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Nanostructured Proton‐Conducting Membranes for Fuel Cell Applications
Author(s) -
Tan Ai Ren,
Magno de Carvalho Luisa,
de Souza Gomes Ailton
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551120
Subject(s) - arylene , phosphotungstic acid , membrane , benzimidazole , ether , proton exchange membrane fuel cell , conductivity , fourier transform infrared spectroscopy , materials science , polymer chemistry , chemical engineering , proton , sulfonate , composite number , polymer , chemistry , organic chemistry , composite material , physics , biochemistry , alkyl , sodium , quantum mechanics , aryl , metallurgy , engineering , catalysis
Summary: Composite polymer membranes based on sulfonated poly(arylene ether sulfone) (SPSU) containing benzimidazole derivatives (BIzD) and heteropolyacid for use in fuel cells were prepared. The effects of both the increment in BBIzD component and the procedure of mixing on the morphology and proton conductivity were investigated. The heteropolyacid (HPA) extracted in water decreased with the addition of BBIzD in the composite. The interactions developed among the sulfonate groups, the benzimidazole derivatives and the HPA were verified by Fourier transform infrared (FTIR). The network of interactions established in the composite membrane based on SPSU containing benzimidazole derivatives and phosphotungstic acid (HPW) in the ratio of SPSU/BBIzC 4 (8:1) in equivalents and SPSU/HPW(7:3) in mass resulted in a very high proton conductivity at 110 °C.