화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.18, No.10, 992-1000, October, 2010
DOI10.1007/s13233-010-1016-9  Export Citation
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 Lee1, Hyoung-Juhn Kim1, SukWoo Nam1, and Yong-beom Lim2
  • Department of Chemistry, University of Incheon, Incheon, 406-840, Korea
  • 1Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Korea
  • 2Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea
E-mail:
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 A degrees C, which increased significantly with increasing temperature. The conductivity of 0.38 S/cm at 100 A degrees C for PFES-70 was higher than that of both non-crosslinked (0.33 S/cm) and NafionA (R) (0.17 S/cm). In addition, the crosslinked PFES-70 showed a methanol permeability of only 1.4% (3.9x10(-8) cm(2)/s) compared to NafionA (R).
Keywords:polymer electrolyte membrane;sulfonated poly(fluorenyl ether sulfone);terminal crosslinking;proton conductivity;dimensional stability
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