. Disruption of agglomerates causes the viscosities of portland cement mortars to decrease during the first few minutes, after which the hydration process (increasing viscosities) competes with shear‐induced disruption of the structures (decreasing viscosities), resulting in a complex viscosity behavior.

• Sanfèlix, Susana G.; Zea-García, Jesus D.; Londono-Zuluaga, Diana; Santacruz, Isabel; Torre, Ángeles G. De la & Kjøniksen, Anna-Lena (2020). Hydration development and thermal performance of calcium sulphoaluminate cements containing microencapsulated phase change materials. Cement and Concrete Research. ISSN 0008-8846. 132, p. 106039–106039. doi: 10.1016/j.cemconres.2020.106039. Full text in Research Archive
• Che, Loan Trinh; Hiorth, Marianne; Hoogenboom, Richard & Kjøniksen, Anna-Lena (2020). Complex temperature and concentration dependent self-assembly of poly(2-oxazoline) block copolymers. Polymers. 12:1495(7), p. 1–16. doi: 10.3390/polym12071495. Full text in Research Archive Show summary

  The effect of polymer concentration on the temperature-induced self-association of a block copolymer comprising a poly(2-ethyl-2-oxazoline) block and a random copolymer block consisting of 2-ethyl-2-oxazoline and 2-n-propyl-2-oxazoline (PEtO80-block-P(EtOxx-stat-PropO40-x) with x = 0, 4, or 8 were investigated by dynamic light scattering (DLS) and transmittance measurements (turbidimetry). The polymers reveal a complex aggregation behavior with up to three relaxation modes in the DLS data and with a transmittance that first goes through a minimum before it declines at high temperatures. At low temperatures, unassociated polymer chains were found to co-exist with larger aggregates. As the temperature is increased, enhanced association and contraction of the aggregates results in a drop of the transmittance values. The aggregates fragment into smaller micellar-like clusters when the temperature is raised further, causing the samples to become optically clear again. At high temperatures, the polymers aggregate into large compact clusters, and the samples become turbid. Interestingly, very large aggregates were observed at low temperatures when the polymer concentrations were low. The formation of these aggregates was also promoted by a more hydrophilic copolymer structure. The formation of large aggregates with an open structure at conditions where the solvent conditions are improved is probably caused by depletion flocculation of the smaller aggregates.

• Wu, Huiqiong; Lei, Yulai; Song, Xianwen; Tan, Yun; Sun, Zhifang & Zhang, Yi [Show all 9 contributors for this article] (2019). Real time rheological study of first network effects on the in situ polymerized semi-interpenetrating hydrogels. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 575, p. 111–117. doi: 10.1016/j.colsurfa.2019.05.002. Full text in Research Archive
• Pilehvar, Shima; Szczotok-Piechaczek, Anna Maria; Rodríguez, Juan F.; Valentini, Luca; Lanzón, Marcos & Pamies, Ramon Francisco Porras [Show all 7 contributors for this article] (2019). Effect of freeze-thaw cycles on the mechanical behavior of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials. Construction and Building Materials. ISSN 0950-0618. 200, p. 94–103. doi: 10.1016/j.conbuildmat.2018.12.057. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Bringas, Carlos Salas; Szczotok-Piechaczek, Anna Maria; Bui, Tri Quang & Carmona, Manuel [Show all 8 contributors for this article] (2019). Thermal analysis of geopolymer concrete walls containing microencapsulated phase change materials for building applications. Solar Energy. ISSN 0038-092X. 178, p. 295–307. doi: 10.1016/j.solener.2018.12.039. Full text in Research Archive
• Cao, Vinh Duy; Bui, Tri Quang & Kjøniksen, Anna-Lena (2019). Thermal analysis of multi-layer walls containing geopolymer concrete and phase change materials for building applications. Energy. ISSN 0360-5442. 186, p. 115792–115792. doi: 10.1016/j.energy.2019.07.122. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Kjøniksen, Anna-Lena; Rodríguez, Juan F. & Carmona, Manuel (2019). The accurate diffusive model for predicting the vapor pressure of phase change materials by thermogravimetric analysis. Thermochimica Acta. ISSN 0040-6031. 676, p. 64–70. doi: 10.1016/j.tca.2019.04.001. Full text in Research Archive
• Wu, Huiqiong; Zheng, Jun; Kjøniksen, Anna-Lena; Wang, Wei; Zhang, Yi & Ma, Jianmin (2019). Metallogels: Availability, applicability, and advanceability. Advanced Materials. ISSN 0935-9648. 31:1806204(12), p. 1–23. doi: 10.1002/adma.201806204. Full text in Research Archive
• Sanfèlix, Susana G.; Santacruz, Isabel; Szczotok-Piechaczek, Anna Maria; Belloc, Luis Miguel O.; Torre, Ángeles G. De la & Kjøniksen, Anna-Lena (2019). Effect of Microencapsulated Phase Change Materials on the Flow Behavior of Cement Composites. Construction and Building Materials. ISSN 0950-0618. 202, p. 353–362. doi: 10.1016/j.conbuildmat.2018.12.215. Full text in Research Archive
• Arnhof, Marlies; Pilehvar, Shima; Kjøniksen, Anna-Lena & Cheibas, Ina (2019). Basalt fibre reinforced geopolymer made from lunar regolith simulant. EUCASS Proceedings Series. ISSN 2101-1559. doi: 10.13009/EUCASS2019-725. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Bringas, Carlos Salas; Szczotok-Piechaczek, Anna Maria; Bui, Tri Quang & Carmona, Manuel [Show all 8 contributors for this article] (2018). Thermal performance and numerical simulation of geopolymer concrete containing different types of thermoregulating materials for passive building applications. Energy and Buildings. ISSN 0378-7788. 173, p. 678–688. doi: 10.1016/j.enbuild.2018.06.011. Full text in Research Archive
• Pilehvar, Shima; Cao, Vinh Duy; Szczotok-Piechaczek, Anna Maria; Carmona, Manuel; Valentini, Luca & Lanzón, Marcos [Show all 8 contributors for this article] (2018). Physical and mechanical properties of fly ash and slag geopolymer concrete containing different types of micro-encapsulated phase change materials. Construction and Building Materials. ISSN 0950-0618. 173, p. 28–39. doi: 10.1016/j.conbuildmat.2018.04.016. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Bringas, Carlos Salas; Szczotok-Piechaczek, Anna Maria; Do, Nu Bich Duyen & Le, Hoa Thanh [Show all 9 contributors for this article] (2018). Influence of Microcapsule Size and Shell Polarity on the Time-Dependent Viscosity of Geopolymer Paste. Industrial & Engineering Chemistry Research. ISSN 0888-5885. 57(29), p. 9457–9464. doi: 10.1021/acs.iecr.8b01961. Full text in Research Archive
• Bui, Tri Quang; Cao, Vinh Duy; Do, Nu Bich Duyen; Christoffersen, Trine Eker; Wang, Wei & Kjøniksen, Anna-Lena (2018). Salinity gradient energy from expansion and contraction of poly(allylamine hydrochloride) hydrogels. ACS Applied Materials & Interfaces. ISSN 1944-8244. 10(26), p. 22218–22225. doi: 10.1021/acsami.8b05333. Full text in Research Archive Show summary

  Salinity gradients exhibit a great potential for production of renewable energy. Several techniques such as pressure-retarded osmosis and reverse electrodialysis have been employed to extract this energy. Unfortunately, these techniques are restricted by the high costs of membranes and problems with membrane fouling. However, the expansion and contraction of hydrogels can be a new and cheaper way to harvest energy from salinity gradients since the hydrogels swell in freshwater and shrink in saltwater. We have examined the effect of cross-linker concentration and different external loads on the energy recovered for this type of energy-producing systems. Poly(allylamine hydrochloride) hydrogels were cross-linked with glutaraldehyde to produce hydrogels with excellent expansion and contraction properties. Increasing the cross-linker concentration markedly improved the energy that could be recovered from the hydrogels, especially at high external loads. A swollen hydrogel of 60 g could recover more than 1800 mJ when utilizing a high cross-linker concentration, and the maximum amount of energy produced per gram of polymer was 3.4 J/g. Although more energy is recovered at high cross-linking densities, the maximum amount of energy produced per gram of polymer is highest at an intermediate cross-linking concentration. Energy recovery was reduced when the salt concentration was increased for the low-concentration saline solution. The results illustrate that hydrogels are promising for salinity gradient energy recovery, and that optimizing the systems significantly increases the amount of energy that can be recovered.

• Cao, Vinh Duy; Bringas, Carlos Salas; Schüller, Reidar Barfod; Szczotok-Piechaczek, Anna Maria; Hiorth, Marianne & Carmona, Manuel [Show all 8 contributors for this article] (2018). Rheological and thermal properties of suspensions of microcapsules containing phase change materials. Colloid and Polymer Science. ISSN 0303-402X. 296(5), p. 981–988. doi: 10.1007/s00396-018-4316-9. Full text in Research Archive Show summary

  The thermal and rheological properties of suspensions of microencapsulated phase change materials (MPCM) in glycerol were investigated. When the microcapsule concentration is raised, the heat storage capacity of the suspensions becomes higher and a slight decline in the thermal conductivity of the suspensions is observed. The temperature-dependent shear-thinning behaviour of the suspensions was found to be strongly affected by non-encapsulated phase change materials (PCM). Accordingly, the rheological properties of the MPCM suspensions could be described by the Cross model below the PCM melting point while a power law model best described the data above the PCM melting point. The MPCM suspensions are interesting for energy storage and heat transfer applications. However, the non-encapsulated PCM contributes to the agglomeration of the microcapsules, which can lead to higher pumping consumption and clogging of piping systems.

• Cao, Vinh Duy; Bringas, Carlos Salas; Schüller, Reidar Barfod; Szczotok-Piechaczek, Anna Maria & Kjøniksen, Anna-Lena (2018). Time-dependent structural breakdown of microencapsulated phase change materials suspensions. Journal of Dispersion Science and Technology. ISSN 0193-2691. 40(2), p. 179–185. doi: 10.1080/01932691.2018.1462194. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Carmona, Manuel; Kjøniksen, Anna-Lena & Rodriguez, Juan F. (2018). The role of radical polymerization in the production of thermoregulating microcapsules or polymers from saturated and unsaturated fatty acids. Journal of Applied Polymer Science. ISSN 0021-8995. 135, p. 45970–45970. doi: 10.1002/app.45970. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Garrido, Ignacio; Carmona, Manuel; Kjøniksen, Anna-Lena & Rodriguez, Juan F. (2018). Predicting microcapsules morphology and encapsulation efficiency by combining the spreading coefficient theory and polar surface energy component. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 554, p. 49–59. doi: 10.1016/j.colsurfa.2018.06.022. Full text in Research Archive
• Vargemezis, George; Zlotnicki, Jacques; Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter (2018). Near Surface Conductive Zones in Hessdalen Valley (Norway) Inferred by Preliminary VLF Surveys. 24th European Meeting of Environmental and Engineering Geophysics. ISSN 2214-4609. doi: 10.3997/2214-4609.201802511. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Bringas, Carlos Salas; Szczotok-Piechaczek, Anna Maria; Valentini, Luca & Carmona, Manuel [Show all 8 contributors for this article] (2018). Influence of microcapsule size and shell polarity on thermal and mechanical properties of thermoregulating geopolymer concrete for passive building applications. Energy Conversion and Management. ISSN 0196-8904. 164, p. 198–209. doi: 10.1016/j.enconman.2018.02.076. Full text in Research Archive
• Szczotok, Anna; Carmona, Manuel; Kjøniksen, Anna-Lena & Rodriguez, Juan F. (2017). Equilibrium adsorption of polyvinylpyrrolidone and its role on thermoregulating microcapsules synthesis process. Colloid and Polymer Science. ISSN 0303-402X. 295(5), p. 783–792. doi: 10.1007/s00396-017-4061-5. Full text in Research Archive
• Pilehvar, Shima; Cao, Vinh Duy; Szczotok-Piechaczek, Anna Maria; Valentini, Luca; Salvioni, Davide & Magistri, Matteo [Show all 8 contributors for this article] (2017). Mechanical properties and microscale changes of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials. Cement and Concrete Research. ISSN 0008-8846. 100, p. 341–349. doi: 10.1016/j.cemconres.2017.07.012. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Carmona, M; Serrano, A.; Kjøniksen, Anna-Lena & Rodriguez, Juan F. (2017). Development of thermoregulating microcapsules with cyclotriphosphazene as a flame retardant agent. IOP Conference Series: Materials Science and Engineering. ISSN 1757-8981. 251(1). doi: 10.1088/1757-899X/251/1/012120. Full text in Research Archive
• Bandyopadhyay, Sulalit; Alvi, Muhammad Awais Ashfaq; Sharma, Anuvansh; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 7 contributors for this article] (2017). Influence of polymer coating on release of L-dopa from core-shell Fe@Au nanoparticle systems. Colloid and Polymer Science. ISSN 0303-402X. 295(2), p. 391–402. doi: 10.1007/s00396-017-4015-y. Full text in Research Archive Show summary

  We report on the effect of different stimuli-responsive polymer shells on Fe@Au core-shell nanoparticles (NPs) with respect to thermoresponse as well as loading and release characteristics. The hybrid NP systems were investigated using a wide array of characterization techniques including dynamic light scattering, electrophoretic mobility, UV-visible spectroscopy, and scanning transmission electron microscopy. Three different polymeric shells were selected for loading and release of l-dopa: thiolated polyethylene glycol (PEG), poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAAM_AAc) microgel crosslinked with N,N′-methylenebis(acrylamide) (BIS), and finally concomitant PEG and PNIPAAM_AAc microgel (Fe@Au_PEG_Microgel). All three shells were found to exhibit high loading (∼10%) and encapsulation efficiencies up to 100 μg l-dopa/mg. Although the loading efficiencies are comparable for the three systems, Fe@Au_PEG_Microgel has the highest release (87%) at elevated temperature and acidic conditions. The attenuated release from the PEG-based systems can be attributed to stronger dipole-dipole interactions between the carboxyl group of PEG and the amino group of l-dopa.

