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Preparation and pervaporation performances of PTFE-PDMS/PET composite membranes
Authors： SUN De 1、2, LI Bing-bing 2, XU Zhen-liang 1
Units： 1. State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Research Center, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China ;2. Department of Chemical Engineering, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, China
KeyWords： Polytetrafluoroetene; Polydimethylsiloxane; Pervaporation; Ethanol-water Solution.
ClassificationCode：TQ028. 8
year,volume(issue):pagination： 2013, 33(3):39-43

Abstract：

A novel composite membrane using micron polytetrafluoroetene (PTFE) powder filled polydimethylsiloxane (PDMS) as the top active layer and polyethylene terephthalate (PET) non-woven fabric as the support layer was prepared for the pervaporation of ethanol from water. The crystal structure, mechanical prosperities and swelling degree of composite membranes were characterized. With the increase of the PTFE content, the crystallinity of composite membrane increased but the swelling degree decreased. The elongation at break and the tensile stress of the PTFE ?lled PDMS membrane first increased and then decreased. The separation selectivity(?)and ethanol permeance (JE)increased quickly to the maximum then decreased slowly but water permeance(Jw) decreased with the increasing of PTFE content in filled PDMS membranes. When the content of the PTFE additive in PDMS composite membrane is 10wt. %, the ethanol permeance is the best.

Funds：
上海市科技攻关计划(11DZ1205201)

AuthorIntro：
孙德（1973-），男，博士研究生，副教授。主要从事膜分离技术研究。E-mail:sunde2002@126.com；通讯作者：许振良，电话:021-64252989；E-mail：chemxuzl@ecust.edu.cn。

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