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Preparation of Proton Conductive Membranes using Layer-by-layer Interfacial Polymerization Processes

Authors： GuoWeinan, Wu Xuran, Qing Geletu, Fan Yongsheng, Wang Baoguo

Units： Department of Chemical Engineering, Tsinghua University, Beijing 100084

KeyWords： proton conductive membrane;interfacial polymerization;electric conductivity;ion selectivity;charge density

ClassificationCode：TQ152

year,volume(issue):pagination： 2014,34(4):6-11

Abstract：

Layer-by-layer interfacial polymerization method was used to form super-thin selective layer on PVDF ultrafiltration membrane surface, using polyethylene polyamine and 1,3,5-benzenetricarbonyl trichloride as reactants. The membranes show good permeaselectivity for proton conductivity and resistance to VO2+, membrane performances are highly affected by the species of hydrophilic monomer reactant. Membranes prepared with Tetraethylenepentamine as the hydrophilic monomer showed better electrochemical performance, of which the conductivity reaches 8.0×10-3S/cm, VO2+ diffusion coefficient decreases by 90 percent, ion selectivity increases by 2.2 times to 60. Moreover, the ion selectivity of this membrane is highly related with the charge density of the used monomer in interfacial polymerization processes.

Funds：

国家自然科学基金资助项目（21276134）；国家高技术研究发展计划（863计划）（2012AA051203）;国家重点基础研究发展计划（973计划）项目（2010CB227202）

AuthorIntro：

王保国，教授，清华大学化工系，010-62788777，bgwang@tsinghua.edu.cn

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