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The effect of the composite catalyst on structure and performance of the polyamide thin-film composite membrane

Authors： Wang Yuan，Wang Lei，Wang Xudong，Lv Yongtao

Units： Xi’an University of Architecture and Technology, Xi’an 710055, China

KeyWords： nanofiltration membrane；interfacial polymerization；composite catalyst；urtra-thin skin layer

ClassificationCode：TQ316.4

year,volume(issue):pagination： 2015,35(3):1-6

Abstract：

Abstract：Polyamide thin-film composite membrane was prepared through interfacial polymerization between m-phenylenediamine (MPD) and trimesoyl chloride (TMC) on the polysulfone (PSF) support membrane. The effect of the composite catalyst (triethylamine (TEA) and camphorsulfonic acid (CSA) ), as well as the reaction conditions on the ultra-thin poly skin layer structure and performance of the nanofiltration membrane were systematically investigated. Results show that the the ultra-thin skin layer density increased, the surface roughness and the hydrophilicity contact angle decreased, and the water flux increased dramatically, while the changes to the rejection and the selecting sequence for salt of nanofiltration membrane have been very minor, as the TEA concentration in the composite catalyst increased from 0.5 wt % to 3 wt % and the molar ratio of TEA and CSA fixed at 1/2. When the concentration of TEA is 2 wt%, reaction time is 40 s, curing temperature is 80°C, curing time is 3 min，the composite nanofiltration membrane exhibited good performance that the rejection of 2 g/L MgSO4 solution was 93.2% , and the water flux was 16 L/m2h. Polyamide thin-film composite separation performance was stable at 0.2 ~ 1.0 MPa.

Funds：

国家自然科学基金项目（No.51178378; No.51278408）；陕西省科技创新（No.2012KTCL03-06;No.2013KTCL03-16）;

AuthorIntro：

西安建筑科技大学创新团队;作者简介：王元 (1989—)，女，山东济宁人，硕士研究生，主要从事聚酰胺复合纳滤膜制备研究，834956462@qq.com，18220482473；王磊（1971—），男，教授，博士生导师，主要从事水污染控制及废水再生等理论与技术的研究，通讯联系人，wl0178@126.com，西安建筑科技大学环境与市政工程学院，邮编710055

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