Terminally-crosslinked sulfonated poly(fluorenyl ether sulfone) as a highly conductive and stable proton exchange membrane

Roshni Lilly Thankamony, Myung Gun Lee, Kyuwon Kim, Jong Dal Hong, Tae Hyun Kim, Hye Jin Lee, Hyoung Juhn Kim, Sukwoo Nam, Yong Beom Lim

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10 Citations (Scopus)

Abstract

Sulfonated poly(fluorenyl ether sulfone) (PFES) with a terminally- crosslinked network structure was prepared by heat-induced crosslinking of the allyl-terminated telechelic sulfone polymers using a bisazide. The crosslinked polymer membrane with a sulfofluorenyl moiety of 70% (PFES-70) showed excellent hydrolytic, dimensional, and mechanical stability. The crosslinked PFES-70 membrane revealed a proton conductivity of 0.04 S/cm at 20 °C, which increased significantly with increasing temperature. The conductivity of 0.38 S/cm at 100 °C for PFES-70 was higher than that of both non-crosslinked (0.33 S/cm) and Nafion® (0.17 S/cm). In addition, the crosslinked PFES-70 showed a methanol permeability of only 1.4% (3.9×10-8 cm 2/s) compared to Nafion®. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)992-1000
Number of pages9
JournalMacromolecular Research
Volume18
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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