• Cao, Vinh Duy; Pilehvar, Shima; Bringas, Carlos Salas; Szczotok, Anna; Rodriguez, Juan F. & Carmona, Manuel [Show all 8 contributors for this article] (2017). Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications. Energy Conversion and Management. ISSN 0196-8904. 133, p. 56–66. doi: 10.1016/j.enconman.2016.11.061. Full text in Research Archive Show summary

  Concretes with a high thermal energy storage capacity were fabricated by mixing microencapsulated phase change materials (MPCM) into Portland cement concrete (PCC) and geopolymer concrete (GPC). The effect of MPCM on thermal performance and compressive strength of PCC and GPC were investigated. It was found that the replacement of sand by MPCM resulted in lower thermal conductivity and higher thermal energy storage, while the specific heat capacity of concrete remained practically stable when the phase change material (PCM) was in the liquid or solid phase. Furthermore, the thermal conductivity of GPC as function of MPCM concentration was reduced at a higher rate than that of PCC. The power consumption needed to stabilize a simulated indoor temperature of 23°C was reduced after the addition of MPCM. GPC exhibited better energy saving properties than PCC at the same conditions. A significant loss in compressive strength was observed due to the addition of MPCM to concrete. However, the compressive strength still satisfies the mechanical European regulation (EN 206-1, compressive strength class C20/25) for concrete applications. Finally, MPCM-concrete provided a good thermal stability after subjecting the samples to 100 thermal cycles at high heating/cooling rates.

