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Preparation and Properties of SiO2-PWA/PVDF Hybrid Cationic Exchange membran

Authors： ZHANG Yatao, WANG Sanfan*,ZHOU Jian, ZHANG Shaobo

Units： (1.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University,Lanzhou 730070, China; 2. Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou 730070, China)

KeyWords： cobalt electrowinning by membrane ;SiO2-PWA/PVDF hybrid membrane; chloride ion barrier; acid and oxidation resistance; chloride leakage rate

ClassificationCode：TQ050.4+25

year,volume(issue):pagination： 2018,38(5):62-68

Abstract：

The cation exchange membranes for cobalt electrowinning usage need to have excellent barrier property to chloride ion, and high acid and oxidation resistance.To address this problem,polyvinylidene hybrid cation exchange membrane of silica immobilized phosphotungstic acid(SiO2-PWA/PVDF) was prepared by hot-pressing method . The leakage rate of chloride ion was used as the evaluation index to study the chloride ion barrier property and acid resistance and oxidation resistance of the membrane , and the surface morphology and functional group of the membrane were characterized by SEM and FTIR.When the molar ratio of TEOS to PWA was 5: 1, the additive amount of SiO2-PWA was 20% and the hot pressing temperature was 180 ℃, the hybrid cation exchange membrane has the best performances. The leakage rate of chlorine ion was 7.5, and the acid and oxidation resistance was relatively good. The hybrid cation exchange membrane has the potential to be applied to the cobalt electrowinning by membrane .

Funds：

国家科技支撑计划项目（2015BAE04B01）；国家自然科学基金项目（21466019）；甘肃省省青年科技基金计划（17JR5RA088）；兰州交通大学优秀平台基金Lzitu(201606)支持

AuthorIntro：

第一作者简介：张亚涛（1991-），男，甘肃庆阳市人，兰州交通大学硕士研究生，主要研究方向为：离子交换膜的制备及改性，联系电话：18119342551，E-mail:1296751183@qq.com。通讯作者：，E-mail:Sfwang1612@163.com 。

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