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季铵化聚苯醚和UiO-66修饰的类“三明治”结构复合膜的制备

作者：阮慧敏，许婧雯，潘能修，高尚上，廖俊斌，沈江南

单位：浙江工业大学化学工程学院，杭州 310014，中国

关键词：季铵化聚苯醚；UiO-66复合膜；一/二价阴离子分离；电渗析

DOI号：

分类号： O658.6+8

出版年,卷(期):页码： 2022,42(6):31-40

摘要：

以阳极氧化铝（AAO）为支撑层，采用季铵化聚苯醚（QPPO）与金属有机框架材料UiO-66-NH2分别对其两侧进行表面修饰，制备了系列类“三明治”结构复合膜并研究了改性层对所制备的复合膜的膜面电阻和亲水性等的影响规律。电渗析测试结果表明：UiO-66-NH2单独作为分离层时，其选择性为=15，显著大于QPPO层的选择性（1）。对于复合膜，其选择性近似，其值为=7.12。UiO-66-NH2的高选择性可归因于其孔尺寸对不同尺寸离子的精确筛分。然而，QPPO改性层较低的选择性限制了复合膜选择性筛分离子的能力，从而导致复合膜单价离子选择性不如单层UiO-66-NH2-AAO膜.

A series of “sandwich-like” structure composite membranes has been prepared by modifying the anodic alumina (AAO) membrane as support layer with quaternized polyphenylene oxide (QPPO) and UiO-66-NH2, which were used for surface modification on each side, and the influence of the modified layers on the surface resistance and hydrophilicity of the prepared composite films was investigated. Electrodialysis test results show, the investigation demonstrates that the selectivity of UiO-66-NH2 layer is 15, which is higher than that of QPPO layer (1). However, as for the composite membrane, the selectivity of the two as separation layers is approximately (7.12). The high selectivity of UiO-66-NH2 may result from its pore size, which accurately screens ions with different sizes. However, the low selectivity of QPPO layer limits the ability of the composite membrane to selectively screen separators, resulting in that the monovalent ion selectivity of the composite membrane is not as good as that of the monolayer UiO-66-NH2-AAO membrane.

基金项目：

浙江省重点研究发展计划（No. 2021C03170）；国家自然科学基金项目（No. 21878273和No. 22008214）；浙江省自然科学基金资助项目（No. LQ20B060005）.

作者简介：

阮慧敏（1976–），女，浙江玉环，副教授，研究生，博士，研究方向为膜法水处理技术、海水综合利用

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