• Pamies, Ramon Francisco Porras; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2016). Temperature effects on the stability of gold nanoparticles in the presence of a cationic thermoresponsive copolymer. Journal of nanoparticle research. ISSN 1388-0764. 18(11). doi: 10.1007/s11051-016-3627-3. Full text in Research Archive
• Klemetsrud, Therese; Kjøniksen, Anna-Lena; Hiorth, Marianne; Jacobsen, Jette & Smistad, Gro (2016). Polymer coated liposomes for use in the oral cavity – a study of the in vitro toxicity, effect on cell permeability and interaction with mucin. Journal of liposome research. ISSN 0898-2104. 28(1), p. 62–73. doi: 10.1080/08982104.2016.1255640. Full text in Research Archive
• Klemetsrud, Therese; Hiorth, Marianne; Smistad, Gro & Kjøniksen, Anna-Lena (2015). Characterization of temperature induced changes in liposomes coated with poly(N-isopropylacrylamide-co-methacrylic acid). Journal of Colloid and Interface Science. ISSN 0021-9797. 450, p. 7–16. doi: 10.1016/j.jcis.2015.03.005. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Nyström, Bo & Sande, Sverre Arne (2015). Stabilization of Pluronic Gels by Hydrophobically Modified Hydroxyethylcellulose. International Journal of Polymeric Materials and Polymeric Biomaterials. ISSN 0091-4037. 64(2), p. 76–83. doi: 10.1080/00914037.2014.886245. Full text in Research Archive
• Lyngsø, Jeppe; Al-Manasir, Nodar; Behrens, Manja Annette; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 7 contributors for this article] (2015). Small-Angle X-ray Scattering Studies of Thermoresponsive Poly(N-isopropylacrylamide)Star Polymers in Water. Macromolecules. ISSN 0024-9297. 48(7), p. 2235–2243. doi: 10.1021/acs.macromol.5b00057. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Kjøniksen, Anna-Lena; Maleki, Atoosa; Nyström, Bo & Sande, Sverre Arne (2014). Microparticles based on hydrophobically modified chitosan as drug carriers. Journal of Applied Polymer Science. ISSN 0021-8995. 131(7). doi: 10.1002/app.40055. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Nyström, Bo & Sande, Sverre Arne (2014). Stabilization of Pluronic Gels in the Presence of Different Polysaccharides. Journal of Applied Polymer Science. ISSN 0021-8995. 131(13). doi: 10.1002/app.40465. Full text in Research Archive
• Behrens, Manja Annette; Lopez, Montse; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Nyström, Bo & Pedersen, Jan Skov (2014). The effect of cationic and anionic blocks on temperature-induced micelle formation. Journal of Applied Crystallography. ISSN 0021-8898. 47, p. 22–28. doi: 10.1107/S1600576713030033. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Cardoso, Ana Maria S.; Lima, Maria C. Pedroso de & Jurado, Amália S. [Show all 8 contributors for this article] (2014). Sustained release of naltrexone from poly(N-isopropylacrylamide) microgels. Journal of Pharmaceutical Sciences. ISSN 0022-3549. 103(1), p. 227–234. doi: 10.1002/jps.23780. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Cardoso, Ana Maria S.; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Morais, Catarina M. & Sande, Sverre Arne [Show all 10 contributors for this article] (2013). Temperature-Responsive Cationic Block Copolymers as Nanocarriers for Gene Delivery. International Journal of Pharmaceutics. ISSN 0378-5173. 448(1), p. 105–114. doi: 10.1016/j.ijpharm.2013.03.028. Full text in Research Archive
• Jonassen, Helene; Treves, Alessandro; Kjøniksen, Anna-Lena; Smistad, Gro & Hiorth, Marianne (2013). Preparation of Ionically Cross-Linked Pectin Nanoparticles in the Presence of Chlorides of Divalent and Monovalent Cations. Biomacromolecules. ISSN 1525-7797. 14(10), p. 3523–3531. doi: 10.1021/bm4008474. Full text in Research Archive
• Bayati, Solmaz; Pamies, Ramon Francisco Porras; Volden, Sondre; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Glomm, Wilhelm [Show all 7 contributors for this article] (2013). Influence of poly(ethylene glycol) block length on the adsorption of thermoresponsive copolymers onto gold surfaces. Journal of Materials Science. ISSN 0022-2461. 48(20), p. 7055–7062. doi: 10.1007/s10853-013-7516-1. Full text in Research Archive
• Klemetsrud, Therese; Jonassen, Helene; Hiorth, Marianne; Kjøniksen, Anna-Lena & Smistad, Gro (2013). Studies on pectin-coated liposomes and their interaction with mucin. Colloids and Surfaces B: Biointerfaces. ISSN 0927-7765. 103, p. 158–165. doi: 10.1016/j.colsurfb.2012.10.012. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Cardoso, Ana Maria S.; Marques, Eduardo F; Araújo, Maria J.; Kjøniksen, Anna-Lena & Sande, Sverre Arne [Show all 9 contributors for this article] (2013). In vitro cytotoxicity of a thermoresponsive gel system combining ethyl(hydroxyethyl) cellulose and lysine-based surfactants. Colloids and Surfaces B: Biointerfaces. ISSN 0927-7765. 102, p. 682–686. doi: 10.1016/j.colsurfb.2012.09.033. Full text in Research Archive
• Trinh, Loan Thi To; Lambermont-Thijs, Hanneke M. L.; Schubert, Ulrich S.; Hoogenboom, Richard & Kjøniksen, Anna-Lena (2012). Thermoresponsive Poly(2-oxazoline) Block Copolymers Exhibiting Two Cloud Points: Complex Multistep Assembly Behavior. Macromolecules. ISSN 0024-9297. 45(10), p. 4337–4345. doi: 10.1021/ma300570j. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2012). Effects of ionic strength on the size and compactness of chitosan nanoparticles. Colloid and Polymer Science. ISSN 0303-402X. 290(10), p. 919–929. doi: 10.1007/s00396-012-2604-3. Full text in Research Archive
• Wang, Wei; Mauroy, Henrik; Zhu, Kaizheng; Knudsen, Kenneth; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 7 contributors for this article] (2012). Complex coacervate micelles formed by a C18-capped cationic triblock thermoresponsive copolymer interacting with SDS. Soft Matter. ISSN 1744-683X. 8(45), p. 11514–11525. doi: 10.1039/c2sm26567b. Full text in Research Archive
• Behrens, Manja Annette; Lopez, Montse; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Nyström, Bo & Pedersen, Jan Skov (2012). Structure and Interactions of Charged Triblock Copolymers Studied by Small-Angle X-ray Scattering: Dependence on Temperature and Charge Screening. Langmuir. ISSN 0743-7463. 28(2), p. 1105–1114. doi: 10.1021/la202841q. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Kjøniksen, Anna-Lena; Pinazo, Aurora; Pérez, Lourdes; Cardoso, Ana Maria S. & Lima, Maria C. Pedroso de [Show all 9 contributors for this article] (2012). Thermoresponsive hydrogels with low toxicity from mixtures of ethyl(hydroxyethyl) cellulose and arginine-based surfactants. International Journal of Pharmaceutics. ISSN 0378-5173. 436(1-2), p. 454–462. doi: 10.1016/j.ijpharm.2012.07.018. Full text in Research Archive
• Ortega, Alvaro; Pamies, Ramon Francisco Porras; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Nyström, Bo & Torre, José García de la (2012). Characterization of low molecular mass thermosensitive diblock copolymers and their self-assembly by means of analytical ultracentrifugation. Colloid and Polymer Science. ISSN 0303-402X. 290(4), p. 297–306. doi: 10.1007/s00396-011-2542-5. Full text in Research Archive
• Behrens, Manja Annette; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Nyström, Bo & Pedersen, Jan Skov (2012). Small-Angle X-ray Scattering Study of Charged Triblock Copolymers as a Function of Polymer Concentration, Temperature, and Charge Screening. Macromolecules. ISSN 0024-9297. 45(1), p. 246–255. doi: 10.1021/ma2016216. Full text in Research Archive
• Shovsky, Alexander; Knohl, Stefan; Dedinaite, Andra; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 8 contributors for this article] (2012). Cationic Poly(N-isopropylacrylamide) Block Copolymer Adsorption Investigated by Dual Polarization Interferometry and Lattice Mean-Field Theory. Langmuir. ISSN 0743-7463. 28(39), p. 14028–14038. doi: 10.1021/la302154p. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2012). Stability of Chitosan Nanoparticles Cross-Linked with Tripolyphosphate. Biomacromolecules. ISSN 1525-7797. 13(11), p. 3747–3756. doi: 10.1021/bm301207a. Full text in Research Archive
• Fanaian, Shirin; Al-Manasir, Nodar; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2012). Effects of Hofmeister anions on the flocculation behavior of temperature-responsive poly(N-isopropylacrylamide) microgels. Colloid and Polymer Science. ISSN 0303-402X. 290(16), p. 1609–1616. doi: 10.1007/s00396-012-2689-8. Full text in Research Archive
• Al-Manasir, Nodar; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth & Nyström, Bo (2012). Effects of addition of anionic and cationic surfactants to Poly(N-isopropylacrylamide)-microgels with and without acrylic acid groups. Colloid and Polymer Science. ISSN 0303-402X. 290(10), p. 931–940. doi: 10.1007/s00396-012-2607-0. Full text in Research Archive
• Knudsen, Kenneth; Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2012). A pentablock polymer forming core-shell structures. Revista Cubana de Física. ISSN 0253-9268. 29(1E55). Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Kjøniksen, Anna-Lena; Marques, Eduardo; Araújo, Maria J.; Sande, Sverre Arne & Nyström, Bo (2012). Interactions between ethyl(hydroxyethyl) cellulose and lysine-based surfactants in aqueous media. European Polymer Journal. ISSN 0014-3057. 48(9), p. 1622–1631. doi: 10.1016/j.eurpolymj.2012.06.009. Full text in Research Archive
• Bayati, Solmaz; Zhu, Kaizheng; Trinh, Loan Thi To; Kjøniksen, Anna-Lena & Nyström, Bo (2012). Effects of Temperature and Salt Addition on the Association Behavior of Charged Amphiphilic Diblock Copolymers in Aqueous Solution. Journal of Physical Chemistry B. ISSN 1520-6106. 116(36), p. 11386–11395. doi: 10.1021/jp306833x. Full text in Research Archive
• Nguyen, Sanko; Alund, Siv Jorunn; Hiorth, Marianne; Kjøniksen, Anna-Lena & Smistad, Gro (2011). Studies on pectin coating of liposomes for drug delivery. Colloids and Surfaces B: Biointerfaces. ISSN 0927-7765. 88(2), p. 664–673. doi: 10.1016/j.colsurfb.2011.07.058. Full text in Research Archive
• Maleki, Atoosa; Zhu, Kaizheng; Pamies, Ramón; Schmidt, Ricardo Rodrigues; Kjøniksen, Anna-Lena & Karlsson, Göran [Show all 9 contributors for this article] (2011). Effect of polyethylene glycol (PEG) length on the association properties of temperature-sensitive amphiphilic triblock copolymers (PNIPAAM(m)-b-PEG(n)-b-PNIPAAM(m)) in aqueous solution. Soft Matter. ISSN 1744-683X. 7(18), p. 8111–8119. doi: 10.1039/c1sm05679d. Full text in Research Archive
• Jonassen, Helene & Kjøniksen, Anna-Lena (2011). Optical-scattering method for the determination of the local polymer concentration inside nanoparticles. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics. ISSN 1539-3755. 84(2), p. 022401–022401. doi: 10.1103/PhysRevE.84.022401. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo (2011). Temperature-Induced Aggregation Kinetics in Aqueous Solutions of a Temperature-Sensitive Amphiphilic Block Copolymer. Journal of Physical Chemistry B. ISSN 1520-6106. 115, p. 8975–8980. doi: 10.1021/jp202607p. Full text in Research Archive
• Volden, Sondre; Trinh, Loan Thi To; Kjøniksen, Anna-Lena; Yasuda, Masahiro; Nyström, Bo & Glomm, Wilhelm (2011). Gold Nanoparticles Affect Thermoresponse and Aggregation Properties of Mesoscopic Immunoglobulin G Clusters. Journal of Physical Chemistry C. ISSN 1932-7447. 115(23), p. 11390–11399. doi: 10.1021/jp2013072. Full text in Research Archive
• Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth Dahl & Nyström, Bo (2011). Characterization of temperature-induced association in aqueous solutions of charged ABCBA-type pentablock tercopolymers. Soft Matter. ISSN 1744-683X. 7(3), p. 1168–1175. doi: 10.1039/c0sm00892c. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng; Behrens, Manja; Pedersen, Jan Skov & Nyström, Bo (2011). Effects of Temperature and Salt Concentration on the Structural and Dynamical Features in Aqueous Solutions of Charged Triblock Copolymers. Journal of Physical Chemistry B. ISSN 1520-6106. 115(10), p. 2125–2139. doi: 10.1021/jp1075884. Full text in Research Archive
• Phan, Hang Thuy Thi; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2011). Temperature-responsive self-assembly of charged and uncharged hydroxyethylcellulose-graft-poly(N-isopropylacrylamide) copolymer in aqueous solution. Colloid and Polymer Science. ISSN 0303-402X. 289(9), p. 993–1003. doi: 10.1007/s00396-011-2423-y. Full text in Research Archive
• Pamies, Ramon Francisco Porras; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Glomm, Wilhelm R & Nyström, Bo (2010). Adsorption of Cationic Hydroxyethylcellulose Derivatives onto Planar and Curved Gold Surfaces. Langmuir. ISSN 0743-7463. 26(20), p. 15925–15932. doi: 10.1021/la102716m. Full text in Research Archive
• Pamies, Ramon Francisco Porras; Zhu, Kaizheng; Volden, Sondre; Kjøniksen, Anna-Lena; Karlsson, Göran & Glomm, Wilhelm [Show all 7 contributors for this article] (2010). Temperature-Induced Flocculation of Gold Particles with an Adsorbed Thermoresponsive Cationic Copolymer. Journal of Physical Chemistry C. ISSN 1932-7447. 114(50), p. 21960–21968. doi: 10.1021/jp106520k. Full text in Research Archive
• Trinh, Loan T. T.; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Knudsen, Kenneth Dahl & Glomm, Wilhelm [Show all 7 contributors for this article] (2010). Temperature-induced adsorption and optical properties of an amphiphilic diblock copolymer adsorbed onto flat and curved silver surfaces. Journal of Colloid and Interface Science. ISSN 0021-9797. 342(1), p. 142–146. doi: 10.1016/j.jcis.2009.10.007. Full text in Research Archive
• Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Genzer, Jan; Nyström, Bo & Glomm, Wilhelm (2010). Temperature-Dependent Optical Properties of Gold Nanoparticles Coated with a Charged Diblock Copolymer and an Uncharged Triblock Copolymer. ACS Nano. ISSN 1936-0851. 4(2), p. 1187–1201. doi: 10.1021/nn901517u. Full text in Research Archive
• Schmidt, Ricardo Rodriguez; Pamies, Ramon Francisco Porras; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Cifre, José G. Hernández & Nyström, Bo [Show all 7 contributors for this article] (2010). Single-Molecule Behavior of Asymmetric Thermoresponsive Amphiphilic Copolymers in Dilute Solution. Journal of Physical Chemistry B. ISSN 1520-6106. 114(27), p. 8887–8893. Full text in Research Archive
• Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2010). Characterization of complexation and phase behavior of mixed systems of unmodified and hydrophobically modified oppositely charged polyelectrolytes. Colloid and Polymer Science. ISSN 0303-402X. 288(10-11), p. 1121–1130. doi: 10.1007/s00396-010-2239-1. Full text in Research Archive
• Nyström, Bo; Kjøniksen, Anna-Lena; Beheshti, Neda; Maleki, Atoosa; Zhu, Kaizheng & Knudsen, Kenneth Dahl [Show all 9 contributors for this article] (2010). Characterization of polyelectrolyte features in polysaccharide systems and mucin. Advances in Colloid and Interface Science. ISSN 0001-8686. 158(1-2), p. 108–118. doi: 10.1016/j.cis.2009.05.003. Full text in Research Archive
• Dedinaite, Andra; Thormann, Esben; Olanya, Geoffrey; Claesson, Per M.; Nyström, Bo & Kjøniksen, Anna-Lena [Show all 7 contributors for this article] (2010). Friction in aqueous media tuned by temperature-responsive polymer layers. Soft Matter. ISSN 1744-683X. 6(11), p. 2489–2498. doi: 10.1039/c003320k. Full text in Research Archive
• Beheshti, Neda; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Knudsen, Kenneth Dahl & Nyström, Bo (2010). Viscosification in Polymer-Surfactant Mixtures at Low Temperatures. Journal of Physical Chemistry B. ISSN 1520-6106. 114(19), p. 6273–6280. doi: 10.1021/jp100333f. Full text in Research Archive
• Nyström, Bo; Kjøniksen, Anna-Lena; Beheshti, Neda; Zhu, Kaizheng & Knudsen, Kenneth D (2009). Rheological and Structural Aspects on Association of Hydrophobically Modified Polysaccharides. Soft Matter. ISSN 1744-683X. 5(7), p. 1328–1339. doi: 10.1039/b817349d. Full text in Research Archive
• Al-Manasir, Nodar; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth D; Karlsson, Göran & Nyström, Bo (2009). Effects of Temperature and pH on the Contraction and Aggregation of Microgels in Aqueous Suspensions. Journal of Physical Chemistry B. ISSN 1520-6106. 113(32), p. 11115–11123. doi: 10.1021/jp901121g. Full text in Research Archive
• Al-Manasir, Nodar; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Preparation and Characterization of Cross-Linked Polymeric Nanoparticles for Enhanced Oil Recovery Applications. Journal of Applied Polymer Science. ISSN 0021-8995. 113(3), p. 1916–1924. doi: 10.1002/app.30176. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng; Karlsson, Göran & Nyström, Bo (2009). Novel Transition Behavior in Aqueous Solutions of a Charged Thermoresponsive Triblock Copolymer. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 333(1-3), p. 32–45. doi: 10.1016/j.colsurfa.2008.09.024. Full text in Research Archive
• Trinh, Loan T. T.; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Knudsen, Kenneth D.; Volden, Sondre & Glomm, Wilhelm [Show all 8 contributors for this article] (2009). Slow salt-induced aggregation of citrate-covered silver particles in aqueous solutions of cellulose derivatives. Colloid and Polymer Science. ISSN 0303-402X. 298(12), p. 1391–1404. doi: 10.1007/s00396-009-2100-6. Full text in Research Archive
• Pamies, Ramon Francisco Porras; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Thermal Response of Low Molecular Weight Poly(N-isopropylacrylamide) Polymers in Aqueous Solution. Polymer Bulletin. ISSN 0170-0839. 62(4), p. 487–502. doi: 10.1007/s00289-008-0029-4. Full text in Research Archive
• Radu, Judit Eva Fleischer; Novak, Levente; Hartmann, John F.; Beheshti, Neda; Kjøniksen, Anna-Lena & Nyström, Bo [Show all 7 contributors for this article] (2008). Structural and Dynamical Characterization of Poly-Gamma-Glutamic Acid-Based Cross-Linked Nanoparticles. Colloid and Polymer Science. ISSN 0303-402X. 286, p. 365–376. doi: 10.1007/s00396-007-1776-8. Full text in Research Archive
• Kjøniksen, Anna-Lena; Laukkanen, Antti; Tenhu, Heikki & Nyström, Bo (2008). Anomalous turbidity, dynamical, and rheological properties in aqueous mixtures of a thermoresponsive PVCL-g-C11EO42 copolymer and an anionic surfactant. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 316, p. 159–170. Full text in Research Archive
• Bodnar, M; Kjøniksen, Anna-Lena; Molnar, RM; Hartmann, JF; Daroczi, L & Nyström, Bo [Show all 7 contributors for this article] (2008). Nanoparticles formed by complexation of poly-gamma-glutamic acid with lead ions. Journal of Hazardous Materials. ISSN 0304-3894. 153, p. 1185–1192. doi: 10.1016/j.jhazmat.2007.09.080. Full text in Research Archive
• Zhu, Kaizheng; Pamies, Ramon Francisco Porras; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Temperature-Induced Intermicellization of "Hairy" and "Crew-Cut" Micelles in an Aqueous Solution of a Thermoresponsive Copolymer. Langmuir. ISSN 0743-7463. 24(24), p. 14227–14233. Full text in Research Archive
• Liu, Z; Maleki, Atoosa; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Intramolecular and Intermolecular Association during Chemical Cross-Linking of Dilute Solutions of Different Polysaccharides under the Influence of Shear Flow. Journal of Physical Chemistry B. ISSN 1520-6106. 112(4), p. 1082–1089. doi: 10.1021/jp076497h. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng; Pamies, Ramon Francisco Porras & Nyström, Bo (2008). Temperature-Induced Formation and Contraction of Micelle-Like Aggregates in Aqueous Solutions of Thermoresponsive Short-Chain Copolymers. Journal of Physical Chemistry B. ISSN 1520-6106. 112(11), p. 3294–3299. doi: 10.1021/jp800404a. Full text in Research Archive
• Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Interaction behaviors in aqueous solutions of negatively and positively charged hydrophobically modified hydroxyethylcellulose in the presence of an anionic surfactant. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 328(1-3), p. 79–89. doi: 10.1016/j.colsurfa.2008.06.030. Full text in Research Archive
