膜科学与技术

哌啶功能化聚芳靛红膜制备及电解水性能

作者：杨雄，焉晓明，贺高红

单位：大连理工大学石油与化学工程学院，辽宁省盘锦市 124221

关键词：哌啶；无芳基醚；碱稳定性；阴离子交换膜水电解

出版年,卷(期):页码： 2020,40(5):23-30

摘要：

通过对三联苯和靛红的简单可控酸催化缩聚反应成功合成了一种无芳基醚键的聚芳靛红聚合物，而后与1-（6-溴己基）-1-甲基哌啶溴化铵进行季铵功能化反应，制备了哌啶功能化聚芳靛红阴离子交换膜用于碱性电解水制取氢气。膜在30 ℃时的离子传导率达到 33 mS/cm。在80 ℃、1 mol/L KOH溶液中浸泡774 h后膜的离子交换容量可以保持初始值的85%，并且化学结构没有发生明显变化，显示出良好的耐碱稳定性。基于该膜的电池在50 ℃、1 mol/L KOH、2.5 V时的电流密度达到312 mA/cm2，且在200 mA/cm2的电流密度下电池可以稳定运行约33 h。以上结果表明这种膜在碱性电解水领域具有良好的应用前景。

The aryl ether-free poly(aryl isatin) polymer was successfully synthesized via simple and controllable acid-catalyzed polycondensation reaction of p-Terphenyl and isatin, and then followed the quaternary ammonium functionalized reaction with 1-(6-bromohexyl)-1-methylpiperidinium ammonium bromide to prepare piperidinium functionalized poly（aryl isatin） anion exchange membranes for hydrogen production by alkaline water electrolysis. The membrane showed a ionic conductivity of 33 mS/cm at 30 ℃. The ion exchange capacity can remain 85% of the initial value after the membrane was immersed in 1 mol/L KOH solution at 80 ℃ for 774 h, moreover, no obvious changes in chemical structure happened, showing good alkaline stability. The cell based on this membrane presented a current density of 312 mA/cm2 at 2.5 V under 50 ℃ and 1 mol/L KOH and the cell can run stably for about 33 h at current density of 200 mA/cm2. The above results indicate that this membrane has a good application prospect in the field of alkaline water electrolysis.

杨雄（1994-），男，湖北省仙桃市人，硕士生，主要从事电解池碱性阴离子交换膜的制备与性能研究。

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