Thermal and pH Dual Responsive Copolymer and Silver Nanoparticle Composite for Catalytic Application  

作　　者：Luqman Ali Shah Wulian Chen Mohammad Siddiq Jianhua Hu Angang Dong Dong Yang 

机构地区：[1]State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200433,China [2]Department of Chemistry,Quaid-i-Azam University,Islamabad 45320,Pakistan [3]Department of Chemistry,Fudan University,Shanghai 200433,China

出　　处：《Chinese Journal of Chemistry》2015年第4期467-472,共6页中国化学（英文版）

基　　金：support from the Na-tional Natural Science Foundation of China(Nos.51073042,51103026,51373035,and 51373040);the Shanghai Scientific and Technological Innovation Pro-ject(Nos.11JC1400600,10431903000 and 124119a2400);the Specialized Research Fund for the Doctoral Program of Higher Education(No.20110071120006).

摘　　要：N-Isopropylacrylamide and vinyl imidazole copolymer,P(NIPAM-co-VI),was synthesized by free radical emulsion polymerization.Then,the copolymer and silver nanoparticle composite,P(NIPAM-co-VI)-Ag,was pre-pared by in situ reduction of AgNO3 with NaBH4.Due to the coexistence of thermal-responsive PNIPAM and pH-responsive PVI,P(NIPAM-co-VI)and P(NIPAM-co-VI)-Ag exhibited both thermal and pH responsibility,their size would change while altering the temperature or pH of the circumvent.Their thermal and pH dual responsive properties were studied by dynamic light scattering(DLS).P(NIPAM-co-VI)-Ag could be stably dispersed in water at a pH range from 3.0 to 9.3,which is favorable to use P(NIPAM-co-VI)-Ag as a catalyst in the reduction reaction of p-nitrophenol.The reaction rate constant(kapp)increased with the decrease of pH or the increase of VI content in the copolymer.

关 键 词：COPOLYMER CATALYST silver nanoparticle stimuli responsive emulsion polymerization 

分 类 号：O63[理学—高分子化学]