• Pamies, Ramon Francisco Porras; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth D & Nyström, Bo (2008). Temperature-induced intermicellization and contraction in aqueous mixtures of sodium dodecyl sulfate and an amphiphilic diblock copolymer. Journal of Colloid and Interface Science. ISSN 0021-9797. 326, p. 76–88. doi: 10.1016/j.jcis.2008.07.039. Full text in Research Archive
• Kjøniksen, Anna-Lena; Beheshti, Neda; Kotlar, Hans Kristian; Zhu, Kaizheng & Nyström, Bo (2008). Modified polysaccharides for use in enhanced oil recovery applications. European Polymer Journal. ISSN 0014-3057. 44, p. 959–967. doi: 10.1016/j.eurpolymj.2008.01.028. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Effect of pH on the Behavior of Hyaluronic Acid in Dilute and Semidilute Aqueous Solutions. Macromolecular Symposia. ISSN 1022-1360. 274, p. 131–140. Full text in Research Archive
• Maleki, Atoosa; Lafitte, Geraldine; Kjøniksen, Anna-Lena; Thuresson, Krister & Nyström, Bo (2008). Effect of pH on the association behavior in aqueous solutions of pig gastric mucin. Carbohydrate Research. ISSN 0008-6215. 343, p. 328–340. doi: 10.1016/j.carres.2007.10.005. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2007). Characterization of Interactions in Aqueous mixtures of Hydrophobically Modified Alginate and Different Types of Surfactant. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 293, p. 105–113. doi: 10.1016/j.colsurfa.2006.07.028. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Anomalous Viscosity Behavior in Aqueous Solutions of Hyaluronic Acid. Polymer Bulletin. ISSN 0170-0839. 59, p. 217–226. doi: 10.1007/s00289-007-0760-2. Full text in Research Archive
• Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Effects of beta-cyclodextrin and beta-cyclodextrin polymer addition and temperature on the modulation of hydrophobic interactions in aqueous solutions of two hydrophobically modified biopolymers. Journal of Non-Crystalline Solids. ISSN 0022-3093. 353, p. 3906–3914. doi: 10.1016/j.jnoncrysol.2007.03.028. Full text in Research Archive
• Silioc, Cristelle; Maleki, Atoosa; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Effect of Hydrophobic Modification on Rheological and Swelling Features during Chemical Gelation of Aqueous Hydroxyethylcellulose. Biomacromolecules. ISSN 1525-7797. 8(2), p. 719–728. Full text in Research Archive
• Zhu, Kaizheng; Jin, Huiting; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Anomalous Transition in Aqueous Solutions of a Thermoresponsive Amphiphilic Diblock Copolymer. Journal of Physical Chemistry B. ISSN 1520-6106. 111, p. 10862–10872. doi: 10.1021/jp074163m. Full text in Research Archive
• Cifre, J. G. Hernándes; Pamies, Ramón; Kjøniksen, Anna-Lena; Knudsen, Kenneth D; Nyström, Bo & Torre, José Gracía de la (2007). Brownian dynamics simulation of reversible polymer networks using a non-interacting bead-and-spring chain model. Journal of Non-Newtonian Fluid Mechanics. ISSN 0377-0257. 146, p. 3–10. doi: 10.1016/j.jnnfm.2006.08.010. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Characterization of the Chemical Degradation of Hyaluronic Acid during Chemical Gelation in the Presence of Different Cross-linker Agents. Carbohydrate Research. ISSN 0008-6215. 342, p. 2776–2792. doi: 10.1016/j.carres.2007.08.021. Full text in Research Archive
• Maleki, Atoosa; Beheshti, Neda; Zhu, Kaizheng; Nyström, Bo & Kjøniksen, Anna-Lena (2007). Shrinking of Chemically Cross-linked Polymer Networks in the Postgel Region. Polymer Bulletin. ISSN 0170-0839. 58, p. 435–445. doi: 10.1007/s00289-006-0673-5. Full text in Research Archive
• Galant, Céline; Kjøniksen, Anna-Lena; Nguyen, Tran Minh Giao; Knudsen, Kenneth D. & Nyström, Bo (2006). Altering Associations in Aqueous Solutions of a Hydrophobically Modified Alginate in the Presence of Beta-Cyclodextrin Monomers. Journal of Physical Chemistry B. ISSN 1520-6106. 110(1), p. 190–195. Full text in Research Archive
• Burckbuchler, Virginie; Kjøniksen, Anna-Lena; Galant, Céline; Lund, Reidar; Amiel, Catherine & Knudsen, Kenneth Dahl [Show all 7 contributors for this article] (2006). Rheological and Structural Characterization of the Interactions between Cyclodextrin Compounds and Hydrophobically Modified Alginate. Biomacromolecules. ISSN 1525-7797. 7, p. 1871–1880. Full text in Research Archive
• Baldursdottir, Stefania; Kjøniksen, Anna-Lena & Nyström, Bo (2006). The Effect of Riboflavin-Photoinduced Degradation of Alginate Matrices on the Diffusion of Poly(oxyethylene) Probes in the Polymer Network. European Polymer Journal. ISSN 0014-3057. 42, p. 3050–3058. Full text in Research Archive
• Holst, Petter Stang; Kjøniksen, Anna-Lena; Huaitian, Bu; Sande, Sverre Arne & Nyström, Bo (2006). Rheological Properties of pH-Induced Association and Gelation of Pectin. Polymer Bulletin. ISSN 0170-0839. 56(2-3), p. 239–246. Full text in Research Archive
• Beheshti, Neda; Nguyen, Tran Minh Giao; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2006). Structure and Dynamics of Aqueous Mixtures of an Anionic Cellulose Derivative and Anionic or Cationic Surfactants. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 279(1-3), p. 40–49. Full text in Research Archive
• Tho, Ingunn; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2006). Effect of Solvent Composition on the Association Behavior of Pectin in Methanol-Water Mixtures. European Polymer Journal. ISSN 0014-3057. 42(5), p. 1164–1172. Full text in Research Archive
• Werner, B; Huaitian, Bu; Kjøniksen, Anna-Lena; Sande, Sverre Arne & Nyström, Bo (2006). Characterization of Gelation of Aqueous Pectin via the Ugi Multicomponent Condensation Reaction. Polymer Bulletin. ISSN 0170-0839. 56(6), p. 579–589. Full text in Research Archive
• Beheshti, Neda; Huaitian, Bu; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Pamies, Ramón [Show all 9 contributors for this article] (2006). Characterization of Interactions in Aqueous Solutions of Hydroxyethylcellulose and Its Hydrophobically Modified Analogue in the Presence of a Cyclodextrin Derivative. Journal of Physical Chemistry B. ISSN 1520-6106. 110(13), p. 6601–6608. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2006). Dynamical and Structural Behaviors of Hydroxyethylcellulose Hydrogels Obtained by Chemical Gelation. Polymer international. ISSN 0959-8103. 55(3), p. 365–374. Full text in Research Archive
• Burckbuchler, Virginie; Kjøniksen, Anna-Lena; Galant, Céline; Lund, Reidar; Amiel, Catherine & Knudsen, Kenneth D. [Show all 7 contributors for this article] (2006). Rheological and Structural Characterization of the Interactions between Cyclodextrin Compounds and Hydrophobically Modified Alginate. Biomacromolecules. ISSN 1525-7797. 7, p. 1871–1878. Full text in Research Archive
• Huaitian, Bu; Nguyen, Tran Minh Giao & Kjøniksen, Anna-Lena (2006). Effects of the Quantity and Structure of Hydrophobes on the Properties of Hydrophobically Modified Alginates in Aqueous Solutions. Polymer Bulletin. ISSN 0170-0839. 57, p. 563–574. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena; Elgsaeter, Arnljot & Nyström, Bo (2006). Interaction of Unmodified and Hydrophobically Modified Alginate with Sodium Dodecyl Sulfate in Dilute Aqueous Solution. Calorimetric, Rheological and Turbidity Studies. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 278(1-3), p. 166–174. Full text in Research Archive
• Bu, H; Naess, Stine N; Næss, Stine Nalum; Beheshti, Neda; Beheshti, N & Zhu, KZ [Show all 12 contributors for this article] (2006). Characterization of thermally sensitive interactions in aqueous mixtures of hydrophobically modified hydroxyethylcellulose and cyclodextrins. Langmuir. ISSN 0743-7463. 22, p. 9023–9029. Full text in Research Archive
• Thorgeirsdottir, Thorunn O.; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Kristmundsdottir, Thordis & Nyström, Bo (2005). Viscoelastic and Structural Properties of Pharmaceutical Hydrogels Containing Monocaprin. European journal of pharmaceutics and biopharmaceutics. ISSN 0939-6411. 59(2), p. 333–342. Full text in Research Archive
• Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2005). Phase Separation and Structural Properties of Semidilute Aqueous Mixtures of Ethyl(hydroxyethyl)cellulose and an Ionic Surfactant. European Polymer Journal. ISSN 0014-3057. 41(9), p. 1954–1964. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2005). Effects of Surfactant and Temperature on Rheological and Structural Properties of Semidilute Aqueous Solutions of Unmodified and Hydrophobically Modified Alginate. Langmuir. ISSN 0743-7463. 21(24), p. 10923–10930. Full text in Research Archive
• Kjøniksen, Anna-Lena; Galant, Céline; Knudsen, Kenneth D.; Nguyen, Tran Minh Giao & Nyström, Bo (2005). Effects of beta-Cyclodextrin Addition and Temperature on the Modulation of Hydrophobic Interactions in Aqueous Solutions of an Associative Alginate. Biomacromolecules. ISSN 1525-7797. 6(6), p. 3129–3136. Full text in Research Archive
• Nordby, Marianne Hiorth; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Sande, Sverre Arne & Nyström, Bo (2005). Structural and Dynamical Properties of Aqueous Mixtures of Pectin and Chitosan. European Polymer Journal. ISSN 0014-3057. 41(8), p. 1718–1728. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2005). Effect of Shear on Intramolecular and Intermolecular Association during Cross-Linking of Hydroxyethylcellulose in Dilute Aqueous Solutions. Journal of Physical Chemistry B. ISSN 1520-6106. 109(25), p. 12329–12336. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena & Nyström, Bo (2005). Effects of pH on Dynamics and Rheology during Association and Gelation via the Ugi Reaction of Aqueous Alginate. European Polymer Journal. ISSN 0014-3057. 41(8), p. 1708–1717. Full text in Research Archive
• Galant, Céline; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Helgesen, Geir; Lund, Reidar & Laukkanen, Antti [Show all 8 contributors for this article] (2005). Physical Properties of Aqueous Solutions of a Thermo-Responsive Neutral Copolymer and an Anionic Surfactant: Turbidity and Small-Angle Neutron Scattering Studies. Langmuir. ISSN 0743-7463. 21(17), p. 8010–8018. Full text in Research Archive
• Kjøniksen, Anna-Lena; Laukkanen, Antti; Galant, Céline; Knudsen, Kenneth D.; Tenhu, Heikki & Nyström, Bo (2005). Association in Aqueous Solutions of a Thermo-Responsive PVCL-g-C11EO42 Copolymer. Macromolecules. ISSN 0024-9297. 38(3), p. 948–960. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nordby, Marianne Hiorth & Nyström, Bo (2005). Association under Shear Flow in Aqueous Solutions of Pectin. European Polymer Journal. ISSN 0014-3057. 41, p. 761–770. Full text in Research Archive
• Baldursdottir, Stefania & Kjøniksen, Anna-Lena (2005). Rheological Characterization and Turbidity of Riboflavin-Photosensitized Changes in Alginate/GDL Systems. European journal of pharmaceutics and biopharmaceutics. ISSN 0939-6411. 59(3), p. 501–510. Full text in Research Archive
• Kjøniksen, Anna-Lena; Hiorth, Marianne & Nyström, Bo (2004). Temperature-induced association and gelation of aqueous solutions of pectin. A dynamic light scattering study. European Polymer Journal. ISSN 0014-3057. 40, p. 2427–2435. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena & Nyström, Bo (2004). Rheological characterization of photochemical changes of ethyl(hydroxyethyl)cellulose dissolved in water in the presence of an ionic surfactant and a photosensitizer. Biomacromolecules. ISSN 1525-7797. 5, p. 610–617. Full text in Research Archive
• Kjøniksen, Anna-Lena; Baldursdottir, Stefania & Nyström, Bo (2004). Characterization of riboflavin-photosensitized changes in aqueous solutions of alginate by dynamic light scattering. Macromolecular Bioscience. ISSN 1616-5187. 4, p. 76–83. Full text in Research Archive
• Knudsen, Kenneth D.; Lauten, Rolf Andreas; Kjøniksen, Anna-Lena & Nyström, Bo (2004). Rheological and structural properties of aqueous solutions of a hydrophobically modified polyelectrolyte and its unmodified analogue. European Polymer Journal. ISSN 0014-3057. 40, p. 721–733. Full text in Research Archive
• Huaitian, Bu; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2004). Rheological and structural properties of aqueous alginate during gelation via the Ugi multicomponent condensation reaction. Biomacromolecules. ISSN 1525-7797. 5, p. 1470–1479. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo & Tenhu, Heikki (2003). Characterisation of Thermally Controlled Chain Association in Aqueous Solutions of Poly(N-isopropyl acrylamide)-g-poly(ethylene oxide) Dynamic Light Scattering. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 228, p. 75–83. Full text in Research Archive
• Tho, Ingunn; Kjøniksen, Anna-Lena; Nyström, Bo & Roots, Jaan (2003). Characterization of Associations and Gelation of Pectin in Methanol-Water Mixtures. Biomacromolecules. ISSN 1525-7797. 4(6), p. 1623–1629. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nordby, Marianne Hiorth; Roots, Jaan & Nyström, Bo (2003). Shear-Induced Association and Gelation of Aqueous Solutions of Pectin. Journal of Physical Chemistry B. ISSN 1520-6106. 107(26), p. 6324–6328. Full text in Research Archive
• Baldursdottir, Stefania; Kjøniksen, Anna-Lena; Roots, Jaan; Tønnesen, Hanne Hjorth & Nyström, Bo (2003). Influence of Concentration and Molecular Weight on the Photosensitized Degradation in Aqueous Alginate Solutions. Polymer Bulletin. ISSN 0170-0839. 50(5-6), p. 373–380. Full text in Research Archive
• Baldursdottir, Stefania; Kjøniksen, Anna-Lena; Karlsen, Jan; Nyström, Bo; Tønnesen, Hanne Hjorth & Roots, Jaan (2003). Riboflavin-Photosensitized Changes in Aqueous Solutions of Alginate. Rheological Studies. Biomacromolecules. ISSN 1525-7797. 4(2), p. 429–436. Full text in Research Archive
• Nordby, Marianne Hiorth; Kjøniksen, Anna-Lena; Nyström, Bo & Roots, Jaan (2003). Thermoreversible Gelation of Aqueous Mixtures of Pectin and Chitosan. Rheology. Biomacromolecules. ISSN 1525-7797. 4(2), p. 337–343. Full text in Research Archive
• Lauten, Rolf Andreas; Marstokk, Olav; Kjøniksen, Anna-Lena & Nyström, Bo (2002). Dynamics in aqueous solutions of poly(vinyl alcohol) and its hydrophobically modified anionic analogues. Polymer Bulletin. ISSN 0170-0839. 49(4), p. 281–288. Full text in Research Archive
• Lauten, Rolf Andreas; Kjøniksen, Anna-Lena & Nyström, Bo (2001). Colloid polymer interactions and aggregation in aqueous mixtures of polystyrene latex, sodium dodecyl sulfate, and a hydrophobically modified polymer. A dynamic light scattering study. Langmuir. ISSN 0743-7463. 17, p. 924–930. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nilsson, Susanne; Thuresson, Krister; Lindman, Björn & Nyström, Bo (2000). Effect of surfactant on dynamic and viscoelastic properties of aqueous solutions of hydrophobically modified ethyl(hydroxyethyl)cellulose, with and without spacer. Macromolecules. ISSN 0024-9297. 33(3), p. 877–886. Full text in Research Archive
• Lauten, Rolf Andreas; Kjøniksen, Anna-Lena & Nyström, Bo (2000). Adsorption and desorption of unmodified and hydrophobically modified ethyl(hydroxyethyl)cellulose on polystyrene latex particles in the presence of ionic surfactants using dynamic light scattering. Langmuir. ISSN 0743-7463. 16(10), p. 4478–4484. Full text in Research Archive
• Kjøniksen, Anna-Lena; Joabsson, Fredrik; Thuresson, Krister & Nyström, Bo (1999). Salt-induced aggregation of polystyrene latex particles in aqueous solutions of a hydrophobically modified nonionic cellulose derivative and its unmodified analogue. Journal of Physical Chemistry B. ISSN 1520-6106. 103(45), p. 9818–9825. Full text in Research Archive
• Thuresson, Krister; Nilsson, Susanne; Kjøniksen, Anna-Lena; Walderhaug, Harald; Lindman, Björn & Nyström, Bo (1999). Dynamics and rheology in aqueous solutions of associating diblock and triblock copolymers of the same type. Journal of Physical Chemistry B. ISSN 1520-6106. 103(9), p. 1425–1436. Full text in Research Archive
• Nyström, Bo; Kjøniksen, Anna-Lena & Iversen, Christian (1999). Characterization of association phenomena in aqueous systems of chitosan of different hydrophobicity. Advances in Colloid and Interface Science. ISSN 0001-8686. 79, p. 81–103. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo & Lindman, Björn (1999). Dynamic light scattering on semidilute aqueous systems of ethyl(hydroxyethyl)cellulose. Effects of temperature, surfactant, concentration, and salinity. Colloids and Surfaces A: Physicochemical and Engineering Aspects. ISSN 0927-7757. 149, p. 347–354. Full text in Research Archive
• Ostrovskii, Denis; Kjøniksen, Anna-Lena; Nyström, Bo & Torell, Lena (1999). Associations and thermal gelation in aqueous mixtures of ethyl(hydroxyethyl)cellulose and ionic surfactant: FTIR and Raman study. Macromolecules. ISSN 0024-9297. 32(5), p. 1534–1540. Full text in Research Archive
• Tsianou, Marina; Kjøniksen, Anna-Lena; Thuresson, Krister & Nyström, Bo (1999). Light scattering and viscoelasticity in aqueous mixtures of oppositely charged and hydrophobically modified polyelectrolytes. Macromolecules. ISSN 0024-9297. 32(9), p. 2974–2982. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo & Lindman, Björn (1998). Dynamic viscoelasticity of gelling and nongelling mixtures of ethyl(hydroxyethyl)cellulose and an ionic surfactant. Macromolecules. ISSN 0024-9297. 31, p. 1852–1858. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo & Lindman, Björn (1998). Effects of temperature, surfactant concentration, and salinity on the dynamics of dilute solutions of a nonionic cellulose derivative. Langmuir. ISSN 0743-7463. 14, p. 5039–5045. Full text in Research Archive
• Kjøniksen, Anna-Lena; Iversen, Christian; Nyström, Bo; Nakken, Torgeir & Palmgren, Odd (1998). Light scattering study of semidilute aqueous systems of chitosan and hydrophobically modified chitosans. Macromolecules. ISSN 0024-9297. 31, p. 8142–8148. Full text in Research Archive
• Iversen, Christian; Nakken, Torgeir; Kjøniksen, Anna-Lena; Nyström, Bo; Palmgren, Odd & Tande, Terje (1997). Linear and nonlinear rheological responses in aqueous systems of hydrophobically modified chitosan and its unmodified analogue. Polymer Bulletin. ISSN 0170-0839. 39, p. 747–754. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo; Iversen, Christian; Nakken, Torgeir; Palmgren, Odd & Tande, Terje (1997). Viscosity of dilute solutions of hydrophobically modified chitosan and its unmodified analogue at different conditions of salt and surfactant concentrations. Langmuir. ISSN 0743-7463. 13(19), p. 4948–4952. Full text in Research Archive
• Walderhaug, Harald; Kjøniksen, Anna-Lena & Nyström, Bo (1997). Diffusion of poly(ethylene oxide) chains in gelling and nongelling aqueous mixtures of ethyl(hydroxyethyl)cellulose and a surfactant by pulsed field gradient NMR. Journal of Physical Chemistry B. ISSN 1520-6106. 101(44), p. 8892–8897. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nyström, Bo; Nakken, Torgeir; Palmgren, Odd & Tande, Terje (1997). Effect of surfactant concentration, pH and shear rate on the rheological properties of aqueous systems of a hydrophobically modified chitosan and its unmodified analogue. Polymer Bulletin. ISSN 0170-0839. 38, p. 71–79. Full text in Research Archive
• Nyström, Bo & Kjøniksen, Anna-Lena (1997). Dynamic light scattering of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer in water. Langmuir. ISSN 0743-7463. 13(17), p. 4520–4526. Full text in Research Archive
• Nyström, Bo; Kjøniksen, Anna-Lena & Lindman, Björn (1996). Effects of Temperature, Surfactant, and Salt on the Rheological Behavior in Semidilute Aqueous Systems of a Nonionic Cellulose Ether. Langmuir. ISSN 0743-7463. 12(13), p. 3233–3240. Full text in Research Archive
• Kjøniksen, Anna-Lena & Nyström, Bo (1996). Dynamic Light Scattering of Chemically Cross-linked Poly(vinyl alcohol)During the Gelation Process. Macromolecules. ISSN 0024-9297. 29(22), p. 7116–7123. Full text in Research Archive
• Kjøniksen, Anna-Lena & Nyström, Bo (1996). Effects of Polymer Concentration and Crosslinking Density on Rheology of Chemically Cross-Linked Poly(vinyl alcohol) Near the Gelation Threshold. Macromolecules. ISSN 0024-9297. 29(15), p. 5215–5222. Full text in Research Archive

