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Highly chlorine-resistant sulfonated copoly (phthalazinone biphenyl ether sulfone) composite nanofiltration membranes

Authors： GUAN Shanshan1, ZHANG Shouhai1,3,4*, WANG Xiaoli1, LIU Peng1, JIAN Xigao1,2,3,4*

Units： 1. School of Chemical Engineering, Dalian University of Technology;

KeyWords： nanofiltration membrane; chlorine resistance;polyethersulfone; phthalazinone

ClassificationCode：

year,volume(issue):pagination： 2013,33(4):17-22

Abstract：

Most commercial composite nanofiltration（NF）membranes are very sensitive to a chlorine disinfectant. The oxidative degradation takes place under active chlorine conditions. The free chlorine in feed stream can cause degradation of nanofiltration membranes and ultimately result in the decline of the membrane separation performance, which shortens the membrane life and greatly limits the further application and development of NF membranes. Sulfonated copoly (phthalazinone biphenyl ether sulfone) (SPPBES) has high thermal stability and chlorine resistance. A series of thin composite nanofiltration membranes (SPPBES-1,SPPBES-2,SPPBES-3) were prepared by coating sulfonated copoly (phthalazinone biphenyl ether sulfone) on poly (phthalazinone ether sulfone ketone) ultrafiltration support membranes. In this work, the chlorine resistance of sulfonated copoly (phthalazinone biphenyl ether sulfone) (SPPBES) composite nanofiltration membranes was discussed. The effects of chlorine exposure time, chlorine concentration and pH of NaClO on the performance of composite membranes were investigated. The rejection to the NaCl increased with the increase of chlorine concentration. These membranes displayed the long-term stability for 30 days under chlorine concentration of NaClO 300 ppm. SPPBES composite membrane showed good stability in sodium hypochlorite at pH 4-12.

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AuthorIntro：

观姗姗（1987-），女，山东济南市人，博士生，从事纳滤膜的制备及研究。联系人，;

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