膜科学与技术

三通道毛细管复合纳滤膜改进及其性能的研究

作者：孙晶莹，张海珍，穆彤，许振良

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

关键词： UiO-66-NH2；界面聚合；纳滤膜；表面活性剂

出版年,卷(期):页码： 2020,40(5):31-38

摘要：

以哌嗪(PIP)/聚乙烯亚胺(PEI)与UiO-66-NH2为水相体系，均苯三甲酰氯(TMC)为有机相，采用界面聚合法制备了荷正电三通道毛细管复合纳滤膜，讨论了UiO-66-NH2的添加量对所制备纳滤膜形貌和性能的影响。采用红外光谱(ATR-FTIR)、扫描电镜(SEM)、原子力显微镜(AFM)、水接触角测量仪(WCA)、Zeta电位仪等对膜进行了表征。结果表明，UiO-66-NH2颗粒的加入，使得纳滤膜表面产生大量的褶皱，表面积增加，亲水性增强，渗透性能得以改善。当添加量为0.005 wt%时，纳滤膜M-2纯水通量111 Lm-2h-1MPa-1。将所制备的纳滤膜M-2用于阳离子表面活性剂模拟废水的分离，该膜对十六烷基三甲基溴化铵的截留率高于95%，对阳离子表面活性剂显示良好的去除能力。

Positive charged three-channel capillary thin-film composite (TFC) nanofiltration (NF) membrane was prepared via interfacial polymerization using PEI, PIP and UiO-66-NH2 as aqueous monomers and TMC as organic monomers. The effects of different UiO-66-NH2 additive amounts on the structure and performance of the prepared membrane were discussed. The NF membranes were characterized by Fourier infrared spectroscopy (ATR-RTIR), scanning electron microscopy (SEM), AFM, water contact angle and Zeta potential. The results showed that adding UiO-66-NH2 nanoparticles resulted in a large number of folds on the membrane surface, which increased surface area, enhanced hydrophilicity and improved permeability. When the additive amount was 0.005wt %, pure water flux of NF membrane M-2 was 111 Lm-2h-1 MPa-1, which can be used for the separation of cationic surfactant simulated wastewater. NF membrane M-2 for hexadecyl trimethylammonium bromide was higher than 95%, showing a good removal ability to cationic surfactants.

孙晶莹(1995-)，女，江苏江阴，研究生在读，主要从事纳滤膜制备及其水处理研究工作。

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