文献类型：期刊文献

英文题名：Photo-Reversible Supramolecular Hydrogels Assembled by -Cyclodextrin and Azobenzene Substituted Poly(acrylic acid)s: Effect of Substitution Degree, Concentration, and Tethered Chain Length

作者：Wang, Mingwei[1];Zhang, Xiaojun[1];Li, Li[1];Wang, Junyou[2];Wang, Jie[1];Ma, Jun[1];Yuan, Zhenyu[1];Lincoln, Stephen F.[3];Guo, Xuhong[1,4]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Wageningen Univ, Bio Nano Technol Grp, Dreijenpl 6, NL-6703 HB Wageningen, Netherlands;[3]Univ Adelaide, Dept Chem, Adelaide, SA 5005, Australia;[4]Shihezi Univ, Engn Res Ctr Xinjiang Bingtuan Mat Oriented Chem, Xinjiang 832000, Peoples R China

年份：2016

卷号：301

期号：2

起止页码：191

外文期刊名：MACROMOLECULAR MATERIALS AND ENGINEERING

收录：;EI(收录号：20153801281399);WOS:【SCI-EXPANDED(收录号:WOS:000370011500009)】；

基金：We gratefully acknowledge the NSFC Grants ( 20774030, 51273063, and 21476143), the Fundamental Research Funds for the Central Universities, the high school specialized research fund for the doctoral program ( 20110074110003), and 111 Project Grant (B08021) for the financial support.

语种：英文

外文关键词：-Cyclodextrin; azobenzene; photo-responsive; polymeric hydrogel; rheology

摘要：Photo-reversible supramolecular hydrogels based on the mixture of -cyclodextrin (-CD) and azobenzene (Azo) substituted poly(acrylic acid) s were prepared. Effects of substitution degree of Azo, polymer concentration and tethered chain length on the reversible sol-gel transition of these mixtures trigged by Ultraviolet-Visible (UV-Vis) radiation were investigated through rheology and UV-Vis spectroscopy. Their zero-shear viscosities enhanced upon increasing substitution degree of Azo, polymer concentration, and the tethered chain length between Azo grafts and backbone, while the zero viscosities decreased upon adding free -CD. The binding constant between -cyclodextrin and azobenzene, which were determined by UV-Vis spectroscopy, showed a strong dependence on the length of tethered chain.