Polyethersulfone-polyvinylpyrrolidone composite membranes: Effects of polyvinylpyrrolidone content and polydopamine coating on membrane morphology, structure and performances  

作　　者：Yanna Wu Jianxian Zeng Yajie Zeng Hu Zhou Guoqing Liu Jian Jian Jie Ding 

机构地区：[1]School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Hunan Provincial Engineering Research Center for Functional Membranes,Xiangtan 411201,China [2]School of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第10期84-97,共14页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51573041,21776067);the Demonstration Base Project of University-Enterprise Cooperation of Hunan Province(No.145812)。

摘　　要：Hydrophilic modification is a promising method to inhibit fouling formation on ultrafiltration membrane.In this work,different mass concentrations(1%–16%)of hydrophilic polyvinylpyrrolidone were incorporated into polyethersulfone(PES)membranes fabricated by none-solvent induced phase separation.Then,polydopamine(PDA)coating on the surface of prepared membrane was carried out at pH 8.5.The morphology and structure,surface hydrophilicity,permeation flux,BSA rejection,antifouling and stability performances of PES and PDA/PES modified membranes were investigated in detail.The results indicated that PDA was successfully attached onto the membranes.Membrane hydrophilicity was evaluated by water contact angle measurement.The contact angles of modified membranes reduced remarkably,suggesting that the membrane hydrophilicities were significantly increased.The results of filtration tests,which were done by dead-end filtration of bovine serum albumin solution,showed that the properties of permeability and fouling resistance were obviously improved by PDA modification.When polyvinylpyrrolidone mass content reached 10%,flux recovery ratio of modified membrane was up to91.23%,and its BSA rejection were over 70%.The results of stability tests showed that the modified membranes had good mechanical stability and chemical stability.This facile fabrication procedure and outstanding performances suggested that the modified membranes had a potential in treating fouling.

关 键 词：Polyethersulfone membrane Polydopamine coating HYDROPHILICITY Permeability ANTIFOULING 

分 类 号：TQ051.893[化学工程]