View all works in NVA

• Kjøniksen, Anna-Lena (2026). The pathway to interdisciplinary research. Full text in Research Archive
• Biedacha, Maciej; Tellnes, Lars G. F. & Kjøniksen, Anna-Lena (2026). pLCA Scenario Based Production Pathways of Mycelia-Wood Bio-Composite. doi: https:/wsenetwork.org/plca-scenario-based-production-pathways-of-mycelia-wood-bio-composite/. Full text in Research Archive Show summary

  Novel bio-based construction materials and phase-change materials (PCMs) have attracted increasing attention due to their potential to reduce operational energy demand and improve building sustainability, and the potential to enlarge anthropogenic carbon sinks (Livne et al., 2022, Hawkins et al., 2023). However, current studies mainly assess their environmental performance through conventional life cycle assessment (LCA) based on laboratory-scale data. This approach has important limitations and may overlook environmental impacts associated with full-scale production (Alaux et al., 2024, Sacchi et al., 2022). To address this gap, this study applies a prospective, ex-ante LCA framework to evaluate the environmental performance of a novel bio-based composite.

• Tellnes, Lars G. F.; Biedacha, Maciej & Kjøniksen, Anna-Lena (2026). Valuation of carbon storage in public procurement. doi: https:/wsenetwork.org/valuation-of-carbon-storage-in-public-procurement/. Full text in Research Archive
• Tellnes, Lars G. F.; Pamies, Ramon Francisco Porras & Kjøniksen, Anna-Lena (2025). Environmental Performance Indicators for Circular business models based on Eco-efficiency: Cases on New business models and Product-service systems. Full text in Research Archive
• Kjøniksen, Anna-Lena (2025). Tunable and Durable Seawater Adhesives (SEAD). Full text in Research Archive
• Tellnes, Lars G. F.; Svanes, Erik; Hognes, Erik Skontorp & Kjøniksen, Anna-Lena (2024). Footprint for environmentally sustainable foods –case on tunicate burger. Full text in Research Archive
• Tellnes, Lars G. F.; Svanes, Erik; Lyng, Kari-Anne Kallerud & Kjøniksen, Anna-Lena (2024). Local Impact Assessment and Valuation of Tunicate Farming. Full text in Research Archive
• Tellnes, Lars G. F.; Birkeland, Marius; Kjøniksen, Anna-Lena; Røer, Henrik Skyrud & Sanfèlix, Susana G. (2024). Economic and carbon footprint assessment for energy upgrading of buildings. Scenarios for a combined warehouse and office building in Norway. Full text in Research Archive
• Kjøniksen, Anna-Lena (2024). Tunable and Durable Seawater Adhesives. Full text in Research Archive
• Kjøniksen, Anna-Lena (2024). Tunable and Durable Seawater Adhesives. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Wu, Hong & Kjøniksen, Anna-Lena (2023). LCA for circular business model – five step method and experiences from Norway. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Andersson, Gunnar & Kjøniksen, Anna-Lena (2023). Three perspectives of LCA for business models innovation – case studies on rental of products. Full text in Research Archive
• Tellnes, Lars G. F.; Næss, Johann Kristian; Kjøniksen, Anna-Lena & Ross, Lone (2023). Carbon footprint of reused and recycled wood products. Full text in Research Archive
• Kjøniksen, Anna-Lena (2023). Morran i Østfold - Hvorfor fikk vi ikke lyspæra til å virke? [Radio]. NRK Radio - Distriktprogram Østfold. Full text in Research Archive
• Kjøniksen, Anna-Lena (2023). Abels Tårn. [Radio]. NRK Radio. Full text in Research Archive
• Kjøniksen, Anna-Lena (2023). Abels Tårn. [Radio]. NRK Radio. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Koch, Christian; Torgersen, Mirielle & Kjøniksen, Anna-Lena (2023). Value capture from low embodied emissions of buildings a business model innovation perspective. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid & Kjøniksen, Anna-Lena (2023). Metrics for absolute environmentally sustainable foods – case on tunicate burger. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Pamies, Ramon Francisco Porras; Kjøniksen, Anna-Lena & Næss, Johann K (2023). Declaring environmental performance with reuse and recycling business approaches for small and medium sized enterprises. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid; Kjøniksen, Anna-Lena & Pamies, Ramon Francisco Porras (2023). Life cycle assessment of tunicate burger. Full text in Research Archive
• Kjøniksen, Anna-Lena & Tellnes, Lars Gunnar Furelid (2022). Action case studies as method for industrial work integrated learning. Full text in Research Archive
• Tellnes, Lars Gunnar Furelid & Kjøniksen, Anna-Lena (2022). Perspectives of evaluating product service systems with life cycle assessment a case study on power tool rental. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). HIØ-professor fikk kinesisk pris for utvikling av månebetong med urin. [Journal]. Fredriksstad Blad. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Urin als Baustoff für den Mond. [Journal]. MIT Technology Review science magazine's German edition. Full text in Research Archive
• Kjøniksen, Anna-Lena (2020). Morran i Østfold - Forsker i Østfold skal lage betong på månen! [Radio]. NRK P1, Østfold. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Building a Moon Base. [Journal]. Double Helix. Full text in Research Archive
• Kjøniksen, Anna-Lena (2020). Mellom himmel og jord. [Radio]. NRK Radio. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2020). Urin kan bli byggemateriale på månen. [Internet]. Norsk Romsenter. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Making moon space bases with urine. [Journal]. Materials World. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). On the Moon, Astronaut Pee Will Be a Hot Commodity. [Journal]. Wierd. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Astronaut urine for building a Moon base. [Journal]. Science & Exploration. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2020). L'urine d'astronautes pourrait être utilisée pour créer du 'béton spatial'. [Journal]. Business Insider France. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Urine luck: Astronauts’ pee could be the secret ingredient to future moon bases. [Journal]. Digital Trends. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2020). Astronauts may be able to make cement using their own pee. [Journal]. Science News. Full text in Research Archive
• Avilés, María-Dolores; Cao, Vinh Duy; Sánchez, Cristian; Arias-Pardilla, Joaquín; Carrión-Vilches, Francisco-José & Sanes, José [Show all 9 contributors for this article] (2020). Corrigendum to “Effect of temperature on the rheological behavior of a new aqueous liquid crystal bio-lubricant”. Journal of Molecular Liquids. ISSN 0167-7322. 303. doi: 10.1016/j.molliq.2020.112645. Full text in Research Archive
• Kjøniksen, Anna-Lena; Pamies, Ramon Francisco Porras & Pilehvar, Shima (2020). Astronaut urine to build moon bases. [Journal]. Sinc Technology. Full text in Research Archive
• Kjøniksen, Anna-Lena; Pilehvar, Shima; Valentini, Luca; Arnhof, Marlies & Pamies, Ramon Francisco Porras (2020). Geopolymers from Lunar Regolith for Building on the Moon. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2020). Basalt fiber reinforced geopolymer for construction on the Moon. Full text in Research Archive
• Kjøniksen, Anna-Lena & Dursun, Kamil Mustafa (2020). Starter Master i Grønn Energiteknologi. [Journal]. Energi Utdanning. Full text in Research Archive
• Kjøniksen, Anna-Lena (2020). Norsk forskning: Vil bruke astronaut-urin til å blande månebetong. [Journal]. ABC nyheter. Full text in Research Archive
• Kjøniksen, Anna-Lena (2020). Månedrømmen. [TV]. Lørdagsevyen, NRK. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2020). Recent research into urea as a plasticizer for concrete on the Moon. Double Helix magazine. Full text in Research Archive
• Kjøniksen, Anna-Lena; Pilehvar, Shima & Arnhof, Marlies (2019). Building a Base on the Moon? New Research in Regolith Concrete. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Cao, Vinh Duy; Pilehvar, Shima; Sanfèlix, Susana G. & Szczotok-Piechaczek, Anna Maria (2019). Advanced Materials - From drug delivery by energy technology to 3D-printing concrete on the Moon. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Sanfèlix, Susana G.; Pilehvar, Shima; Szczotok-Piechaczek, Anna Maria & Cao, Vinh Duy (2019). Advanced Materials - From drug delivery by energy technology to 3D-printing concrete on the Moon. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2019). Atmospheric electricity in Hessdalen valley, Norway. Full text in Research Archive Show summary

  At fair weather conditions, atmospheric electricity of interesting magnitudes has been observed in Hessdalen, Norway. In this area, transient luminous phenomena have been observed in the low atmosphere for several decades. Light balls of different shapes and color, with a life time from seconds up to two hours have been reported. Electrical field mills have been utilized to measure the static electrical field in the low atmosphere at two mountain tops, Skarvan at an altitude of 975 m and Finså at 1040 m. These mountains are spaced 5.5 km apart along a north-south axis. Data from September 2017 show a buildup of static charge of more than 15kV/m under fair weather conditions while the voltage difference between the two mountain tops exceed 20kV/m. In this area, NGU, the national institution for the study of bedrock, mineral resources, surficial deposits and groundwater, warns for high levels of Radon. Data from September 2017 shows that the radioactivity at Finså mountain increases when the electric field decrease to -5kV/m, while radioactivity levels at Skarvan stays unchanged at low level despite of the increase to over 15kV/m. Just before, at 23:44, a light is seen from Finså towards south which lasts for 8 minutes. The light emerges in a desolated area and gives a continuous optical spectrum, making it a possible observation of the Hessdalen phenomena. Observation area is marked yellow in the map.

