PEI交联的PECH/nylon复合阴离子交换膜的制备及性能研究

姜玉良1 刘元伟1,2 韩波1 阮慧敏1,3 沈江南1,3 高从堦1,3

(1.浙江工业大学海洋学院, 浙江杭州 310014)
(2.滨州学院化工与安全学院, 山东滨川 256600)
(3.浙江工业大学膜分离与水科学技术中心, 浙江杭州 310014)

【摘要】聚环氧氯丙烷 (PECH) 是一种线性高分子聚合物, 具有较好的稳定性和成膜性能, 且以PECH为基体制备阴离子交换膜, 可避免致癌物质如氯甲醚、双氯甲醚的使用, 但存在机械强度差与吸水性较大等缺点。本研究采用聚乙烯亚胺 (PEI) 作为交联剂, 通过其与PECH发生交联反应, 在其内部形成网状结构限制PECH膜在水中的过度溶胀, 从而增强膜的机械强度, 同时引入尼龙网布 (nylon) 作为支撑材料进一步提高膜的力学性能, 制备了QCPECH/nylon复合阴离子交换膜。研究结果表明, 制备的P1膜在电渗析应用过程中的脱盐效率 (94.8%) 比商业膜 (Neosepta AMX) 的脱盐效率 (92.4%) 更高, 由此可见, 用PEI交联的PECH/nylon复合阴离子交换膜在电渗析脱盐中具有潜在的发展前景。

【关键词】 阴离子交换膜; 交联; 聚环氧氯丙烷; 电渗析; 脱盐;

【DOI】

【基金资助】 国家自然科学基金项目 (21676249) 国家自然科学基金项目 (21676249) 国家重点研发计划 (2017YFC0403701) 国家重点研发计划 (2017YFC0403701)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 06, Pages 2744-2752

June 2018

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摘要

  • 引言
  • 1 实验部分
  • 2 结果与讨论
  • 3 结论
  • 参考文献