|Pendant-group cross-linked highly sulfonated co-polyimides for proton exchange membranes|
|H. Y.; Zhang Yao, Y. H.; Liu, Y.; You, K. Y.; Song, N. N.; Liu, B. J.; Guan, S. W.
|Source Publication||Journal of Membrane Science
|Abstract||A series of pendant-group cross-linkable sulfonatecl co-polyimides (SPIs) with high degree of sulfonation were synthesized via a one-pot poly-condensation reaction from 1,3-bis(2-trifluoromethyl-4-aminophenoxy)-5-(2,3,5,6-tetrafluoro-4-vinylphenoxy)benzene (6FTFPB), 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB), 4,4'-diamindodiphenyl ether-2,2'-disulfonic acid (ODADS) and 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTDA). Tough and flexible membranes were obtained from the SPIs by a solvent casting method. The cross-linking reaction of the pendant tetrafluorostyrol groups in the SPIs was performed at 260 degrees C. During the thermal treatment, no loss of the sulfonic acid groups was observed. The performance of the membranes was significantly enhanced after curing reaction. For instance, the proton conductivity, water uptake, swelling ratio and methanol permeability of the Cured-SPI-20 at room temperature were 85 mS cm(-1), 33.3%, 8.9% and 4.93 x 10(-7) CM2 s(-1), respectively. Moreover, the cross-linked membranes also exhibited improved chemical resistance, oxidative stability and mechanical property. This investigation demonstrates that the pendant cross-linked polyimide membranes with high degree of sulfonation may be promising for proton exchange membrane fuel cell technology. (C) 2014 Elsevier BM. All rights reserved.|
; zhang, yunhe
; you, kaiyuan
; song, ningning
; liu, baijun
; guan, shaowei] jilin univ, alan g macdiurmid inst, changchun 130012, peoples r china. [liu, yu] chinese acad sci, inst met res, shenyang 110016, peoples r china.
; guan, sw (reprint author), jilin univ, alan g macdiurmid inst, qianjin st 2699, changchun 130012, peoples r china.
Polymer Electrolyte Membranes
H. Y.,Zhang Yao, Y. H.,Liu, Y.,et al. Pendant-group cross-linked highly sulfonated co-polyimides for proton exchange membranes[J]. Journal of Membrane Science,2015,480:83-92.
H. Y..,Zhang Yao, Y. H..,Liu, Y..,You, K. Y..,Song, N. N..,...&Guan, S. W..(2015).Pendant-group cross-linked highly sulfonated co-polyimides for proton exchange membranes.Journal of Membrane Science,480,83-92.
H. Y.,et al."Pendant-group cross-linked highly sulfonated co-polyimides for proton exchange membranes".Journal of Membrane Science 480(2015):83-92.
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