• Kjøniksen, Anna-Lena & Pilehvar, Shima (2019). Urin kan være løsningen for månebetong. [Journal]. forskning.no. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2019). Dette testhuset skal løse lysmysteriet. [Journal]. Teknisk ukeblad. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2019). Science Camp i Hessdalen. [Internet]. NEARADIO. Full text in Research Archive Show summary

  I femten år har studenter fra Høgskolen i Østfold inntatt Hessdalsfjellene. I helga avsluttet de sin to ukers lange høsttur, og for første gang ble den nye basestasjonen på Skarven tatt i bruk.

• Kjøniksen, Anna-Lena (2019). Utvikler norsk betong som skal brukes til å bygge på månen. [Journal]. Teknisk Ukeblad. Full text in Research Archive
• Kjøniksen, Anna-Lena (2019). Anna-Lena og Shima utvikler månebetong. [Journal]. Fredriksstad Bld. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2019). Gjennombruddet kom da måneforskerne tilsatte urin. [Internet]. NRK Østfold. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2019). Forsker på Månebetong. [TV]. NRK Distrikstnyheter Østfold. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2018). Bygger forskningsstasjon i Hessdalen. Forskere skal overvåke det mystiske lysfenomenet i fjellbygda. [Journal]. Adresseavisen. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2018). Mystisk lys øker forståelse for realfag. [Internet]. HiØ nettsider. Full text in Research Archive Show summary

  https://blogg.hiof.no/hva-skjer-a/

• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2018). Are the transient luminous phenomena in Hessdalen (Norway) related to build-up of static charge in the low atmosphere? Full text in Research Archive
• Santacruz, Isabel; Romero-Espinosa, A.; Sanfèlix, Susana G.; Cuesta, A; Torre, Ángeles G. De la & Kjøniksen, Anna-Lena [Show all 7 contributors for this article] (2018). Processing and characterisation of calcium sulphoaluminate ecocements containing Microencapsulated Phase Change Materials. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2018). Norske forskere utvikler månebetong. [Internet]. NRK Østfold. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2018). Herfra skal de endelig løse gåten bak lysene i Hessdalen. [Internet]. NRK Trøndelag. Full text in Research Archive
• Kjøniksen, Anna-Lena (2018). Forskere skal lage månebetong. [Journal]. forskning.no. Full text in Research Archive
• Kjøniksen, Anna-Lena (2018). Forskere fra Østfold bygger ut på Månen. [Radio]. NRK Radio, Distriktsprogram - Østfold. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2018). Si ja til livet, si ja til månebetong! [Radio]. NRK Radio - Distriktsprogran Østfold - Eftan i Østfold. Full text in Research Archive
• Kjøniksen, Anna-Lena (2018). Betong fra Østfold skal til Månen! [Radio]. NRK Radio, Distriktsprogram - Østfold. Full text in Research Archive
• Kjøniksen, Anna-Lena & Pilehvar, Shima (2018). Det lages betong til månen i Østfold. [Radio]. NRK Radio - Distriktsprogran Østfold - Eftan i Østfold. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2018). Ein ungewöhnliches Naturphänomen gibt Forschern Rätsel auf. Das Polarlicht ist nicht das einzige Lichtphänomen im hohen Norden: In Hessdalen in Norwegen fliegen unheimliche Lichtbälle durch den Himmel. Der Ingenieur Bjørn Gitle Hauge sucht mit Forscherkollegen nach einer Erklärung. [Internet]. higgs. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2017). Development of a Horizon 2020 FET project. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2017). Development of a Horizon 2020 FET project. Full text in Research Archive
• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter (2017). Optical luminosity of the transient luminous phenomena in Hessdalen, Norway. Full text in Research Archive Show summary

  Transient luminous phenomena has been observed in the low atmosphere over Hessdalen valley for several decades, first report is claimed to be 200 years old. The area is scattered with old copper, zinc, sulphur and iron mines. The river Hesja divides the valley, running south to north. The river descends from 800 m altitude to 600m. In the middle of the valley, an old copper and sulphur mine feeds the river with its acidic sulphur pollution. Eyewitnesses have reported lights emerging from the river, but most reports are of lights suddenly emerging in low altitudes over the valley, 1000m – 2000m altitude. Common colours are white, yellow, orange and blue. Green is absent. The optical spectrum of the white lights has been obtained several times, indicating a continuous spectrum. The luminosity of the Hessdalen lights has been debated, some speculating that the phenomenon´s radiant power reaches up to 1MW. A more moderate calculation done by Teodorani in 2004 suggests 19KW. The cause of the huge difference is du to uncertainty in establishing correct distance to the phenomenon. Recent discoveries done by this team, indicates that the radiant power is usually much lower. For the first time in Hessdalen, pictures with optical spectrums was obtained at a distance not more than 300m. Two similar observations were done from the same position, indicating a possible birthplace. Atmospheric data and spectrum analysis was also coinciding. Data from this short distance observation will be presented.

• Szczotok-Piechaczek, Anna Maria; Serrano, A.; Carmona, Manuel; Kjøniksen, Anna-Lena & Rodriguez, Juan F. (2017). Development of thermoregulating microcapsules having flame retardant properties for building applications. Full text in Research Archive
• Kjøniksen, Anna-Lena (2017). Vil ha ned plastforbruket. [Radio]. NRK Østfold. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2017). Hessdalen – et forskningsområde for de få? [Internet]. NRK Trøndelag. Full text in Research Archive
• Pilehvar, Shima; Kjøniksen, Anna-Lena; Szczotok, Anna M. & Pamies, Ramon Francisco Porras (2017). The Effect of Micro-encapsulated Phase Change Materials on the Properties of Geopolymer and Portland Cement Concrete. Full text in Research Archive
• Szczotok-Piechaczek, Anna Maria; Kjøniksen, Anna-Lena; Carmona, Manuel & Rodriguez, Juan F. (2017). Development of thermoregulating microcapsules with cyclotriphosphazene as a flame retardant agent. Full text in Research Archive
• Sanfèlix, Susana G.; Santacruz, Isabel; Szczotok-Piechaczek, Anna Maria; Ordonez, Luis M.; Torre, Angeles G. De la & Kjøniksen, Anna-Lena (2017). Rheological performance of cement composites with Microencapsulated Phase Change Materials. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Salas-Bringas, Carlos; Szczotok, Anna M. & Kjøniksen, Anna-Lena (2017). Smart Geopolymer Concrete Containing Microencapsulated Phase Change Materials for Passive Building Applications. Full text in Research Archive
• Cao, Vinh Duy; Pilehvar, Shima; Carlos, Salas Bringas; Szczotok, Anna M. & Kjøniksen, Anna-Lena (2017). The Effect of Microcapsulated Phase Change Materials on Thermal and Mechanical properties of Geopolymer Concrete. Full text in Research Archive Show summary

  The energy consumption for heating and cooling of buildings increases every year. Improved t material technology can help reducing the energy consumption needed to keep a comfortable indoor temperature. By integrating microencapsulated phase change materials (MPCM), which has a very high energy storage capacity within the phase transition temperature, the energy storage capacity of concrete can be significantly improved. This will facilitate improved passive building technology with reduced the energy consumption. Geopolymer concrete (GPC) is synthesized by alkali activation of aluminosilicate materials in amorphous form (industrial waste). Geopolymer concrete is much more environmentally friendly than Portland cement concrete, which has a negative effect on the environment due to emission of huge amounts of CO2. Therefore, the integration of MPCM to GPC provides a promising environmentally friendly material with a high energy storage capacity. However, knowledge regarding the effect of MPCM on the thermal and mechanical properties of geopolymer concrete is very limited. In this study, high thermal energy storage capacity materials were fabricated by mixing MPCM into geopolymer concrete (GPC). The effect of different type and concentration of MPCM on improving the thermal properties of GPC has been examined. Furthermore, the negative effect on the compressive strength of geopolymer concrete received special attention. Optimizing the effect of MPCM on geopolymer concrete to improve thermal properties and maintain the compressive strength of the geopolymer concrete at an acceptable level for building application is the main target of this study.

• Pilehvar, Shima & Kjøniksen, Anna-Lena (2016). The Effect of Micro-encapsulated Phase Change Materials in Liquid State on Properties of Geopolymer and Portland Cement Concrete. Full text in Research Archive
• Hauge, Bjørn Gitle; Strand, Erling Petter & Kjøniksen, Anna-Lena (2016). Vil bygge forskningsstasjon i Hessdalen. [Internet]. NEA Radio. Full text in Research Archive Show summary

  Hessdalen bærekraftige forskningsstasjon søker det interkommunale næringsfondet om midler til etablering av en forskningsstasjon på fjellet i Hessdalen.

• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2016). Hessdalsfenomenet. [TV]. NRK Distriktsnyheter Midtnytt . Full text in Research Archive Show summary

  Hessdalsfenomenet bekreftes av forskere under Science Camp 2016

• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter (2016). Hessdalen blir bachelorstudie. [Internet]. NEA Radio. Full text in Research Archive Show summary

  Høyskolen i Østfold HiØ tilbyr fra neste høst et studie i feltforskning, der deler av opplegget er lagt til Hessdalen. Studiet er valgfag i alle bachelorstudier i ingeniørfag, og i innovasjon og prosjektledelse. Allerede denne høsten vil den årlige Science Campen i Hessdale fungere som et teststudie for de norske og svenske elevene som deltar. Årets Science Camp foregår fra 5. – 16- september.

• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2016). Marzo 2016. RILANCIO COLLABORAZIONE ITALO-NORVEGESE PER IL PROJECT HESSDALEN. [Internet]. IL LABORATORIO DELLE ANOMALIE. Full text in Research Archive
• Kjøniksen, Anna-Lena (2016). Vinn eller forsvinn. [Journal]. Forskerforum. Full text in Research Archive
• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Strand, Erling Petter & Andersson, Gunnar (2016). IR + Olav Thon = Sant ! [Internet]. HiØ Fou blogg. Full text in Research Archive
• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Strand, Erling Petter & Andersson, Gunnar (2016). Millionbeløp til forskning på Hessdalsfenomenet. [Internet]. HiØ Nyheter. Full text in Research Archive
• Gjengedal, Kjerstin; Underhaug, Jarl; Magnus, Per; Kvalheim, Vigdis & Kjøniksen, Anna-Lena (2016). Utstyret i orden. [Journal]. Forskerforum. Full text in Research Archive
• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Strand, Erling Petter; Vargemezis, George & Zlotnicki, Jacques (2016). Magnetic influence on the unidentified luminous phenomena in Hessdalen, Norway. Full text in Research Archive Show summary

  Unidentified luminous phenomena have been observed in the low atmosphere over the Hessdalen valley for decades. First scientific investigation was done by E.Strand in 1984, where spiral movements of lights was recorded. The Science Camp program has conducted yearly field investigations since 2002 and has confirmed the existence of this spiral-behavior. (http://sciencecamp.no) Such behavior has also been documented in Alabama, USA. In September 2015 spiral like movement of lights was observed together with the more common spherical lights. This spiral movement indicates the presence of low atmospheric charged matter, moving in a magnetic field. A geological survey in 2014 reviled the presence of strong magnetic anomalies. The valley contains several abandoned copper mines containing Chalcopyrite and Magnetite. The Magnetite was not useful in the copper production, and left in heaps around the valley unused. This may contribute to the magnetic anomalies in the valley.

