Terminally-Crosslinked Sulfonated Poly(fluorenyl ether sulfone) as a Highly Conductive and Stable Proton Exchange Membrane

Title
Terminally-Crosslinked Sulfonated Poly(fluorenyl ether sulfone) as a Highly Conductive and Stable Proton Exchange Membrane
Authors
Roshni Lilly ThankamMyung-Gun LeeKyuwon KimJong-Dal Hong김태현이혜진김형준남석우Yong-beom Lim
Keywords
polymer electrolyte membrane; sulfonated poly(fluorenyl ether sulfone); terminal crosslinking; proton conductivity; dimensional stability
Issue Date
2010-10
Publisher
Macromolecular research
Citation
VOL 18, NO 10, 992-1000
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℃, which increased significantly with increasing temperature. The conductivity of 0.38 S/cm at 100℃ for PFES-70 was higher than that of both non-crosslinked (0.33 S/cm) and Nafion(R) (0.17 S/cm). In addition, the crosslinked PFES-70 showed a methanol permeability of only 1.4% (3.9×10^8 cm2 /s) compared to Nafion(R).
URI
http://pubs.kist.re.kr/handle/201004/38395
ISSN
1598-5032
Appears in Collections:
KIST Publication > Article
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