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Xu Y, Ye N, Zhang D, et al. Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes. J Colloid Interface Sci. 2017;497:333-342doi: 10.1016/j.jcis.2017.03.033.
Xu, Y., Ye, N., Zhang, D., Yang, J., & He, R. (2017). Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes. Journal of colloid and interface science, 497333-342. https://doi.org/10.1016/j.jcis.2017.03.033
Xu, Yixin, et al. "Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes." Journal of colloid and interface science vol. 497 (2017): 333-342. doi: https://doi.org/10.1016/j.jcis.2017.03.033
Xu Y, Ye N, Zhang D, Yang J, He R. Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes. J Colloid Interface Sci. 2017 Jul 01;497:333-342. doi: 10.1016/j.jcis.2017.03.033. Epub 2017 Mar 06. PMID: 28301829.
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J Colloid Interface Sci. 2017 Jul 01;497:333-342. doi: 10.1016/j.jcis.2017.03.033. Epub 2017 Mar 06.

Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes.

Journal of colloid and interface science

Yixin Xu, Niya Ye, Dengji Zhang, Jingshuai Yang, Ronghuan He

Affiliations

  1. Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
  2. Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China. Electronic address: [email protected].

PMID: 28301829 DOI: 10.1016/j.jcis.2017.03.033

Abstract

Two N3-substituted imidazoles 1,2-dimethylimidazole and 1-butyl-2-methylimidazole were chosen to functionalize poly(aryl ether ketone), respectively. The generated imidazolium cations could electrostatically react with sulfonate ions of the sulfonated poly(ether ether ketone) forming the ionic crosslinking structure of the membranes. The changes in crosslinking degree and the alkyl chain-length on N3 site of the imidazoliums could highly affect the properties of the anion exchange membranes (AEMs). The AEMs functionalized by 1-butyl-2-methylimidazole exhibited superior properties compared to those functionalized by 1,2-dimethylimidazole according to the tolerance tests of the AEMs towards hot alkaline solutions. After exposed to 1M KOH at 80°C for 200h, the 1-butyl-2-methylimidazole modified AEMs maintained the ion exchange capacity of above 85%, the conductivity of about 70%, and the tensile stress at break of around 80%, respectively. The hydrophile-lipophile balance of the polymer membranes was calculated and proposed to better understand the correlation between structures and properties of the AEMs. The degradation of the imidazolium functional groups of the AEMs under the attack of hydroxide ions was evidenced by FT-IR analysis.

Copyright © 2017 Elsevier Inc. All rights reserved.

Keywords: Anion exchange membrane; Imidazolium; Ionic crosslinking; Stability; Tensile stress

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