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聚乙烯醇对磺化聚芳醚腈质子交换膜的改性

Modification of sulfonated poly(arylene ether nitrile) proton exchange membranes by poly(ethylene--vinyl alcohol).

作者信息

Liu Hao, Dong Tiandu, Zhou Mingzheng, Zhang Zetian, Li Yunxi, Lu Chuanrui, Liu Yichen, Zhao Shengqiu, Zheng Shuhong, Meng Zihan, Tang Haolin

机构信息

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China

State Power Investment Corporation Hydrogen Energy Company, Ltd. Co. Beijing China.

出版信息

RSC Adv. 2023 Apr 6;13(16):11062-11068. doi: 10.1039/d2ra08294b. eCollection 2023 Apr 3.

DOI:10.1039/d2ra08294b
PMID:37063245
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10091364/
Abstract

The modification of the physicochemical properties of sulfonated poly(arylene ether nitrile) (SPAEN) proton exchange membranes was demonstrated by poly(ethylene--vinyl alcohol) (EVOH) doping (named SPAEN-%). By controlling the temperature during membrane preparation, the side reactions of the sulfonic acid groups to form sulfonic acid esters were effectively prevented, greatly reducing the proton conductivity of the membranes. Due to the flexible chain of EVOH, SPAEN-8% showed a relatively high elongation of 30.2%, which enhanced the aromatic polymers' flexibility. The SPAEN-2% membrane exhibited proton conductivity of 166, 55, and 9.6 mS cm at 95%, 70%, and 50% relative humidity, respectively, higher than those of the other SPAEN-% membranes and even comparable to that of Nafion 212. The water uptake, morphological study, and through-plane proton conductivity of the membranes were studied and discussed. The results suggest that EVOH doping can be used as an effective strategy to improve SPAEN-based proton exchange membranes' performance.

摘要

通过聚（乙烯 - 乙烯醇）（EVOH）掺杂（命名为SPAEN-%）证明了磺化聚（亚芳基醚腈）（SPAEN）质子交换膜的物理化学性质的改性。通过在膜制备过程中控制温度，有效地防止了磺酸基团形成磺酸酯的副反应，大大降低了膜的质子传导率。由于EVOH的柔性链，SPAEN-8%表现出相对较高的30.2%的伸长率，增强了芳香族聚合物的柔韧性。SPAEN-2%膜在相对湿度为95%、70%和50%时的质子传导率分别为166、55和9.6 mS/cm，高于其他SPAEN-%膜，甚至与Nafion 212相当。研究并讨论了膜的吸水率、形态学研究和平面质子传导率。结果表明，EVOH掺杂可作为提高基于SPAEN的质子交换膜性能的有效策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/1f19466f845e/d2ra08294b-f6.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/67e96795d139/d2ra08294b-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/45948f534c09/d2ra08294b-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/1f19466f845e/d2ra08294b-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/f832ee35cfff/d2ra08294b-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/78ffe59a4b13/d2ra08294b-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/45948f534c09/d2ra08294b-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93e1/10091364/1f19466f845e/d2ra08294b-f6.jpg

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