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Effect of draw ratio on the morphology and performance of seven-bore polysulfone hollow fiber membranes during spinning process

Authors： ZHANG Jiemin, ZHAO Baobao, XU Tiancheng, LI Shiwen, FU Zhengang, LI Jianxin*,

Units： State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China

KeyWords： Seven-bore hollow fiber membrane; polysulfone (PSf); Draw ratio; Immersion phase precipitation

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2014,34(6):6-10

Abstract：

Polysulfone(PSf) as a fundamental membrane material，N, N-dimethy lacetamide ( DMAc) as a solvent and polyethylene glycol(PEG) as an additive were used to prepare seven-bore polysulfone hollow fiber membranes via immersion phase precipitation. The effects of draw ratio on the morphologies and performances of PSf hollow fiber membranes were investigated. The results show that the outer diameter of the hollow fiber membrane, the inner diameter of the small bores, the distance between the small bores and the thickness of the dense layer of the small bores decreased with the increase of draw ratio. Meanwhile, the pure water permeation flux increased from 96.5 L/(m2·h) to 131.7 L/(m2·h) with the increase of draw ratio. Besides, BSA rejection, the breaking force and the elongation of the hollow fiber membranes decreased with the increase of draw ratio.

Funds：

科技部国际科技合作项目(2010DF51090)

AuthorIntro：

张洁敏(1989-)，女，山东青州市人，硕士研究生，主要从事中空纤维膜制备。

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