[1]刘颖,范可可,李志猛,等.UiO-66-SO3H改性阳离子交换膜选择性增强机制[J].中国给水排水,2026,42(15):30-37.
　LiuYing,FanKeke,LiZhimeng,et al.Fabrication of UiO-66-SO3H Modified Cation Exchange Membranes and Mechanism for Enhanced Ion Selectivity[J].China Water & Wastewater,2026,42(15):30-37.
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UiO-66-SO3H改性阳离子交换膜选择性增强机制

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第15期 页码: 30-37 栏目: 出版日期: 2026-08-01
Title:
Fabrication of UiO-66-SO3H Modified Cation Exchange Membranes and Mechanism for Enhanced Ion Selectivity
作者:
刘颖1， 范可可1， 李志猛2， 李国金3,4， 常素云5， 赵云峰6， 陈锋7， 张新波1
（1.天津城建大学环境与市政工程学院 水质科学与技术天津市重点实验室，天津 300384；2.天津城建大学 控制与机械工程学院，天津 300384；3.天津市政工程设计研究总院有限公司，天津 300392；4.天津市基础设施耐久性企业重点实验室，天津 300042；5.天津市水利科学研究院，天津 300061；6.国家管网集团北方管道有限责任公司，河北 廊坊 065000；7.北华航天工业学院 建筑工程学院，河北 廊坊 065000）
Author(s):
Liu　Ying1， Fan　Keke1， Li　Zhimeng2， Li　Guojin3,4， Chang　Suyun5， Zhao Yunfeng6， Chen Feng7， Zhang　Xinbo1
（1. Tianjin Key Laboratory of Water Quality Science and Technology， School of Environmental and Municipal Engineering， Tianjin Chengjian University， Tianjin 300384， China； 2. School of Control and Mechanical Engineering， Tianjin Chengjian University， Tianjin 300384， China； 3. Tianjin Municipal Engineering Design and Research Institute Co. Ltd.， Tianjin 300392， China； 4. Tianjin Key Laboratory of Infrastructure Durability， Tianjin 300042， China； 5. Tianjin Water Resources Research Institute， Tianjin 300061， China； 6. National Pipeline Network Group Northern Pipeline Co. Ltd.， Langfang 065000， China； 7. School of Civil Engineering and Architecture， North China Institute of Aerospace Engineering， Langfang 065000， China）
关键词:
海水淡化;  电渗析;  阳离子交换膜;  单价选择性;  UiO-66-SO3H
Keywords:
seawater desalination;  electrodialysis;  cation exchange membrane;  monovalent selectivity;  UiO-66-SO3H
摘要:
电渗析海水淡化技术备受关注，其核心组件阳离子交换膜的性能至关重要。针对传统阳离子交换膜单价离子选择性差的问题，采用层层自组装法，以聚多巴胺（PDA）为黏附层，引入聚乙烯亚胺（PEI）与磺酸功能化金属有机框架（UiO-66-SO3H）复合层，提出了PDA/PEI/UiO-66-SO3H三重协同改性策略，制备了选择性阳离子交换膜。探究了改性膜的微观结构、表面性质及离子分离性能。结果表明，UiO-66-SO3H纳米颗粒可稳定、高效地负载于膜表面，膜亲水性与离子交换容量显著提高，Na+/Mg2+单价选择性由2.12提升至32.83，Li+/Mg2+选择性由0.99提升至14.75，展现出优异单价离子筛分能力。该策略实现了尺寸筛分、静电吸引与离子水合特性调控的有效整合，三者协同增强机制是改性膜实现高单价选择性的关键。
Abstract:
Electrodialysis (ED) desalination technology has attracted considerable attention, with the performance of its core component, the cation exchange membrane (CEM), being of paramount importance. To address the poor monovalent ion selectivity of conventional CEMs, this study employed a layer-by-layer self-assembly method, utilizing polydopamine (PDA) as an adhesive layer and introducing a composite layer of polyethyleneimine (PEI) and sulfonated metal-organic framework (UiO-66-SO3H). A PDA/PEI/UiO-66-SO3H triple synergistic modification strategy was proposed, leading to the fabrication of a selective cation exchange membrane. The microstructure, surface properties, and ion separation performance of the modified membrane were systematically investigated. Results indicated that UiO-66-SO3H nanoparticles could be stably and efficiently immobilized on the membrane surface, significantly enhancing membrane hydrophilicity and ion exchange capacity. The monovalent ion selectivity for Na+/Mg2+ increased remarkably from 2.12 to 32.83, and that for Li+/Mg2+ from 0.99 to 14.75, demonstrating excellent monovalent ion sieving capability. This strategy effectively integrates size sieving, electrostatic attraction, and regulation of ion hydration properties, with the synergistic enhancement mechanism identified as the key to achieving high monovalent selectivity in the modified membrane.

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更新日期/Last Update: 2026-08-01