Effect of adding a smart potassium ion-responsive copolymer into polysulfone support membrane on the performance of thin-film composite nanofiltration membrane  

作　　者：Meibo He Zhuang Liu Tong Li Chen Chen Baicang Liu John C.Crittenden 

机构地区：[1]Institute of New Energy and Low-Carbon Technology,Sichuan University,Chengdu 610207,China [2]College of Architecture and Environment,Sichuan University,Chengdu 610065,China [3]School of Chemical Engineering,Sichuan University,Chengdu 610065,China [4]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [5]Litree Purifying Technology Co.,Ltd,Haikou 571126,China [6]Brook Byers Institute for Sustainable Systems,School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA

出　　处：《Frontiers of Chemical Science and Engineering》2019年第2期400-414,共15页化学科学与工程前沿（英文版）

基　　金：the National Natural Science Foundation of China (Grant No.51678377);Sichuan University Outstanding Youth Foundation (2015SCU04A35);Applied Basic Research of Sichuan Province (2017JY0238);Key Projects in the Science & Technology Program of Hainan Province (zdkj2016022).

摘　　要：Thin-film composite (TFC) nanofiltration (NF) membranes were fabricated via the interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricart)oiiyl trichloride on polysulfone (PSf) support membranes blended with K^+-responsive poly(N-isopropylacryamideco- acryloylamidobenzo-15-crown-5)(P(NIPAM-co- AAB15C5)). Membranes were characterized by attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscope, scanning electron microscope, contact angle, and filtration tests. The results showed that:(1) Under K^+-free conditions, the blended P(NIPAM-co-AAB15C5)/PSf supports had porous and hydrophilic surfaces, thereby producing NF membranes with smooth surfaces and low MgSO4 rejections;(2) With K^+ in the PIP solution, the surface roughness and water permeability of the resultant NF membrane were increased due to the K^+-induced transition of low-content P(NIPAM-co-AAB15C5) from hydrophilic to hydrophobic;(3) After a curing treatment at 95℃, the improved NF membrane achieved an even higher pure water permeability of 10.97 L·m^-2·h^-1 - bar1 under 200 psi. Overall, this study provides a novel method to improve the performance of NF membranes and helps understand the influence of supports on TFC membranes.

关 键 词：NANOFILTRATION interfacial polymerization SUPPORT MEMBRANE potassium ion-responsive thin-film composite 

分 类 号：TQ[化学工程]