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Macroporous poly(N-isopropylacrylamide) networks
Polymer Bulletin, 2002Summary Effects of the gel preparation temperature Tprep and the initial monomer concentration c on the swelling and the porosity properties of poly(N-isopropylacrylamide) (PNIPA) networks are described. PNIPA networks were prepared by free-radical crosslinking copolymerization of N-isopropylacrylamide and N,N’-methylene(bis)acrylamide (BAAm) in ...
Cigdem Sayil, Oguz Okay
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Journal of Shanghai University (English Edition), 2005
The thermosensitive poly (N-isopropylacrylamide) (PNIPAAm) and poly (N-isopropylacrylamide-co-acrylamide) [poly (NIPAAm-co-AAm)] hydrogels with different acrylamide molar percentage are prepared by radiation polymerization using Co60 γ-ray. Their swelling equilibrium data in the media of deionized water, NaCl aqueous solutions and different pH buffer ...
Yong Pei +4 more
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The thermosensitive poly (N-isopropylacrylamide) (PNIPAAm) and poly (N-isopropylacrylamide-co-acrylamide) [poly (NIPAAm-co-AAm)] hydrogels with different acrylamide molar percentage are prepared by radiation polymerization using Co60 γ-ray. Their swelling equilibrium data in the media of deionized water, NaCl aqueous solutions and different pH buffer ...
Yong Pei +4 more
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Swelling kinetics of poly(N-isopropylacrylamide) gel
Journal of Controlled Release, 1998In many gel applications the swelling and shrinking kinetics are very important, e.g. in controlled/slow release, where the kinetics determined the rate of out-diffusion of the active component, and in gel extraction where the gel is swollen and shrunk several times.
M, Andersson, A, Axelsson, G, Zacchi
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Dextran permeation through poly(N-isopropylacrylamide) Hydrogels
Journal of Biomaterials Science, Polymer Edition, 1994The permeation of macromolecules such as fluoroescein-labeled dextran fractions through thermally reversible hydrogels has been investigated. A permeation model has been formulated, which takes into account hydrogel porosity and tortuosity as well as the combined effect of a geometric restraint for a relatively large solute molecule at a pore entrance ...
L C, Dong, A S, Hoffman, Q, Yan
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Aggregation behavior of poly(N-isopropylacrylamide) microspheres
Colloids and Surfaces B: Biointerfaces, 2001Electrophoretic mobility and aggregation in suspensions of three types of microspheres (Ms 1, Ms 2 and Ms 3) are studied at different pH, ionic strengths and temperatures of the medium. Here Ms 1 is a core particle composed of poly(N-isopropylacrylamide-co-styrene). Ms 2 is a core-shell microsphere consisting of Ms 1 as the particle core covered with a
K, Makino, H, Kado, H, Ohshima
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Adsorption of poly(N-isopropylacrylamide) on glass substrata
Journal of Colloid and Interface Science, 2004The adsorption of poly(N-isopropylacrylamide) (PNIPAAM), a well known thermosensitive polymer, on glass was investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The polymer was dissolved in water at low (0.02 g/L) and high (2 g/L) concentration and the tested temperatures were below (25 degrees C) and above (50 ...
Callewaert, M. +3 more
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Characterization of Poly(N-isopropylacrylamide) and Magnetic Poly(N-isopropylacrylamide) Latexes
2009Monodisperse poly(N-isopropylacrylamide) (PNIPA) nanogel latexes with temperature and magnetic field sensitivity were prepared and characterized. The phase transition of the latex was characterized by dynamic light scattering. Electrokinetic measurements revealed that the particles have a negative surface charge, which depends on the pH of the swelling
Árpád Némethy +4 more
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Polymer Bulletin, 2021
The present study pertains to the study of ferroin-catalyzed Belousov–Zhabotinsky (BZ) oscillatory chemical reaction having catechol as an organic substrate in aqueous acid media at 30 ± 0.1 °C under stirred batch conditions. The above system shows oscillations within narrow range of concentration of initial reagents which was monitored ...
Shafia Lateef +2 more
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The present study pertains to the study of ferroin-catalyzed Belousov–Zhabotinsky (BZ) oscillatory chemical reaction having catechol as an organic substrate in aqueous acid media at 30 ± 0.1 °C under stirred batch conditions. The above system shows oscillations within narrow range of concentration of initial reagents which was monitored ...
Shafia Lateef +2 more
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Poly(N-isopropylacrylamide) branched polymer nanoparticles
Polymer Chemistry, 2011A series of thermally responsive branched copolymers based on N-isopropylacrylamide (NIPAAm) and poly(ethylene glycol) methacrylate (PEGMA) are synthesized using a direct, single step modified free radical polymerization strategy. The aqueous solution behaviour and nanoparticle formation of these copolymers are studied and correlated to the NIPAAm ...
Pierre Chambon +5 more
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Cytocompatible Performance of Thermosensitive Poly(N-Isopropylacrylamide) Nanoparticles
Journal of Biomaterials Science, Polymer Edition, 2012The development of biomedical materials with biocompatibility, especially cytocompatibility, is the frontal research field for material science, biology, medicine, pharmacology and related interdisciplines. We have successfully synthesized a new biomedical material, PNIPAM-g-P(NIPAMco-St) (PNNS) core-shell nanoparticles, and investigated its ...
Guo-Hui, Zhang +4 more
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