物理化学学报 >> 2013, Vol. 29 >> Issue (12): 2573-2578.doi: 10.3866/PKU.WHXB201310214

电化学和新能源 上一篇    下一篇

基于自交联杂萘联苯聚芳醚阴离子交换膜制备及其物理化学性质

刘德治, 候西鑫, 朱秀玲, 王瑞, 井健, 崔悦   

  1. 大连理工大学化工与环境生命学部化工学院, 辽宁大连 116024
  • 收稿日期:2013-08-22 修回日期:2013-10-14 发布日期:2013-11-28
  • 通讯作者: 朱秀玲 E-mail:zhuxl@dlut.edu.cn

Preparation and Physicochemical Property of Self-Crosslinked Poly(phthalazinone ether ketone) Anion-Exchange Membranes

LIU De-Zhi, HOU Xi-Xin, ZHU Xiu-Ling, WANG Rui, JING Jian, CUI Yue   

  1. School of Chemical Engineering, Faculty of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2013-08-22 Revised:2013-10-14 Published:2013-11-28
  • Contact: ZHU Xiu-Ling E-mail:zhuxl@dlut.edu.cn

摘要:

以氯甲基杂环聚醚酮(CMPPEK)为原料, 加入三乙胺进行铵化, 并分别加入二乙烯三胺(DETA)和二乙胺(DEA), 生成的仲胺基(或叔胺基)与邻近分子链氯甲基团进行自交联. 经过制膜和离子交换反应, 制备了DETA自交联杂萘联苯聚芳醚阴离子交换膜(DETA-QPPEK-OH)和DEA 自交联杂萘联苯聚芳醚阴离子交换膜(DEA-QPPEK-OH). 采用傅里叶变换红外(FTIR)光谱对制备自交联膜的化学结构进行表征. 研究了DETA-QPPEK-OH和DEA-QPPEK-OH膜的理化性质, 结果表明前者具有较低吸水率和更低溶胀度. 通过研究DETAQPPEK-OH和DEA-QPPEK-OH膜的离子传导率随温度的变化规律, 结果表明在80 ℃时其离子传导率分别达到0.060 和0.028 S·cm-1, 表明本文制备的自交联膜具有较高离子传导率. 此外还通过热重分析(TGA)对两类自交联膜的热稳定性进行了研究.

关键词: 聚合物阴离子交换膜, 碱性燃料电池, 杂环聚醚酮, 二乙烯三胺, 自交联, 电导率

Abstract:

Self-crosslinked poly(phthalazinone ether ketone) anion-exchange membranes (AEMs) were successfully fabricated from chloromethylated poly(phthalazinone ether ketone) (CMPPEK) by amination, membrane casting, and OH-exchange reaction steps. Triethylamine (TEA) was used as an ammonium agent, and diethylenetriamine (DETA) and diethylamine (DEA) were used as self-crosslinking agents in the quaternary reaction of CMPPEK, resulting in DETA-QPPEK-OH and DEA-QPPEK-OH AEMs, respectively. The chemical structures of DETA-QPPEK-OH and DEA-QPPEK-OH were characterized using Fourier transform infrared (FTIR) spectroscopy. The physicochemical properties of these AEMs were investigated including ion-exchange capacity (IEC), swelling ratios, water uptake, and ionic conductivities at 30 ℃. The results showed that the swelling ratio of the DETA-crosslinked AEM was lower than that of the DEAcrosslinked AEM. This could be attributed to multi-crosslinking of multi-amino groups in the DETA structure. The temperature dependences of the ionic conductivities of the AEMs were measured from 30 to 80 ℃. The ionic conductivities of the DEA-crosslinked and DETA-crosslinked AEMs were 0.060 and 0.028 S·cm-1 at 80 ℃, respectively. The thermal stabilities of the resulting DETA-QPPEK-OH and DEAQPPEK-OH membranes were investigated using thermogravimetric analysis (TGA), under a nitrogen atmosphere. The obtained membranes have high dimensional stabilities and are very promising for potential applications in anion-exchange membrane fuel cells (AEMFCs).

Key words: Anion exchange membrane, Alkaline fuel cell, Poly(phthalazinone ether ketone), Diethylenetriamine, Self-crosslinking, Conductivity

MSC2000: 

  • O646