Membrane Science and Technology

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Effects of TiO2 nanoparticles on the performances of PVDF ultrafiltration membrane

Authors： SUN Xiuli1, LI Weiying2*, WEN Chen3

Units： 1. Environmental Science and Engineering School, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Yangtze River Water Environment, Ministry of education, Tongji University, Shanghai 200092, China; 3.Environmental and Chemical Engineering School, Tianjin Polytechnic University, 300160, China.

KeyWords： PVDF membrane; Nano-TiO2 sol; Anti-fouling performance

ClassificationCode：TU991.2

year,volume(issue):pagination： 2011, 31(4):17-21

Abstract：

Two kinds of nano-titanium dioxide (TiO2) sols were made in this experiment, and different poly(vinylidene fluoride) (PVDF)/ TiO2 hybrid membranes were prepared with different doses of them as the modifier. The tests, such as membrane flux, retention rate and contact angle, were carried out in order to verify the effects of various kinds and concentrations of nano-TiO2 sol on the PVDF/TiO2 hybrid membrane properties. Some membranes of good proprieties were then chosen, and the structure and micro-morphology of them were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The results showed that both sols can improve the properties of the membranes and the optimal concentration of the nano-TiO2 sol was 10%. The contact angle was significantly lowered (from 83° to 60°), and the water flux of the hybrid membrane (which could reach as high as 257.87 L/m2 h) was improved evidently with little change of the bovine serum albumin interception rate. Besides, results from XRD and SEM showed that PVDF/TiO2 hybrid membranes had more hydroxyls and a smoother surface.

Funds：

苏州市重点科技支撑项目(ZS0801);国家水体污染控制与治理科技重大专项课题(2008ZX07421-006)

AuthorIntro：

孙秀丽(1986- ),女,山东潍坊人,硕士研究生,研究方向为水处理理论与膜处理技术. 通讯作者：李伟英(1968-),女,博士, 安徽宿州人,副教授,研究方向为水处理理论与膜处理技术, 电话13601895068, E-mail : 123lwyktz@tongji.edu.cn; 文晨(1959-),女,博士,湖南宁乡人,教授,研究方向为膜材料改性与水处理技术, 电话:13512276822, E-mail: wenchen@tjpu.edu.cn

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