摘要
制备了基于磷酸掺杂聚酰亚胺(PI)的非水质子导电材料,研究了其质子导电性能和导电机理,发现常温下PI与磷酸之间的作用以氢键为主.常温电导率不高,随着温度的升高,链段运动的加快也能促进质子的输送,两种结构PI的电导率对温度的依赖性更接近VTF方程或WLF方程.与磷酸复合后膜的热稳定性和氧化稳定性略有下降,但膜的综合性能仍有一定的实用性.
Anhydrous proton conducting materials based on phosphoric acid doped polyimide （PI） were prepared. Proton conductivity and mechanism of acid doped PI was studied. It was found that VTF or WLF equation was more suitable to fit the temperature dependence of DC conductivity of H3PO4 doped PI rather than Arrhenius equation. Hydrogen bond played an important role in the interaction between PI and phosphoric acid at room temperature. Proton transport was enhanced with increasing temperature due to the improvement of segmental motion. The thermal stability, oxidation stability, and methanol barrier ability decreased a little with the addition of phosphoric acid.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第2期229-233,共5页
Journal of Tongji University:Natural Science
基金
教育部留学回国人员科研启动基金资助项目
国家自然科学基金资助项目(50103009)
上海市自然科学基金资助项目(05ZR14126)
关键词
质子导电材料
聚酰亚胺
磷酸
质子导电
甲醇渗透
proton conducting materials
polyimide
phosphoric acid
proton conductivity
methanol permeability
