Phosphoric acid doped sulfonated poly(tetra phenyl isoquinoline ether sulfone) copolymers for high temperature proton exchange membrane potential application

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• 作者：Dong Wan Seo ; Young Don Lim ; Mohammad Awlad Hossain ; Soon Ho Lee ; Hyun Chul Lee ; Ho Hyoun Jang ; Md. Monirul Islam ; Whan Gi Kim ; ^{wgkim@kku.ac.kr}
• 关键词：Fuel cells ; Proton exchange membrane ; Phosphoric acid ; Doping ; Proton conductivity ; Polymer electrolyte membrane
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：11 January, 2013
• 年：2013
• 卷：38
• 期：1
• 页码：667-674
• 全文大小：752 K

文摘

Phosphoric acid-doped sulfonated poly(tetra phenyl isoquinoline ether sulfone)s (PA-SPTPIESs) were successfully synthesized for high temperature proton exchange membrane. Poly(tetra phenyl ether ketone sulfone)s (PTPEKS) were prepared from 1,2-bis(4-fluorobenzoyl)-3,4,5,6-tetraphenyl benzene (BFBTPB) and bis(4-fluorohenyl) sulfone with bis(4-hydroxyphenyl) sulfone. The synthesis of the poly(tetra phenyl isoquinoline ether sulfone)s (PTPIESs), was carried out via an intramolecular ring-closure reaction of dibenzoylbenzene of PTPEKS with benzylamine. The sulfonated poly(tetra phenyl isoquinoline ether sulfone)s (SPTPIESs) were obtained by following sulfonation with concentrated sulfuric acid and doped by phosphoric acid. Different contents of sulfonated unit on PTPIESs (8, 12, 16?mol % of BFBTPB) and PA-SPTPIESs were studied by FT-IR, ¹H NMR spectroscopy, and thermogravimetric analysis (TGA). Strong acid-base interaction effect between poly benzisoquinoline (PBI) and sulfonic acid groups formed ionic crosslinking network between polymer chains. The ion exchange capacity (IEC) and proton conductivity of PA-SPTPIESs were evaluated with degree of sulfonation and doping of phosphoric acid.