文献类型：期刊文献

英文题名：Composite structure of temperature sensitive chitosan microgel and anomalous behavior in alcohol solutions

作者：Liu, Weijun[1,2]; Huang, Yongmin[1]; Liu, Honglai[1]; Hu, Ying[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Shanghai Inst Technol, Dept Chem Engn, Shanghai 200233, Peoples R China

年份：2007

卷号：313

期号：1

起止页码：117

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20072810699560);WOS:【SCI-EXPANDED(收录号:WOS:000248351900015)】；

语种：英文

外文关键词：core-shell microgel; graft copolymerization; thermosensitive property

摘要：Poly(N-isopropylacrylamide)/chitosan (PNIPAM/CS) core-shell microgel was synthesized by graft copolymerization. The microstructure of copolymers was characterized by FT-IR spectrum and H-1-nuclear magnetic resonance (H-1 NMR). Transmission electron microscope (TEM) and dynamic light scattering (DLS) measurements display that the microgel has high monodispersity and with a core-shell structure. For swelling the microgel in various alcohol solutions, the particles first shrink; then flocculation occurs resulted from weak aggregation of particles with the increase of alcohol concentration. The investigation of the size of microgels as a function of temperature shows that the thermo-sensitive property is markedly exhibited when the alcohol concentration is low, and vanishes when the alcohol concentration exceeds some value where the microgels have the lowest size. (c) 2007 Elsevier Inc. All rights reserved.