نتایج جستجو برای: nipam

تعداد نتایج: 208  

2012
Gero Maatz Arkadius Maciollek Helmut Ritter

A thermo-, pH- and cyclodextrin- (CD) responsive poly(N-isopropylacrylamide) (PNIPAM), with a N,N-dimethylaminoazobenzene end group was synthesized. Using 3-mercaptopropionic acid as a chain transfer agent, PNIPAM with a well-defined COOH end group was obtained. The acid end group was transferred to the corresponding acid chloride and then functionalized with N,N-dimethyl[4-(4'-aminophenylazo)p...

Journal: :Macromolecular Materials and Engineering 2022

This study describes thermo-rheological properties of branched copolymer surfactants (BCSs) stabilizing oil-in-water emulsions to generate materials exhibiting temperature-dependent gelation with the ability solubilize a broad range molecules. Four poly(N-isopropylacrylamide-ran-poly(ethylene glycol) methacrylate) (poly(NIPAM-ran-PEGMA)) BCSs varying molecular weight (Mn), 4.7; 7.0; 7.8 and 9.0...

Journal: :Journal of colloid and interface science 2012
Kaizhong Fan Melanie Bradley Brian Vincent

The absorption of two hydrophobically modified organic salts (HMOSs), containing azobenzene units, into poly(N-isopropylacrylamide-co-acrylic acid) microgel particles has been studied at pH 8 and 20 °C. These dispersions were then irradiated with UV light (wavelength 365 nm) for 10 min to observe the effect on the microgel particle properties, such as the adsorbed amount of the HMOS, the partic...

Journal: :Journal of the American Chemical Society 2001
R P Washington O Steinbock

The study of hydrogels and their response to external environment is of special interest because of their potential as drug delivery systems,1,2 actuators,3 and separation devices.4,5 Temperature-sensitive hydrogels undergo a reversible swellingdeswelling transition with a small change of temperature near the phase transition point.6 A frequently studied thermosensitive hydrogel is based on sol...

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