膜科学与技术

交联型聚芳醚基阴离子交换膜的制备及性能研究

作者：王秀琴，林陈晓，朱爱梅，张秋根，刘庆林

单位：厦门大学化学化工学院，厦门，361005

关键词：烯烃复分解；交联型；阴离子交换膜；燃料电池

出版年,卷(期):页码： 2018,38(2):1-8

摘要：

燃料电池由于能量转化率高、环境友好等优点，是最具应用前景的能量转化装置之一。阴离子交换膜作为燃料电池的核心部件，仍存在低电导、高溶胀等问题。这里，通过设计聚芳醚结构使其侧链末端含有碳碳双键，在Grubbs二代催化剂作用下进行烯烃复分解反应接枝离子基团，利用剩余不饱和双键在高温下的交联反应，制备出交联型聚芳醚基阴离子交换膜。由于亲水性侧链与疏水性主链的不兼容性，使膜内形成了有利于离子传输的微相分离结构，交联膜的最高电导率达到81.1 mS·cm-1(80 oC)。此外，交联结构能有效地抑制膜的溶胀，交联膜C-FPAE-PH-1.5在30 oC下的溶胀率仅为7.51%，表现出优异尺寸稳定性。C-FPAE-PH-1.5膜在60 oC下1 M KOH水溶液中浸泡360 h后，保留了93.1%的电导率，表现出优异的耐碱性能。

Fuel cells are regarded as one of the most perspective energy conversion devices due to its high efficiency and low pollution. As a critical component of fuel cells, anion exchange membranes (AEMs) still meet the dilemma of low conductivity and high swelling ratio. Herein, crosslinked poly(arylene ether)s-based anion exchange membranes (AEMs) were prepared via olefin metathesis using Grubbs II catalyst and crosslinking under thermal treatment. The as-prepared AEMs exhibit obvious microphase separated morphology since the hydrophilic side chain is immiscible with hydrophobic poly(arylene ether)s backbone. Finally, the crosslinked AEMs demonstrate a highest conductivity of 81.1 mS·cm-1 at 80 oC. The crosslinked structure is effective at enhancing the dimensional stability of the membranes. C-FPAE-PH-1.5 shows a low swelling ratio of 7.51% at 30 oC. Furthermore, the crosslinked AEMs show robust alkaline stability. C-FPAE-PH-1.5 remained 93.1% of its original conductivity after immersing into a 1 M aqueous KOH solution at 60 oC for 360 h.

作者简介：王秀琴(1993-)，女，浙江温州人，在读硕士研究生，主要从事功能膜材料的制备，E-mail：xiu-qin.wang@foxmail.com。通讯作者E-mail：qlliu@xmu.edu.cn。国家自然科学基金(21576226)资助。

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