文献类型：期刊文献

英文题名：Nanostructured switchable pH-responsive membranes prepared via spherical polyelectrolyte brushes

作者：Zhang, Rui[1];Zhou, Tianxu[1];Peng, Hongwei[1];Li, Min[1];Zhu, Xuedong[1];Yao, Yuan[2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：580

起止页码：117

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20191106631726);WOS:【SCI-EXPANDED(收录号:WOS:000463884700011)】；

基金：This work was supported by the National Natural Science Foundation of China (21374029, 51573088, 21776076) and the Fundamental Research Funds for the central universities of China (22220131011). Projects of Shanghai Municipality (18JC1410802) and International Joint Laboratory of Chinese Education Ministry on Resource Chemistry are also appreciated.

语种：英文

外文关键词：Spherical polyelectrolyte brushes; Membrane; pH sensitivity; Ultrafine nanoparticles; Selectivity separation

摘要：A nano-porous and switchable pH-responsive polymeric membrane was fabricated through filtration technique with the assist of metal hydroxide nanostrands as template. A common used spherical polyelectrolyte brush (SPB), PAA@PS (poly (acrylic acid)) brushes grafted on polystyrene nanospheres, employed in this work as polymeric membrane. It features tunable pore size on line by shrinkage or stretching of PAA brushes under different pH value or ionic strength. Furthermore, both the length of PAA chains and the dimension of PS cores could tailor the pore size of the membrane effectively. These properties of PAA@PS membrane could separate nanoparticles within 10 nm with precise size-selective permeation. Meanwhile, since the membrane was endowed negative charge by PAA brushes, the membrane could adsorb and separate positive charge nanoparticles including dyes though the mixture solution effectively. Herein, this stimuli-responsive membrane is promising in the separation of ultrafine nanoparticles with precise size and charge selectivity.