膜科学与技术

界面聚合法中空纤维含氟聚酰胺纳滤膜制备与表征

作者：任翘楚，汤永健，许振良

单位：化学工程联合国家重点实验室，华东理工大学化学工程研究所膜科学与工程研发中心，上海200237

关键词：界面聚合；中空纤维；纳滤；含氟单体

出版年,卷(期):页码： 2016,36(3):93-97

摘要：

以聚砜（PSF）中空纤维超滤膜为基膜，2,2-二（1-羟基-1-三氟甲基-2,2,2-三氟乙基）-4,4-亚甲基双苯胺（BHTTM）为水相单体，均苯三甲酰氯(TMC)为有机相单体，采用界面聚合方法制备了中空纤维复合纳滤膜，分析了基膜和纳滤膜的微观结构、表面粗糙度、红外光谱和亲水性，讨论了不同反应时间、热处理时间、单体浓度等制备条件对纳滤膜性能的影响。结果表明：当水相1%（w/v）BHTTM、油相0.15%（w/v）TMC和界面聚合时间10s，并在60℃下热处理10min时，所得纳滤膜具有良好的分离性能，对于无机盐的截留率大小均为Na2SO4>MgSO4 >NaCl>MgCl2，纳滤膜表面带负电。

Using polysulfone (PSF) hollow fiber membrane as the supporting membrane, fluoropolyamide /polysulfone (PSF) hollow fiber thin film composite (TFC) nanofiltration (NF) membranes were prepared by the interfacial polymerization of 2,2’-bis(1-hydroxyl-1-trifluoromethyl-2,2,2-trifluoroethyl)-4,4’-methylenedianiline (BHTTM) and trimesoyl chloride (TMC). The morphology and surface properties of hollow fiber TFC NF membranes were characterized by scanning electron microscope (SEM), atomic force microscopy (AFM), attenuated total reflectance infrared (ATR-IR) and contact angle instrument. The experimental results showed that the hollow fiber TFC NF membrane prepared under the following condition gained the best performance: 1.0 % (w/v) BHTTM and 0.15% (w/v) TMC for 10s reaction and 10min heat treatment in 60℃. The rejections of the resulting NF membrane for different inorganic electrolyte solutions decreased in the following order: Na2SO4, MgSO4, NaCl, MgCl2, which was typical characteristics of negatively charged NF membranes.

作者简介：任翘楚（1990-），男，江苏启东人，硕士研究生，主要从事纳滤膜制备与膜法水处理研究工作。通讯联系人：许振良，Tel：021-64252989；Email：chemxuzl@ecust.edu.cn

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