芳烯
膜
热稳定性
乙醚
高分子化学
离子交换
材料科学
咪唑
酮
电导率
氢氧化物
化学稳定性
阳离子聚合
化学
离子
有机化学
烷基
芳基
物理化学
生物化学
作者
Cao Manh Tuan,Vo Dinh Cong Tinh,Dukjoon Kim
出处
期刊:Membranes
[MDPI AG]
日期:2020-06-30
卷期号:10 (7): 138-138
被引量:14
标识
DOI:10.3390/membranes10070138
摘要
A novel anion exchange membrane was synthesized via crosslinking of the quaternized polyepichlorohydrin (QPECH) by 1-(3-aminopropyl) imidazole grafted poly(arylene ether ketone) (PAEK-API). While the QPECH provided an excellent ion conductive property, the rigid rod-structured PAEK-API played a reinforcing role, along with providing the high conductivity associated with the pendant API group. The chemical structure of QPECH/PAEK-API membranes was identified by 1H nuclear magnetic resonace spectroscopy. A variety of membrane properties, such as anion conductivity, water uptake, length swelling percentage, and thermal, mechanical and chemical stability, were investigated. The QPECH/PAEK-API1 membrane showed quite high hydroxide ion conductivity, from 0.022 S cm−1 (30 °C) to 0.033 S cm−1 (80 °C), and excellent mechanical strength, associated with the low water uptake of less than 40%, even at 80 °C. Such high conductivity at relatively low water uptake is attributed to the concentrated cationic groups, in a cross-linked structure, facilitating feasible ion transport. Further, the QPECH/PAEK-API membranes showed thermal stability up to 250 °C, and chemical stability for 30 days in a 4 NaOH solution, without significant loss of ion exchange capacity.
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