| 基于二苯并-18-冠-6基体改性的K+选择性离子交换膜的制备及性能研究 |
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| 引用本文： | 杨珊珊,姚宇洋,董云迪,徐志鹏,高尚上,阮慧敏,沈江南.基于二苯并-18-冠-6基体改性的K+选择性离子交换膜的制备及性能研究[J].化工学报,2022,73(4):1781-1793. |
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| 作者姓名： | 杨珊珊 姚宇洋 董云迪 徐志鹏 高尚上 阮慧敏 沈江南 |
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| 作者单位： | 1.浙江工业大学化学工程学院，浙江 杭州 310014;2.石家庄学院化工学院，河北 石家庄 050035 |
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| 基金项目： | 浙江省重点研发计划项目;浙江省自然科学青年基金项目;国家自然科学基金 |
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| 摘 要： | 基于18-冠-6醚环腔体可与K+形成1∶1型稳定的络合物，通过掺杂的方式将4，4'-二氨基-二苯并-18-冠-6（A18C6）引入离子交换膜基材料中并成膜，然后利用1，3，5-苯三甲酰氯（TMC）对A18C6分子进行交联固定，制得一系列改性阳离子交换膜。通过改变A18C6的含量和TMC的反应时间来调控阳离子交换膜的基体结构，系统考察了改性膜在K+/Mg2+、K+/Na+ 和K+/Li+的二元体系中对K+的电渗析选择性。研究结果表明，在电流密度为5.0 mA·cm-2的条件下，最优膜M-A18C6-10%-T30在K+/Mg2+和K+/Li+体系中对K+的选择性（，）高于商业的单价选择性阳离子交换膜CIMS（）。A18C6的掺杂引入不仅提高了膜基体的致密性（孔径筛分效应），也为K+在膜基体中的传输提供了新的离子传输通道（离子-偶极作用）。
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| 关 键 词： | 膜 电渗析 离子交换 4 4'-二氨基-二苯并-18-冠-6 选择性 |
| 收稿时间： | 2021-12-30 |
Preparation and performance of ion exchange membrane with K+selectivity based on dibenzo-18-crown-6 modification |
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| YANG Shanshan,YAO Yuyang,DONG Yundi,XU Zhipeng,GAO Shangshang,RUAN Huimin,SHEN Jiangnan.Preparation and performance of ion exchange membrane with K+selectivity based on dibenzo-18-crown-6 modification[J].Journal of Chemical Industry and Engineering(China),2022,73(4):1781-1793. |
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| Authors: | YANG Shanshan YAO Yuyang DONG Yundi XU Zhipeng GAO Shangshang RUAN Huimin SHEN Jiangnan |
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| Affiliation: | 1.College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;2.College of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035, Hebei, China |
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| Abstract: | Based on the fact that the 18-crown-6 ether ring cavity can form a 1∶1 stable complex with K+, 4,4'-diamino-dibenzo-18-crown-6 (A18C6) was introduced into the ion-exchange membrane-based material and formed into a membrane, and then A18C6 molecules were cross-linked and immobilized with 1,3,5-benzenetricarbonyl chloride (TMC) to obtain a series of modified cation-exchange membranes. By changing the content of A18C6 and the reaction time of TMC to adjust the matrix structure of CEMs, the ED permselectivity to K+ for the modified membranes in binary systems of K+/Mg2+, K+/Na+ and K+/Li+ were systematically investigated. At a constant current density of 5.0 mA·cm-2, the modified membrane M-A18C6-10%-T30 shows prominent permselectivity to K+ in K+/Mg2+ and K+/Li+ binary systems (,), which is superior to commercial monovalent selective cation exchange membrane (MSCEM) CIMS (). The introduction of A18C6 improves the compactness of membrane matrix (pore-size sieving effect) and further provides new ion transport channels for K+ (ion-dipole interaction). |
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| Keywords: | membranes electrodialysis ion exchange 4 4'-diamino-dibenzo-18-crown-6 selectivity |
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