Gold-Loaded Polymeric Micelles with TemperatureModulated Catalytic Activity  

作　　者：胡娜 SHI Dongjian LI Jihang LI Junfeng 陈明清 

机构地区：[1]The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University [2]Department of Chemical Engineering, Jiangyin Polytechnic College

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2015年第5期1092-1097,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51173072);Research and Innovation Program for Graduate Colleges and Universities(Nos.CXZZ11_0469,JUDCF09006)

摘　　要：Four-armed amphiphilic block copolymers, polystyrene-b-poly(N-isopropylacrylamide)(PS-bPNIPAM)4, were synthesized by atom transfer radical polymerization(ATRP).(PS-b-PNIPAM)4 self-assembled into micelles with PS block as core and thermoresponsive PNIPAM block as corona. The gold nanoparticles(Au NPs) with average diameter about 5.8 nm were immobilized on the surfaces of the micelles by the reduction of the corresponding ions. The micelle-supported gold nanoparticles(Au-micelles) were applied to catalyze the reduction of p-nitrophenol. Moreover, the activity of the Au-micelle catalyst could be modulated by the temperature and the Au-micelles could be easily recovered by changing the temperature and recycled four times with high catalytic activity.Four-armed amphiphilic block copolymers, polystyrene-b-poly(N-isopropylacrylamide)(PS-bPNIPAM)4, were synthesized by atom transfer radical polymerization(ATRP).(PS-b-PNIPAM)4 self-assembled into micelles with PS block as core and thermoresponsive PNIPAM block as corona. The gold nanoparticles(Au NPs) with average diameter about 5.8 nm were immobilized on the surfaces of the micelles by the reduction of the corresponding ions. The micelle-supported gold nanoparticles(Au-micelles) were applied to catalyze the reduction of p-nitrophenol. Moreover, the activity of the Au-micelle catalyst could be modulated by the temperature and the Au-micelles could be easily recovered by changing the temperature and recycled four times with high catalytic activity.

关 键 词：N-ISOPROPYLACRYLAMIDE four-armed block copolymer micelles nanoparticles CATALYST 

分 类 号：TQ317[化学工程—高聚物工业] O643.36[理学—物理化学]