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Preparation and characterization of thin-?lm composite polyamide nano?ltration membranes

Authors： WANG Lei, HU Jiarui, MIAO Rui, LV Yongtao, WANG Xudong

Units： School of Environmental and Municipal Engineering, Xi’an university of Architecture and Technology, Xi’an 710055

KeyWords： composite nanofiltration membrane；1,3-phenylenediamine；trimesoyl chloride；interfacial polymerization

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014,34(5):16-21

Abstract：

Polyamide thin-?lm composite membranes were prepared by interfacial polymerization of 1,3-phenylene diamine (PDA) and trimesoyl chloride(TMC) on polysulfone(PSF) ultrafiltration membrane. The effect of interfacial polymerization conditions on the separation performance of composite membrane and the composite membrane separation properties for different salt solutions were systematically investigated. The surface morphology and contact angle of the composite and substrate membranes were analyzed by atomic force microscopy (AFM) and contact angle measurements, respectively. Results show that the optimum polymerization conditions are as follows: the concentration of PDA is 1.5 wt%, the concentration of TMC is 0.1 wt%, the soaking time in aqueous phase is 3 min, reaction time is 20 s, curing temperature is 80 ℃,curing time is 3 min. The membrane prepared under the optimum conditions exhibited a rejection of 95.6% to 2000 mg/L MgSO4 aqueous solution, a pure water flux of 7 L•m-2•h-1 and a salt rejection order of Na2SO4＞MgSO4＞NaCl＞MgCl2 when tested under 0.6 MPa. Moreover , the changes of morphology and contact angle showed that a polyamide active layer was formed on the substrate by interfacial polymerization.

Funds：

国家自然科学基金项目（51008243，51178378，51278408）；陕西省科技统筹创新工程计划项目（2012KTCL03-06）；陕西省教育厅专项（2013JK0884）

AuthorIntro：

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等的研究。联系电话：13509182229; Email:wl0178@126.com

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