Preparation and characterization of modified polyethersulfone hollow fiber membranes by blending poly (styrene-alt-maleic anhydride)

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• 作者：Tao Xiang^a ; Min Tang^a ; Yeqiu Liu^b ; Huijuan Li^a ; LuLu Li^a ; Wenyue Cao^a ; Shudong Sun^a ; Changsheng Zhao^a ; ^{zhaochsh70@scu.edu.cn} ; ^{zhaochsh70@163.com}
• 关键词：Polyethersulfone ; Hollow fiber membrane ; Poly (styrene-alt-maleic anhydride) ; pH-sensitivity ; pH-reversibility ; Hysteresis
• 刊名：Desalination
• 出版年：2012
• 期刊代码：24_00119164
• 类别：ce
• 出版时间：1 June, 2012
• 卷：295
• 期：Complete
• 页码：26-34
• 文件大小：1068 K

摘要

In this study, pH-sensitive polyethersulfone (PES) hollow fiber membrane was prepared by blending a copolymer of poly (styrene-alt-maleic anhydride) (PSMA). The PSMA alternating copolymer was synthesized by a traditional synthetic route, and was characterized by Fourier transform infrared spectroscopy (FTIR) analysis, nuclear magnetic resonance (¹H NMR) and gel permeation chromatography technique (GPC). The PES/PSMA membrane was then transformed to carboxylic PES/PSMA-H carboxylic membrane using sodium hydroxide solution, by which the anhydride groups were transformed to carboxyl groups, and the modified membranes showed excellent pH-sensitivity and pH-reversibility. Furthermore, the alternating copolymer modified PES hollow fiber membranes showed evident hysteresis of water flux, for which it would take several hours to reach the equilibrium state.