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基于无C=O基主链的双功能侧链阴离子交换膜

作者：刘晋武¹，刘畅¹，张扬¹，鞠佳¹，崔珺²，张帆¹

单位： 1. 辽宁石油化工大学石油化工学院，抚顺 113001； 2. 沈阳工学院生命工程学院，抚顺 113000

关键词：无C=O基聚芳醚；疏水亲水双功能侧链；阴离子交换膜；离子电导率；碱性稳定性；单电池性能

DOI号： 10.16159/j.cnki.issn1007-8924.2026.02.012

分类号： TQ028； TM912.1

出版年,卷(期):页码： 2026,46(2):112-118

摘要：

为进一步提升阴离子交换膜（AEMs）在高浓度热碱性环境下的综合性能，本研究将疏水亲水双功能侧链“并联”引入无吸电子CO基聚芳醚主链，构建新型结构阴离子交换膜。无吸电子CO基聚芳醚可有效避免主链降解，疏水亲水双功能侧链可协同优化离子传输通道并提供空间保护作用，二者协同提升膜的综合性能。研究表明亲疏水侧链长度均为6个碳时，膜PEAMQC6H6的综合性能最佳。此时，膜的溶胀率为9.0%（80 ℃），拉伸强度为38.9 MPa，80 ℃时OH-离子电导率高达140.3 mS/cm，且在4 mol/L KOH、80 ℃条件下浸泡1 500 h后，电导率保持率达92.4%。此外，PEAMQC6H6组装的单电池功率密度高达1.18 W/cm2（80 ℃)。该研究为开发高性能阴离子交换膜提供了新思路。

To enhance the overall performance of anion exchange membranes (AEMs) under harsh, hot alkaline conditions, a novel membrane architecture was designed by integrating hydrophobic-hydrophilic dual-functional side chains in a parallel configuration onto a CO-free poly(arylene ether) backbone. The CO-free backbone was employed to mitigate alkaline-induced backbone degradation, while the dual-functional side chains were intended to synergistically facilitate the formation of efficient ion-conducting pathways and provide steric protection for the cationic groups. AEMs with varying side chain lengths were synthesized and characterized. The membrane incorporating hexyl chains for both functionalities (PEAM-QC6H6) demonstrated the most balanced property profile. It exhibited a low swelling ratio of 9.0% at 80 ℃, a tensile strength of 38.9 MPa, and a high hydroxide conductivity of 140.3 mS/cm at 80 ℃. Remarkably, it retained 92.4% of its initial conductivity after being immersed in 4 mol/L KOH at 80 ℃ for 1 500 hours. Furthermore, a H2/O2 fuel cell assembled with the PEAMQC6H6 membrane achieved a peak power density of 1.18 W/cm2 at 80 ℃. This work provides a promising strategy for the molecular design of durable, high-performance AEMs.

基金项目：

国家自然科学基金项目（22408144）；辽宁省教育厅高等学校基本科研项目（青年项目）（JYTQN2023347，JYTQN2023350）；辽宁省科技计划联合计划（自然科学基金面上项目）（2025-MSLH-458，2025-MSLH-459）；辽宁石油化工大学引进人才科研启动基金资助项目（2023XJJL-010，2023XJJL-011）

作者简介：

刘晋武(1998-)，男，山西忻州人，硕士，从事阴离子交换膜研究

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