自交联聚芳基哌啶阴离子交换膜的制备及电解水性能
Preparation and Water Electrolysis Performance of Self-crosslinked Poly(aryl piperidinium) Anion Exchange Membranes
孔令涵 1袁伟1
作者信息
- 1. 重庆大学化学化工学院，重庆 401331
- 折叠
摘要
为改善阴离子交换膜水电解用AEM在OH?传导、尺寸稳定性和湿态力学性能之间的匹配关系，本文设计了自交联聚芳基哌啶阴离子交换膜。通过引入含溴戊基侧链的芴类单体BrC5-FL，在聚芳基哌啶主链中预埋自交联位点，经KOH诱导侧链自交联和MeI季铵化，制备SC-QPFTP-x系列膜。结果表明，自交联网络可降低膜的吸水率和溶胀率，并提高湿态机械强度。其中，SC-QPFTP-15的吸水率和溶胀率分别降至33.0%和11.1%，SC-QPFTP-10的湿态拉伸强度达到33.2 MPa。适度自交联样品SC-QPFTP-5在80 ℃下OH-电导率达到186.9 mS cm-1，经1 M KOH、80 ℃老化2160 h后仍保持91.15%的初始电导率，并在AEMWE单电池中于2.0 V下实现3.40 A cm-2的电流密度。结果说明，自交联策略有助于改善聚芳基哌啶AEM的综合性能，可为AEMWE膜材料设计提供参考。
Abstract
To improve the balance between OH? conduction, dimensional stability and wet mechanical properties of anion exchange membranes for water electrolysis, self-crosslinked poly(aryl piperidinium) anion exchange membranes were designed in this work. A fluorene monomer bearing bromopentyl side chains, BrC5-FL, was introduced into the poly(aryl piperidine) backbone to provide self-crosslinkable sites. The SC-QPFTP-x membranes were prepared through KOH-induced side-chain self-crosslinking followed by MeI quaternization. The results show that the self-crosslinked network reduces water uptake and swelling while improving wet mechanical strength. SC-QPFTP-15 exhibits water uptake and swelling ratio of 33.0% and 11.1%, respectively, and SC-QPFTP-10 reaches a wet tensile strength of 33.2 MPa. With a moderate self-crosslinking degree, SC-QPFTP-5 shows an OH- conductivity of 186.9 mS cm-1 at 80 ℃, retains 91.15% of its initial conductivity after aging in 1 M KOH at 80 ℃ for 2160 h, and delivers a current density of 3.40 A cm-2 at 2.0 V in an AEMWE single cell. These results indicate that the self-crosslinking strategy can improve the overall performance of poly(aryl piperidinium) AEMs and provide a reference for membrane design in AEMWE applications.关键词
高分子材料/阴离子交换膜/自交联/聚芳基哌啶/电解水Key words
polymer materials/anion exchange membrane/self-crosslinking/poly(aryl piperidinium)/water electrolysis引用本文复制引用
孔令涵,袁伟.自交联聚芳基哌啶阴离子交换膜的制备及电解水性能[EB/OL].(2026-05-26)[2026-05-27].http://www.paper.edu.cn/releasepaper/content/202605-120.学科分类
高分子化合物工业/电化学工业
