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Fundamental studies of a new series of anion exchange membranes: Membranes prepared from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) and 4-vinylpyridine

Authors

  • Yuan Li,

    1. Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People' Republic of China
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  • Tongwen Xu

    Corresponding author
    1. Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People' Republic of China
    • Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People' Republic of China
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Abstract

A series of anion exchange membranes with pyridinium groups were prepared by aminating 100% bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) with 4-vinylpyridine. These membranes exhibited higher ion exchange capacity, lower water uptake, lower area resistance, and better thermal stabilities than the membranes prepared from pyridine. Trimethylamine was used for further amination, but it did not enhance the membrane's permselectivity for fluoride, chloride, bromide, iodide, hydroxyl, nitrate, nitrite, or thiocyanate anions. Accordingly, 4-vinylpyridine was the better aminating agent to enhance the permselectivity of membranes for some monovalent anions. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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