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Poly(aryl ether nitrile)s containing flexible side-chain-type quaternary phosphonium cations as anion exchange membranes

含柔性侧链季鏻阳离子结构的聚芳醚腈阴离子交换膜

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Abstract

In order to effectively improve the properties of anion exchange membrane (AEM) materials, a series of novel poly(aryl ether nitrile)s with flexible side-chain-type quaternary phosphonium cations (PAEN-TPP-x) were designed and prepared on the basis of considering the influences of polymer backbone, cationic group species and the connection way between the cations and polymer chains. The synthetic method, structure and ion-exchange capacity, water absorption, swelling, hydroxide conductivity and alkaline stability of the obtained AEMs were studied. A comparative study with other reported AEMs was also performed for further exploration of the relationship between the structure and properties. These AEMs with flexible side-chain-type quaternary phosphonium cations displayed good comprehensive properties. Their water uptakes and swelling ratios were in the range of 11.6%–22.7% and 4.4%–7.8% at 60°C, respectively. They had hydroxide conductivity in the range of 28.6–45.8 mS cm−1 at 60°C. Moreover, these AEMs also exhibited improved alkaline stability, and the hydroxide conductivity for PAEN-TPP-0.35 could remain 82.1% and 80.6% of its initial value at 60 and 90°C in 2 mol L−1 NaOH solution for 480 h, respectively.

摘要

为有效改善聚合物阴离子交换膜材料(AEMs)的性能, 本研究在综合考虑聚合物结构、离子官能团种类及其链接方式对AEMs影响的基础上, 设计制备了一系列含有柔性侧链型季鏻阳离子结构的新型聚芳醚腈(PAEN-TPP-x)阴离子交换膜. 分别对所制聚芳醚腈阴离子交换膜的合成方法、结构和离子交换容量、吸水率、溶胀率、氢氧化物电导率及碱稳定性进行了系统研究, 并与一些其他已报道的AEMs进行了比较研究, 以进一步探索其结构与性能之间的关系. 研究发现所制备的含有柔性侧链型季鏻阳离子结构的聚芳醚腈阴离子交换膜具有良好的综合性能 在60°C下, 它们的吸水率、溶胀率和离子传导率分别为11.6%–22.7%, 4.4%–7.8%和28.6–45.8 mS cm−1. 与此同时, 该类AEMs还表现出良好的碱性稳定性, 其中代表性样品PAEN-TPP-0.35在2 mol L−1 NaOH溶液中、60和90°C下浸泡480 h后的OH−传导率分别保持在其初始值的82.1%和80.6%.本研究可为高性能聚合物阴离子交换膜材料的设计制备和改性提供新的思路和方法.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21404016), the Key Research Program of Jiangsu Province (BE2017645), the Six Talent Peaks Project of Jiangsu Province (XCL-078), and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions of China.

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Authors and Affiliations

  1. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, 213164, China

    Chenyi Wang  (汪称意), Zhengwang Tao  (陶正旺), Xiaoyan Zhao  (赵晓燕), Jian Li  (李坚) & Qiang Ren  (任强)

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  1. Chenyi Wang  (汪称意)
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  2. Zhengwang Tao  (陶正旺)
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  3. Xiaoyan Zhao  (赵晓燕)
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  4. Jian Li  (李坚)
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  5. Qiang Ren  (任强)
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Contributions

Wang C designed the experiments, Tao Z performed the experiments, Wang C and Tao Z analyzed the data and wrote the paper. All authors contributed to the general discussion.

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Correspondence to Chenyi Wang  (汪称意).

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The authors declare that they have no conflict of interest.

Chenyi Wang is an associate professor at the School of Materials Science and Engineering, Changzhou University. He obtained his PhD from Donghua University in 2010. After that, he went to Hanyang University (The Republic of Korea, 2010–2012) as a postdoctoral fellow. His research involves the development of high-performance polymeric materials for fuel cells, flow batteries, and microelectronics devices.

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Wang, C., Tao, Z., Zhao, X. et al. Poly(aryl ether nitrile)s containing flexible side-chain-type quaternary phosphonium cations as anion exchange membranes. Sci. China Mater. 63, 533–543 (2020). https://doi.org/10.1007/s40843-019-1222-x

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