• Kjøniksen, Anna-Lena (2016). Micro-encapsulated phase change materials in concrete. Full text in Research Archive
• Sanfèlix, Susana G.; Torre, Ángeles G. De la & Kjøniksen, Anna-Lena (2016). Low CO2 binders with Micro-Encapsulated Phase Change Materials. Full text in Research Archive
• Kjøniksen, Anna-Lena (2016). Hva skal til for å gjennomføre et forskningsprosjekt. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2016). Looking into the Hessdalen lights phenomenon, and read about your fascinating experiment showing that the phenomenon could have been caused by a natural battery. [TV]. BBC Natural History. Full text in Research Archive Show summary

  Interview of: Jader Monari, Stelio Montebugnoli, Anna-Lena Kjøniksen & Bjørn Gitle Hauge by: Jolyon Sutcliffe RESEARCHER Nature's weirdest events BBC Natural History Unit Broadcasting House, Whiteladies Road, Bristol, BS8 2LR

• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2016). New data from the Hessdalen field research in september 2016. Full text in Research Archive
• Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan & Kjøniksen, Anna-Lena (2016). Using fatty acids for developing thermal energy storage materials. Full text in Research Archive
• Pilehvar, Shima & Kjøniksen, Anna-Lena (2016). The mechanical behavior of geopolymer and Portland cement concrete with micro-encapsulated PCM. Full text in Research Archive
• Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan F. & Kjøniksen, Anna-Lena (2016). Using fatty acids for money and energy savings. Full text in Research Archive
• Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan F. & Kjøniksen, Anna-Lena (2016). The effect of suspending agent type on thermal and physical properties of thermoregulating microcapsules. Full text in Research Archive
• Kjøniksen, Anna-Lena (2016). Faseovergangsmaterialer i Betong. Full text in Research Archive
• Al-Manasir, Nodar; Juvik, D. A. & Kjøniksen, Anna-Lena (2015). The Challenges of using Antifreeze Admixtures in Concrete Science. Full text in Research Archive
• Al-Manasir, Nodar; Kjøniksen, Anna-Lena & Soto, David (2015). Characterization of the Rheological Properties of Fresh Concrete. Full text in Research Archive
• Kjøniksen, Anna-Lena (2015). Smart Betong. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2015). Samarbeid på svorsk i realfag. [Internet]. Khrono. Full text in Research Archive Show summary

  HiØ. 30 mill. er satt av i et svensk-norsk samarbeid i realfag og teknologi. Interreg-prosjektet Scandinavian Science Cluster (SSC) er et treåring prosjekt og et samarbeid mellom store aktører i Norge og Sverige som skal jobbe sammen for å mobilisere akademia, industri, myndigheter og vitensentre. Det er satt av 30 millioner kroner til prosjektet.

• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2015). Høgskolen i Østfold er helt sentral i en norsk-svensk storsatsning på realfag og teknologi. [Internet]. HiØ Nyheter. Full text in Research Archive
• Che, Loan Trinh; Kjøniksen, Anna-Lena; Lambermont-Thijs, Hanneke M. L.; Hoogenboom, Richard; Schubert, Ulrich S. & Hiorth, Marianne (2015). Complex Temperature and Concentration – dependent Self-assembly of Poly(2-oxazoline) Block Copolymers. Full text in Research Archive
• Kjøniksen, Anna-Lena (2015). Swelling and Aggregation both Increase the Size of Polymer Nanoparticles, How do we Tell the Difference? Full text in Research Archive
• Kjøniksen, Anna-Lena; Pamies, Ramon Francisco Porras; Al-Manasir, Nodar; Zhu, Kaizheng & Nyström, Bo (2015). Thermoresponsive Poly(N-Isopropylacrylamide) Star Polymers. Full text in Research Archive
• Kjøniksen, Anna-Lena (2015). Is the Size Increase of my Nanoparticles Due to Swelling or Aggregation? Full text in Research Archive
• Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter (2015). Analyzed data from the 2014 Science Camp in Hessdalen. Full text in Research Archive
• Strand, Erling Petter; Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Zlotnicki, Jacques; Vargemezis, George & Yverot, Paul (2015). Overview of the transient luminous events in Hessdalen, Norway. Full text in Research Archive
• Zlotnicki, Jacques; Vargemezis, George; Strand, Erling Petter; Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Yverot, Paul (2015). Geophysical surveys in Hessdalen valley (Norway): New light on Hessdalen lights. Full text in Research Archive
• Kjøniksen, Anna-Lena (2014). Hvordan forskning foregår i praksis. Full text in Research Archive
• Kjøniksen, Anna-Lena (2014). Hva er plast og plastfraksjoner? Full text in Research Archive
• Kjøniksen, Anna-Lena; Hauge, Bjørn Gitle; Dursun, Kamil & Drøbak, Trond Atle (2014). Rekordstor forskning - 18 millioner til varmeforskning. [Journal]. Fredriksstad Blad. Full text in Research Archive
• Kjøniksen, Anna-Lena (2014). Superbetong. [Radio]. NRK, Distriktsprogram - Østfold, Morran i Østfold 18. Full text in Research Archive
• Kjøniksen, Anna-Lena (2014). Forskningsprosjekt med energieffektiv beting på Høgskolen i Østfold. [TV]. Distriktsnyheter Østfold. Full text in Research Archive
• Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena (2014). Gjør "gull" av betong. Banebrytende forskning på betongens egenskaper er målsetningen når ingeniøravdelingen tar fatt på Høgskolen i Østfolds største prosjekt noensinne. [Internet]. HiØ Aktielt. Full text in Research Archive
• Yip, Wai Lam; Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2013). Preparation of chitosan nanoparticles – a multivariate approach. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2013). Polysaccharide-based Nanoparticles as a Drug Delivery System - Preparation and Physico-chemial Characterization. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Sande, Sverre Arne; Nyström, Bo & Cardoso, Ana Maria S. [Show all 10 contributors for this article] (2013). Temperature-Responsive Polymers as Nanocarriers for Gene Delivery. Full text in Research Archive
• Kjøniksen, Anna-Lena (2013). Nanoteknologiens innvirkning på mekaniske styrke- og materialegenskaper i plast og kompositter. Full text in Research Archive
• Klemetsrud, Therese; Hiorth, Marianne; Kjøniksen, Anna-Lena & Smistad, Gro (2013). Liposomal complexes that changes around body temperature. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Sande, Sverre Arne; Nyström, Bo & Cardoso, Ana Maria S. [Show all 10 contributors for this article] (2013). Nanobærere for genterapi. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2012). Polysakkarid-baserte nanopartikler som legemiddelform. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2012). Compactness of chitosan nanoparticles and implications in drug delivery. Full text in Research Archive
• Trinh, Loan Thi To; Lambermont-Thijs, Hanneke M. L.; Schubert, Ulrich S.; Hoogenboom, Richard & Kjøniksen, Anna-Lena (2012). Thermoresponsive poly(2-oxazoline) block copolymers exhibiting two cloud points: Complex multistep assembly behavior. Full text in Research Archive
• Kjøniksen, Anna-Lena; Jonassen, Helene & Hiorth, Marianne (2012). Chitosan Nanoparticles for Drug Delivery Applications. Full text in Research Archive
• Nyström, Bo; Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Knudsen, Kenneth D (2011). Temperature-Induced Structural and Viscosification Behavior in Aqueous Solutions of Charged Pentablock Tercopolymers. Full text in Research Archive
• Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Maleki, Atoosa; Al-Manasir, Nodar & Nyström, Bo [Show all 7 contributors for this article] (2011). The use of Thermosensitive PNIPAAM Microgels for Sustained Release of the Opiod Antagonist Naltrexone. Full text in Research Archive
• Kjøniksen, Anna-Lena & Jonassen, Helene (2011). Determination of Particle Compactness of Polymer Nanoparticles, and the Effect on Drug Release Rates. Full text in Research Archive
• Nyström, Bo; Pamies, Ramón; Zhu, Kaizheng; Volden, Sondre; Kjøniksen, Anna-Lena & Karlsson, Göran [Show all 7 contributors for this article] (2011). Temperature-Induced Polyelectrolyte Bridging Interaction of Gold Nanoparticles with an Adsorbed Temperature Sensitive Cationic Copolymer. Full text in Research Archive
• Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne (2011). Adjustment of solvent salinity in the preparation of chitosan nanoparticles – effects on important particle characteristics. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Kjøniksen, Anna-Lena; Maleki, Atoosa; Nyström, Bo & Sande, Sverre Arne (2011). Influence of Hydrophobicity and Process Factors in the Production of Chitosan Microparticles for the Delivery of Opioid Antagonists. Full text in Research Archive
• Nyström, Bo; Pamies, Ramón; Zhu, Kaizheng; Volden, Sondre; Kjøniksen, Anna-Lena & Karlsson, Göran [Show all 7 contributors for this article] (2011). Temperature-Induced Polyelectrolyte Bridging Interaction of Gold Nanoparticles with an Adsorbed Thermoresponsive Cationic Copolymer. Full text in Research Archive
• Kjøniksen, Anna-Lena; Phan, Hang; Zhu, Kaizheng & Nyström, Bo (2010). Thermosensitivehydroxyethylcellulose-graft-poly(N-isopropylacrylamide) nanoparticles. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng; Pamies, Ramón & Nyström, Bo (2010). Influence of Block Size on Thermoresponsive Diblock Copolymers. Full text in Research Archive
• Nyström, Bo; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Sande, Sverre Arne (2010). Temperature Responsive Gels Containing PNIPAAM in Combination with PAMAM Dendrimers. Full text in Research Archive
• Nyström, Bo; Zhu, Kaizheng; Pamies, Ramon Francisco Porras; Maleki, Atoosa & Kjøniksen, Anna-Lena (2010). Special Features of Thermoresponsive Amphiphilic Copolymers - Experimental Results and Simulations. Full text in Research Archive
• Kjøniksen, Anna-Lena; Pamies, Ramón; Zhu, Kaizheng & Nyström, Bo (2010). Temperature-induced Polyelectrolyte Bridging Flocculation of Gold Nanoparticles with an Adsorbed Thermoresponsive Cationic Copolymer. Full text in Research Archive
• Trinh, Loan Thi To; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo (2010). Temperature-induced Adsorption and Optical Prperties of an Amphifilic Diblock Copolymer Adsorbed onto Flat and Curved Siver surfaces. Full text in Research Archive
• Phan, Hang; Kjøniksen, Anna-Lena & Nyström, Bo (2010). Thermoresponsive Properties of Hydroxyethyl cellulose Grafted with poly-(N-isopropyl acrylamide). Full text in Research Archive
• Glomm, Wilhelm; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Yasuda, Masahiro & Genzer, Jan [Show all 7 contributors for this article] (2009). Thermoresponsive amphihilic polymers on gold nanoparticles. Full text in Research Archive
• Al-Manasir, Nodar; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Temperature- and pH-Responsive PNIPAAM-co-PAA Microgel. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo (2009). Thermosensitive triblock copolymers. Full text in Research Archive
• Trinh, Loan Thi To; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Salt-Induced Aggregation of Silver Nanoparticles in Aqueous Solutions of Cellulose Derivatives. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Association and Degradation Behavior of Aqueous Solutions of Pig Gastric Mucin and Hyaluronan. Rheo-Small Angle Light Scattering and High Pressure Studies. Full text in Research Archive
• Nyström, Bo; Al-Manasir, Nodar; Kjøniksen, Anna-Lena; Maleki, Atoosa; Beheshti, Neda & Zhu, Kaizheng [Show all 8 contributors for this article] (2009). Characterization of Structural and Dynamical Features in Aqueous Solutions of Amphiphilic Copolymers. Full text in Research Archive
• Nyström, Bo; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Behrens, Manja & Pedersen, Jan Skov (2009). Thermosensitive Anionic Triblock Copolymers. Full text in Research Archive
• Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2009). Characterization of Interactions in Mixed Oppositely Charged Polyelectrolyte Systems. Full text in Research Archive
• Al-Manasir, Nodar; Kjøniksen, Anna-Lena & Nyström, Bo (2009). Chemical Cross-Linked Nanoparticles with Potential for Enhanced Oil Recovery Applications. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo (2009). Temperature Responsive Copolymers in Aqueous Solutions. Full text in Research Archive
• Al-Manasir, Nodar; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo (2009). Functional Microgels for Enhanced Oil Recovery Applications. Full text in Research Archive
• Glomm, Wilhelm; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Yasuda, Masahiro & Genzer, Jan [Show all 7 contributors for this article] (2009). Temperature-dependent optical properties of gold nanoparticles coated with PNIPAAM-derivates and Immunoglobulin G. Full text in Research Archive
• Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Atom Transfer Radical Polymerization Synthesis of Charged Thermoresponsive Triblock Copolymers. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2008). Effect of pH and Different Cross-Linker Agents on the Degradation of Hyaluronic Acid Solutions. Full text in Research Archive
• Nyström, Bo; Pamies, Ramon Francisco Porras; Zhu, Kaizheng & Kjøniksen, Anna-Lena (2008). Temperature-Induced Assemmbling and Contraction of Thermoresponsive Uncharged and Charged Block Copolymers in Aqueous Solution. Full text in Research Archive
• Nyström, Bo; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Jin, Huiting (2007). Temperature-induced formation and contraction of micelle-like aggregates in aqueous solutions of thermoresponsive short-chain copolymers. Full text in Research Archive
• Nyström, Bo; Maleki, Atoosa; Liu, Zhengjun; Zhu, Kaizheng & Kjøniksen, Anna-Lena (2007). Intramolecular and intermolecular association during chemical cross-linking of dilute solutions of different polysaccharides under the influence of shear flow. Full text in Research Archive
• Kjøniksen, Anna-Lena; Zhu, Kaizheng; Nyström, Bo & Beheshti, Neda (2007). Modified Polysaccharides for use in Enhanced Oil Recovery Applications. Full text in Research Archive
• Beheshtivadeghani, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2007). Effects of b-cyclodextrin and b-cyclodextrin Polymer Addition and Temperature on the Modulation of Hydrophobic Interactions in Aqueous Solutions of Two Hydrophobically Modified Biopolymers. Full text in Research Archive
• Maleki, Atoosa; Nyström, Bo & Kjøniksen, Anna-Lena (2007). Anomalous Rheological and Structural Behavior in Aqueous Solutions and Cross-Linked Gels of Hyaluronic Acid. Full text in Research Archive
• Beheshti, Neda; Nyström, Bo; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Huaitian, Bu & Naess, Stine N [Show all 8 contributors for this article] (2006). Structural and Rheological Features of Aqueous Solutions of Hydroxyethylcellulose and Its Hydrophobically Modified Analogue in the Presence of a Cyclodextrin Derivative. Full text in Research Archive
• Maleki, Atoosa; Beheshti, Neda; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2006). Structural and Dynamical Characteristics of Amphiphilic Polymers. Full text in Research Archive
• Maleki, Atoosa; Beheshti, Neda; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo (2006). Structural and Dynamical Behaviour of Some Cellulose Derivatives in the Presence of Cross-Linker and Surfactants. Full text in Research Archive
• Maleki, Atoosa; Silioc, Christelle; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo (2006). Effect of Hydrophobic Modification on Rheological and Swelling Features during Chemical Gelation of Aqueous Hydroxyethylcellulose. Full text in Research Archive
• Beheshti, Neda; Nyström, Bo; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nguyen, Giao (2006). Structure and Dynamics of an Anionic Cellulose Derivative and Anionic or Cationic Surfactants. Full text in Research Archive
• Nyström, Bo; Galant, Céline; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Amiel, Catherine & Burckbuchler, Virginie (2005). Thermo-Responsive Interaction between Beta-Cyclodextrin and Amphiphilic Biopolymers. Full text in Research Archive
• Nyström, Bo; Huaitian, Bu; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Maleki, Atoosa (2005). Characterization of Intermolecular Associations and Intramolecular Interactions in Aqueous Polymer Systems. Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2005). Competition Between Intramolecular and Intermolecular Interactions and effect of Shear Rate during Chemical Cross-Linking of Dilute Solutions of Hydroxy(ethylcellulose). Full text in Research Archive
• Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo (2005). Effect of Cross-Linking Density on Structure, Dynamics and Rheology of Chemically Cross-Linked Hydroxy(ethylcellulose) near the Gelation Threshold. Full text in Research Archive
• Kjøniksen, Anna-Lena (2004). Physical Properties of Aqueous Solutions of a Thermoreversibly Associating Co-Polymer. Full text in Research Archive
• Kjøniksen, Anna-Lena (2003). Thermally Controlled Chain Association in Aqueous Solutions of Poly(N-isopropyl acrylamide)-g-Poly(ethylene oxide). Dynamic Light Scattering. Full text in Research Archive
• Lauten, Rolf Andreas; Knutsen, K. D.; Kjøniksen, Anna-Lena & Nyström, Bo (2003). Bulk and adsorption properties of an hydrophobically modified poly(vinyl alcohol) and its unmodified analogue in the presence of salt. Full text in Research Archive
• Kjøniksen, Anna-Lena; Nordby, Marianne Hiorth & Nyström, Bo (2003). Shear-Induced Association and Gelation of Aqueous Solutions of Pectin. Full text in Research Archive
• Baldursdottir, Stefania; Nyström, Bo; Kjøniksen, Anna-Lena; Roots, Jaan; Karlsen, Jan & Tønnesen, Hanne Hjorth (2002). Degradation of Alginate by Riboflavin Photosensitizer. Full text in Research Archive Show summary

