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N,N’-双(3-氨丙基)甲胺为单体制备荷正电复合纳滤膜及其脱盐性能

作者：叶谦¹，李俊俊²，韩子龙¹，陈涛²，高从堦¹，潘巧明²

单位： 1，国家海洋局第二海洋研究所，浙江杭州 310012；2，杭州水处理技术研究开发中心，浙江杭州 310012

关键词：纳滤；荷正电膜；N,N’-双(3-氨丙基)甲胺；二乙烯三胺

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2016,36(5):53-59

摘要：

以N,N′-双(3-胺丙基)甲胺为水相单体，均苯三甲酰氯为油相单体，采用界面聚合的方法制备荷正电复合纳滤膜。通过在水相里添加二乙烯三胺，调节并最终优化该纳滤膜对硫酸镁的截留率。该复合纳滤膜对不同盐溶液的截留率顺序为MgCl2 > MgSO4 > NaCl > Na2SO4，其中MgCl2的截留率可保持在98%左右，MgSO4的截留率可以通过二乙烯三胺调节从75%上升至98%；一价阳离子盐（Na2SO4与NaCl）的截留率较低。通过扫描电子显微镜、衰减全反射红外光谱仪和X射线光电子能谱对代表性的纳滤膜的结构进行了表征。利用Zeta电位仪表征其表面荷电性质，用接触角测量仪测定膜表面的亲水性。

A positively charged composite nanofiltration membrane was prepared via interfacial polymerization with N, N'- bis (3-aminopropyl) methylamine as an aqueous phase monomer and trimesoyl chloride as an oil phase monomer. To adjust and finally optimize rejection rate of magnesium sulfate of the nanofiltration membrane, diethylenetriamine was added into the aqueous phase.The rejection rates of different inorganic salt by the composite nanofiltration membrane were MgCl2> MgSO4> NaCl> Na2SO4, and the retention rate of MgCl2 could be maintained at about 98%. The rejection rate of MgSO4 rose from 75% to 98% by adjusting the dosage of diethylenetriamine. The rejection rates of monovalent cation salt such as Na2SO4 and NaCl were small. The structures of some representative nanofiltration membranes were characterized by scanning electron microscopy, attenuated total reflection infrared spectroscopy and X-ray photoelectron spectroscopy. Zeta potential was used to characterize the surface charge, meanwhile, hydrophilic property of membrane surface was measured by using a contact angle measuring instrument.

基金项目：

浙江省海水淡化技术研究重点实验室项目（2012E10001 ）；杭州市创新链产业链重大创新项目（ 20132111A01）；工信部新材料产业化专项项目

作者简介：

第一作者简介（1991-），男，籍贯，主要从事膜材料研究，邮箱：zjyeqian@163.com，电话：18968405295。通讯作者信息：电子邮箱：panqm@chinawatertech.com。

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