膜
电导率
质子
兴奋剂
材料科学
质子输运
化学
化学工程
高分子化学
物理化学
光电子学
物理
生物化学
量子力学
工程类
作者
Hassan Namazi,Hossein Ahmadi
标识
DOI:10.1016/j.memsci.2011.08.065
摘要
Abstract Poly[2,2′-(m-pyrazolidene)-5,5′-bibenzimidazole] (PPBI) was synthesized via polycondensation reaction of pyrazole-3,5-dicarboxylic acid and 3,3′,4,4′-tetraaminobiphenyle (TAB) in polyphosphoric medium. Then the novel proton conducting polymer, butylsulfonated PPBI (BS-PPBI), was synthesized through the ring-opening reaction of 1,4-butanesultone by the reactive N–H groups of PPBI. The solubility of the BS-PPBI membranes in aprotic polar solvents was improved with increasing the sulfonation level. The water uptake and acid doping level of the BS-PPBI membranes showed an increase in high butylsulfonation level. The proton conductivity of the prepared membranes was measured in the temperature range of 30–145 °C in 100% relative humidity (RH) which increased with increasing the temperature and butylsulfonation level. The tensile strength and elongation at break of the membranes were increased and decreased, respectively by increasing of butylsulfonation level. The cell performance of membranes was showed a few improvements in comparison of pure PPBI.
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