Synthesis of proton conductive polymers with high electrochemical selectivity

Kui Xu, Kun Li, Christopher S. Ewing, Michael Anthony Hickner, Qing Wang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Electrochemical selectivity achieved in the cross-linked polymer membrane based on chain-end-functionalized fluoropolymers containing perfluorosulfonic acid side chains was reported. The copolymer of vinylidene fluoride (VDF) and perfluoro(4-methyl-3,6-dioxane-7-ene) sulfonyl fluoride (PFSVE) was prepared through a radical polymerization using 4-tert-butoxycarbonylaminobenzoyl peroxide as the initiator. The removal of the protecting tert-butoxycarbonyl groups in the copolymer using iodotrimethylsilane yielded the copolymer terminated with amino groups. The Hydrolysis of the sulfonyl fluoride groups to the ammonium salt was achieved in triethylamine methanol or water solution, and the sulfonic acid form of the polymer was obtained by ion-exchange with HCI aqueous solution. The cross-linked membrane exhibited methanol permeability of 1.89 × 10-9cm2/s, which was over 2 orders of magnitude lower than Nafion 117 with a methanol permeability of 1.92 × 10-6 cm2/s.

Original languageEnglish (US)
Pages (from-to)1692-1694
Number of pages3
JournalMacromolecules
Volume43
Issue number4
DOIs
StatePublished - Feb 23 2010

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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