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Preparation and characterization of PPESK ultrafiltration membrane modified by TiO2 sol
Authors： ZHAO Shanshan, WANG Peng*, ZHANG Linhuan, SUN Xin
Units： School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China
KeyWords： Poly (phthalazine ether sulfone ketone) (PPESK); TiO2; sol-gel; hydrophilicity; high temperature condensed water
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2013, 33(4):47-52

Abstract：

TiO2 sol was prepared using sol-gel method and the reaction conditions were optimized. PPESK/TiO2 organic-inorganic hybrid ultrafiltration (UF) membranes with different TiO2 concentrations were prepared by phase inversion method. The effects of TiO2 concentration on the morphologies and properties were investigated through SEM, water contact angle and UF experiments. The results showed that the optimal reaction conditions for TiO2 sol preparation were acetic acid 2 mL, deionized water 2 mL and NMP 20 mL. Under the conditions, the gelation time was 42.5 h. The penetrated finger-like pore structure in sublayer was suppressed, and sponge-like structure began to be developed. The porosity, hydrophilicity and anti-fouling properties have been obviously improved. When TiO2 concentration was 0.4 %, the pure water flux was increased from 310 L•m-2•h-1 to 427 L•m-2•h-1, and the flux recovery rate of membrane was 95.2 %. However, excess TiO2 concentration caused the aggregation of nanoparticles resulting in the performance decline. Compared with PPESK membrane, the PPESK/TiO2 organic-inorganic hybrid UF membrane was better for the purification of high temperature condensed water, showing higher removal efficiency.

Funds：
国家自然科学基金创新团队项目（项目编号：50821002）

AuthorIntro：
赵姗姗（1983- ），女，河北唐山人，博士研究生，超滤和纳滤膜制备及应用。 通讯作者：pwang73@hit.edu.cn

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