交联聚乙烯醇膜制备优化及在电吸附中的应用

doi:10.3969/j.issn.1000-5641.201931003

摘要/Abstract

摘要： 采用化学交联法制备聚乙烯醇(PVA)复合膜, 研究磺基琥珀酸(SSA)交联聚乙烯醇薄膜的电容去离子行为. 磺基琥珀酸作为一种交联剂和亲水基团的给体, 可以很好地应用于聚乙烯醇膜的改性. 详细研究了制备工艺(交联剂含量, 交联温度)对复合膜电容去离子性能的影响, 并进行对比实验, 将电容去离子系统(CDI)(仅使用活性炭电极)和采用了PVA与SSA交联的膜电容去离子系统(MCDI)(电极表面覆盖离子交换膜)分别进行吸脱附运行操作. 结果表明: 当交联剂SSA的质量分数为5%, 交联温度为100 ℃时, 交联聚乙烯醇复合膜在电容去离子中的应用使电极的吸附量增强了15%左右, 电荷效率平均提高了25%.

关键词: 离子交换膜, 磺基琥珀酸, 聚乙烯醇复合膜, 电容去离子

Abstract: Sulfosuccinic acid (SSA) can be used as a crosslinking agent and a donor of a hydrophilic group when fabricating a cation exchange membrane. In this study, SSA was crosslinked with polyvinyl alcohol to form a cation exchange membrane for a capacitive deionization system. In this study, the impact of manufacturing parameters (i.e., crosslinker content, crosslinking temperature) on the deionization performance of a composite membrane were investigated in detail. A comparison was made between a capacitive deionization system (CDI) without an ion exchange membrane and a membrane capacitive deionization system (MCDI) coated with a PVA/SSA layer. The results show that the adsorption capacity and charge efficiency can be enhanced by 15% and 25%, respectively, with the PVA/SSA membrane layer; furthermore, the optimal mass fraction of SSA is 5%, and the optimal crosslinking temperature is 100 ℃.

Key words: ion-exchange membrane, sulfosuccinic acid, polyvinyl alcohol composite membrane, capacitive deionization

中图分类号:

P747⁺.99

陈玲, 毛疏笛, 张奕, 李哲, 朴贤卿, 孙卓, 赵然. 交联聚乙烯醇膜制备优化及在电吸附中的应用[J]. 华东师范大学学报（自然科学版）, 2020, 2020(2): 120-130.

CHEN Ling, MAO Shudi, ZHANG Yi, LI Zhe, PIAO Xianqing, SUN Zhuo, ZHAO Ran. Preparation and application of crosslinked polyvinyl alcohol in electrosorption[J]. Journal of East China Normal University(Natural Science), 2020, 2020(2): 120-130.

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