文献类型：期刊文献

英文题名：Mechanistic Insights of a Thermoresponsive Interface for Fouling Control of Thin-Film Composite Nanofiltration Membranes

作者：Xu, Daliang[1,2];Zheng, Junfeng[2];Zhang, Xin[2,3];Lin, Dachao[1,4];Gao, Qieyuan[2];Luo, Xinsheng[1];Zhu, Xuewu[5];Li, Guibai[1];Liang, Heng[1];Van der Bruggen, Bart[2,6]

机构：[1]Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China;[2]Katholieke Univ Leuven, Dept Chem Engn, B-3001 Leuven, Belgium;[3]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, State Key Lab Chem Engn,Membrane Sci & Engn R&D L, Shanghai 200237, Peoples R China;[4]Univ Duisburg Essen, Lehrstuhl Tech Chem 2, D-45117 Essen, Germany;[5]Shandong Jianzhu Univ, Sch Municipal & Environm Engn, Jinan 250101, Peoples R China;[6]Tshwane Univ Technol, Fac Engn & Built Environm, ZA-0001 Pretoria, South Africa

年份：2022

卷号：56

期号：3

起止页码：1927

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20220511580771);WOS:【SCI-EXPANDED(收录号:WOS:000797926700045)】；

基金：This research was jointly supported by the National Natural Science Foundation of China (51778170), State Key Laboratory of Urban Water Resource and Environment (2019DX01), and Fundamental Research Funds for the Central Universities. The first author also thanks the China Scholarship Council (CSC) for providing the living cost during his study at KU Leuven.

语种：英文

外文关键词：nanofiltration; interfacial polymerization; atom-transfer radical polymerization; thermoresponsive; fouling control

摘要：In spite of extensive research, fouling is still the main challenge for nanofiltration membranes, generating an extra transport resistance and requiring a larger operational pressure in practical applications. We fabricated a highly antifouling nano-filtration membrane by grafting poly(N-isopropylacrylamide) (PNIPAM) chains on a bromine-containing polyamide layer. The resulting membrane was found to have a double permeance compared to the pristine membrane, while the rejection of multivalent ions remained the same. In addition, PNIPAM chains yielded a better deposition resistance and adhesion resistance, thereby mitigating the increase of fouling and promoting the recovery of flux during the filtration and traditional cleaning stages, respectively. Moreover, PNIPAM chains shrank when the water temperature was above the lower critical solution temperature (LCST), indicating the formation of a buffer layer between the membrane and pollutants. The buffer layer would eliminate the membrane-foulant interaction energy, thus further enhancing the detachment of pollutants. This simple and efficient cleaning method could act as an enhanced cleaning procedure to remove irreversible fouling. This provides new insights into the fabrication of enhanced antifouling membranes using smart responsive polymer chains.