  Purpose: The possibility of using photosensitized degradation of biopolmers in order to develop a light activated drug delivery system was investigated. Riboflavin was added to solutions of alginate and the viscosity of the samples was measured as a function of irradiation time. Various quenchers and scavengers were added to the system in order to obtain information on the degradation process. Methods: The alginate samples were exposed to a xenon lamp (1.8kW) equipped with a glass filter transmitting light corresponding to exposure behind window glass (cut-off ~310nm). Changes in sample viscosity was determined by use of a Bohlin rheometer. Chemical- and/or conformational changes in the alginate structure were characterized by light scattering methods. The absorbance and fluorescence spectra of the samples were recorded to detect possible interactions between the reactants and alginate and to follow the conversion of riboflavin into lumichrome. The effect of various scavengers and quenchers on the photosensitized viscosity change was determined. Results: The decrease in viscosity was about 5% and 38% in the absence and presence of sensitizer (riboflavin) respectively after 30 minutes exposure. The main part of the viscosity change did however take place during the initial five minutes of irradiation. This corresponds to the conversion of riboflavin into lumichrome in this system. A combination of glutathion (free radical scavenger) and sodium azid (singlet oxygen quencher) had a strongly retarding effect on the decrease in viscosity when added to the system in the presence of riboflavin. The photosensitized loss of viscosity seems to be related to a combination of polymer degradation and structural changes. Conclusion: The molecular weight and structure of alginate can be strongly affected by light in the presence of a sensitizer. The effect of riboflavin on alginate is most likely due to the formation of singlet oxygen and free radicals resulting from the photodegradation of riboflavin to lumichrome. This demonstrates that photosensitized degradation of alginate has a potential in the design of light activated biopolymer systems. Other sensitizers are now under evaluation in order to optimize the reaction.

• Lauten, Rolf Andreas; Nyström, Bo & Kjøniksen, Anna-Lena (2001). Salt-induced particle aggregation in the presence of amphiphilic polymers of different hydrophobicity. Full text in Research Archive
• Kjøniksen, Anna-Lena (1999). Effect of Surfactant on Dynamic and Viscoelastic Properties of Aqueous Solutions of Hydrophobically Modified Ethyl(hydroxyethyl)cellulose, with and without Spacer. Full text in Research Archive
• Kjøniksen, Anna-Lena (1998). Light Scattering from Aqueous Solutions of Polymer Blends. Full text in Research Archive
• Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo (1998). Gelling Aqueous Systems of Ethyl(hydroxyethyl)cellulose. Full text in Research Archive
• Kjøniksen, Anna-Lena (1997). Rheological Behavior of Aqueous Solutions of Ethyl(hydroxyethyl)cellulose in the Presence of Various Amounts of Surfactant. Full text in Research Archive
• Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo (1997). The Effects of Salinity and Surfactant Addition on Dynamics of Dilute Aqueous Solutions of Ethyl(hydroxyethyl)cellulose. Full text in Research Archive
• Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo (1997). Dynamic Light Scattering on Semidilute Aqueous Systems of Ethyl(hydroxyethyl)cellulose. Effects of Temperature, Surfactant Concentration and Salinity. Full text in Research Archive
• Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo (1997). Dynamic Light Scattering on Aqueous Solutions of EHEC-SDS with and without Salt. Full text in Research Archive
• Kjøniksen, Anna-Lena & Nyström, Bo (1995). The Sol-Gel Transition of Aqueous Systems of Poly(vinyl alcohol) Studied by Dynamic Light Scattering and Oscillatory Shear Measurements. Full text in Research Archive
• Calejo, Maria Teresa Rebelo; Sande, Sverre Arne; Nyström, Bo & Kjøniksen, Anna-Lena (2013). Thermoresponsive polymers in controlled drug delivery and gene delivery. Universitetet i Oslo. Full text in Research Archive Show summary

  In this thesis, emphasis is given to the study of temperature-responsive systems and their use in drug and gene delivery applications.<br><br> Studies on polymer-surfactant systems were conducted, using amino acid-based surfactants. In these studies, ethyl (hydroxyethyl) cellulose (EHEC) was the investigated polymer, while the interactions with six different surfactants were analyzed. Three of these were anionic and lysine-based, having a gemini-like structure and different alkyl chain length. In addition, three cationic arginine-based surfactants were investigated. Of these, two had a gemini structure, while the third was monomeric.<br><br> The polymer-surfactant systems were characterized in terms of their rheological properties, i.e. complex viscosity, gel points, gel properties and thermodynamic features in form of cloud points. It was shown that the mixtures were generally low viscous at room temperature, and that the viscosity increased at higher temperatures, in agreement with the formation of a polymer network stabilized by hydrophobic associations and electrostatic repulsions. Sol-gel transitions were also observed, suggesting that the gels could be employed as pharmaceutical formulations undergoing gelation in situ, once injected.<br><br> Importantly, surfactants with long alkyl chains and gemini-like structure were the most efficient, which implies that very low amounts are needed in order to induce the sol-gel transition at elevated temperatures.<br><br> The biocompatibility of the EHEC-surfactant systems was evaluated by performing in vitro experiments on a human cell line (HeLa cells). These studies revealed that the higher toxicity of the long-chain/gemini-like surfactants was significantly compensated by their superior efficiency at low concentrations.<br><br> Experiments were further carried out with the intention of developing a microparticulate system for controlled drug delivery. An emulsification-solvent evaporation method was employed according to a planned experimental design that aimed at evaluating the process parameters on the size properties of the microparticles. Chitosan, a hydrophobicallymodified chitosan derivative (HM-chitosan) and poly lactic-co-glycolic acid (PLGA) were investigated as the polymeric matrix. The blank microparticles were characterized in terms of size and size distribution. Following the multivariate analysis, specific parameters were chosen to produce the drug-loaded microparticles. Naltrexone, an opioid antagonist, was used as the model drug. The microparticles were evaluated in terms of their morphological properties (scanning electron microscopy), and the drug encapsulation efficiency and loading capacity were determined. In vitro drug release experiments were carried out. The results from this study showed that HM-chitosan microparticles were recovered in a high yield and that the encapsulation efficiency was higher as compared to the use of the other polymers. Importantly, this polymer also demonstrated the higher capacity to retain the drug, which was slowly released for at least 50 days.<br><br> Finally, four cationic temperature-responsive block copolymers were evaluated as gene carriers. These polymers had a structure based on poly (N-isopropylacrylamide)-blockpoly(( 3-acrylamidopropyl) trimethylammonium chloride) (PNIPAAM-b-PAMPTMA(+)), and were distinct in terms of the length of the blocks. Complexes between polymer and plasmid DNA were prepared at different polymer/DNA ratios, and used to transfect HeLa cells. Because the plasmid DNA coded for green fluorescent protein (GFP), the expression of this protein was followed by flow cytometry. Cell viability studies were simultaneously carried out in order to evaluate the cytotoxic effects of the complexes. The results showed that polymers with longer PNIPAAM or shorter PAMPTMA(+) were the most effective carriers. A series of physicochemical experiments were carried out (dynamic light scattering, zeta potential and turbidity), so as to gain insights into copolymer structureactivity relationships. It was shown that the most effective carriers had a compact PNIPAAM core that collapsed at 37 °C surrounded by a positively charged corona.

• Al-Manasir, Nodar; Nyström, Bo; Kjøniksen, Anna-Lena & Moen, Arild (2012). Studies of Different Factors that Influence the size of Microgels for Enhanced Oil Recovery Applications. Universitetet i Oslo. Full text in Research Archive
• Beheshti, Neda; Nyström, Bo & Kjøniksen, Anna-Lena (2010). Structural, Dynamical, and Rheological Features of Polymer-Based Complex Systems. Universitetet i Oslo. Full text in Research Archive
• Maleki, Atoosa; Nyström, Bo & Kjøniksen, Anna-Lena (2008). Characterization of Functional Biopolymers under Various External Stimuli. Universitetet i Oslo. Full text in Research Archive Show summary

  Polymers are large molecules composed of repeating structural units connected by covalent chemical bonds. Biopolymers are a class of polymers produced by living organisms, which exhibit both biocompatible and biodegradable properties. The behavior of a biopolymer in solution is strongly dependent on the chemical and physical structure of the polymer chain, as well as external environmental conditions. To improve biopolymers in the direction of higher performance and better functionality, understanding of their physicochemical behavior and their response to external stimuli are of great importance. Rheology, rheo-small angle light scattering, dynamic light scattering, small angle neutron scattering, and asymmetric flow field-flow fractionation were utilized in this thesis to investigate the properties of hydroxyethyl cellulose and its hydrophobically modified analogue, as well as dextran, hyaluronan, and mucin under different conditions such as temperature, solvent, mechanical stress and strain, and radiation. Different novel hydrogels were prepared by using various chemical cross-linking agents. Specific features of these macromolecules provide them to be used as ‘functional’ materials, e.g., sensors, actuators, personal care products, enhanced oil recovery, and controlled drug delivery systems.

• Kjøniksen, Anna-Lena (2004). Sample Preparation - Dialysis - Centrifugation - Freeze drying. Universitetet i Oslo. Full text in Research Archive
• Kjøniksen, Anna-Lena (2004). Densiometry - pH - Turbidity. Universitetet i Oslo. Full text in Research Archive
• Kjøniksen, Anna-Lena (2004). Static Light Scattering. Universitetet i Oslo. Full text in Research Archive
• Kjøniksen, Anna-Lena (2004). Dynamic Light Scattering. Universitetet i Oslo. Full text in Research Archive
• Kjøniksen, Anna-Lena (2004). Rheology. Universitetet i Oslo. Full text in Research Archive

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