Issue 16, 2016

Poly(tetrafluoroethylene-co-perfluorovinyl ether sulfonamide) for anion exchange membranes

Abstract

A soluble perfluorinated polymer poly(tetrafluoroethylene-co-perfluorovinyl ether sulfonamide) (PFSO2NH2) was successfully synthesized and used for preparation of perfluorinated anion exchange membranes (AEMs). PFSO2NH2 is soluble in many solvents and has excellent alkaline stability. The perfluorinated AEM (PFSO2NH–MGMC–OH) which was synthesized by the reaction of PFSO2NH2 with 4-methyl-4-glycidylmorpholin-4-ium chloride (MGMC) exhibits a hydroxide conductivity of 60.4 mS cm−1 at 80 °C and 13.8 mS cm−1 at 30 °C, respectively. The transport numbers of the membrane are 0.91 for Cl and 0.06 for Na+. The membrane shows good alkaline stability that it maintained 80.1% hydroxide conductivity and 85.6% ion exchange capacity (IEC) values after immersion in 8 M KOH over 30 days at 60 °C. This soluble PFSO2NH2 with high thermal and alkaline stability could be used as a precursor for other perfluorinated functional polymers and membranes.

Graphical abstract: Poly(tetrafluoroethylene-co-perfluorovinyl ether sulfonamide) for anion exchange membranes

Supplementary files

Article information

Article type
Paper
Submitted
08 Jan 2016
Accepted
29 Mar 2016
First published
30 Mar 2016

Polym. Chem., 2016,7, 2904-2912

Author version available

Poly(tetrafluoroethylene-co-perfluorovinyl ether sulfonamide) for anion exchange membranes

X. Liu, H. Gao, X. Chen, Y. Hu, H. Li and Y. Zhang, Polym. Chem., 2016, 7, 2904 DOI: 10.1039/C6PY00036C

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