文献类型：期刊文献

英文题名：Effect of block sequence on responsive behavior of core-shell diblock polymer brushes

作者：Cao, Lan[1];Chen, Kaimin[2];Qin, Xue[1];Zhang, Ying[1];Li, Kai[2];Guo, Xuhong[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China;[3]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Shihezi 832000, Xinjiang, Peoples R China

年份：2018

卷号：223

起止页码：116

外文期刊名：MATERIALS LETTERS

收录：;EI(收录号：20181505000879);WOS:【SCI-EXPANDED(收录号:WOS:000430884700030)】；

基金：This research was supported by the National Natural Science Foundation of China (21504052, 51273063, 21476143) and the Shanghai Sailing Program (15YF1404800). We would like to thank LetPub (www.letpub.com) for providing linguistic assistance during the preparation of this manuscript.

语种：英文

外文关键词：Nanoparticles; Structural; Stimulus-response

摘要：In this work, two kinds of core-shell diblock polymer brushes, i.e., poly(acrylic acid)-b-poly(N-isopropyla crylamide) and poly(N-isopropylacrylamide)-b-poly(acrylic acid) diblock polymer brushes with polystyrene cores (PSV@PAA-b-PNIPA and PSV@PNIPA-b-PAA), were prepared by surface-initiated photoinifer-termediated polymerization (SI-PIMP). Both of them are demonstrated to be dually responsive to pH and temperature. Compared to brushes with random polymer chains of PAA and PNIPA, the control of PAA and PNIPA block sequence not only affects the responsive behavior, but also changes the competition between intermolecular and intramolecular forces which results in remarkable conformation variation. The "inverse" temperature response of PSV@PAA-b-PNIPA could shine light on structure design of polymer brushes for applications such as protein separation. (C) 2018 Elsevier B.V. All rights reserved.