膜科学与技术

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U-shaped PEBA hollow fiber pervaporation membrane module and its alcohol permselectivity performance

Authors： REN Jiashuo, QIN Zhenping, WANG Naixin, Liu Tong, Ni Hongxu, An Quanfu

Units： Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China

KeyWords： U-shaped hollow fiber composite membrane, PEBA, pervaporation, alcohol permselectivity.

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(4):1-8

Abstract：

Polyvinylidene fluoride (PVDF) hollow fiber ultrafiltration membrane was used to construct a hollow fiber membrane module with U-shape structure. The polyether amide block copolymer (PEBA) was assembled on the surface of PVDF membrane by dip-coating and lifting method. The PEBA/PVDF hollow fiber composite membrane was obtained with alcohol permselectivity. The morphology and chemical properties of PVDF membrane before and after assembly were analyzed and characterized. The effects of preparation conditions such as PEBA concentration, drying temperature, drying time and lifting speed on the separation performance of composite membrane were studied. The effects of operating conditions such as feed temperature and feed flow rate on the membrane were also investigated. In addition, the stability of PEBA/PVDF hollow fiber pervaporation composite membrane module with U-shaped structure and the separation performance of ABE fermentation broth simulation system were investigated. The results showed that PEBA/PVDF hollow fiber composite membrane had a permeation flux of 2720 g /（m2·h） and a separation factor of 17.38 in the separation of 1 % （mass fraction）n-butanol/water system, showing a good pervaporation performance.

Funds：

国家自然科学基金项目（21776003）

AuthorIntro：

任家硕（1996-），男，山东济南人，硕士生，主要从事渗透汽化膜的制备研究

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