Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
633578 | Journal of Membrane Science | 2014 | 7 Pages |
Abstract
A series of side-chain-type sulfonated poly(ether ketone/ether benzimidazole)s containing side-chain sulfonate groups and main-chain benzimidazole rings were successfully synthesized via benzimidazolization and acylation in a one-pot method. By varying the amount of sulfonate monomers, the ratio of sulfonate acid unit to benzimidazole base unit was easily controlled. 1H NMR and IR spectra were used to characterize the polymer structure. The resulting membranes exhibited excellent mechanical properties (11-45 MPa tensile stress and 9-23% elongation at break) and good thermal stability. The proton conductivity of SPEKEBI-4 was136 mS cmâ1 at 30 °C, much higher than Nafion® 115 membrane; while the methanol permeabilities of all the membranes were lower than Nafion® 115 membrane. Moreover, the passive direct methanol fuel cells (DMFCs) with SPEKEBI-2 membrane exhibited a maximum power density of 39.3 mW cmâ2 at 25 °C, which show great potential for application in polymer electrolyte membrane fuel cells.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Mengbing Cui, Zhenghui Zhang, Ting Yuan, Hui Yang, Liang Wu, Erigene Bakangura, Tongwen Xu,