Preparation and characterization of sulfonated poly(tetra phenyl ether ketone sulfone)s for proton exchange membrane fuel cell

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• 作者：Dong Wan Seo^a ; Young Don Lim^a ; Soon Ho Lee^a ; In Seok Jeong^a ; Dong Il Kim^b ; Ju Ho Lee^b ; Whan Gi Kim^a ; ^{wgkim@kku.ac.kr}
• 关键词：Poly(ether ketone sulfone) ; PEMFC ; Multi-phenyl monomer ; Proton exchange membrane ; Proton conductivity
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：7
• 页码：6140-6147
• 文件大小：766 K

摘要

Sulfonated poly(tetra phenyl ether ketone sulfone)s SPTPEKS were successfully synthesized for proton exchange membrane. Poly(tetra phenyl ether ketone sulfone)s PTPEKS were prepared by the 4,4鈥?dihydroxydiphenylsulfone with 1,2-bis(4-fluorobenzoyl)-3,4,5,6-tetraphenylbenzene (BFBTPB) and 4,4鈥?difluorodiphenylsulfone, respectively, at 210聽掳C using potassium carbonate in sulfolane. PTPEKS were followed by sulfonation using chlorosulfonic acid and concentrated sulfuric acid at two stage reactions. Different contents of sulfonated unit of SPTPEKS (17, 20, 23聽mol%of BFBTPB) were studied by FT-IR, ¹H NMR spectroscopy, and thermo gravimetric analysis (TGA). Sorption experiments were conducted to observe the interaction of sulfonated polymers with water. The ion exchange capacity (IEC) and proton conductivity of SPTPEKS were evaluated with increase of degree of sulfonation. The water uptake of synthesized SPTPEKS membranes exhibit 25-61%compared with 28%of Nafion 211^庐. The SPTPEKS membranes exhibit proton conductivities (25聽掳C) of 11.7-25.3聽脳聽10^鈭?聽S/cm compared with 33.7聽脳聽10^鈭?聽S/cm of Nafion 211^庐.