聚苯并咪唑基/八氨基笼状倍半硅氧烷复合电解质膜的制备与性能  

Preparation and Characterization of Poly(2,5-benzimidazole)/Octa Ammonium Polyhedral Oligomeric Silsesquioxane Electrolyte Composite Membranes

作　　者：孙权[1] 倪娜[1] 俞李帅 张肖肖[1] 刘清亭[1,2] 张荣[1,2] 胡圣飞[1,2] 赵锋 李骁 

机构地区：[1]湖北工业大学材料科学与工程学院,湖北武汉430068 [2]绿色轻工材料湖北省重点实验室,湖北武汉430068 [3]武汉众宇动力系统科技有限公司,湖北武汉430056

出　　处：《高分子材料科学与工程》2016年第12期20-25,共6页Polymer Materials Science & Engineering

基　　金：湖北省科技支撑计划项目;2014年度留学人员科技活动项目

摘　　要：采用原位合成的方法制备了聚2，5-苯并咪唑（ABPBI）/八氨基笼状倍半硅氧烷（AM-POSS）复合膜材料，并对其化学结构、表面形貌、热稳定性、力学性能、磷酸吸收性能及质子传导性能进行了表征和测试。结果分析认为，与纯ABPBI膜比较．ABPBI／AM—POSs复合膜基体因独特的“八爪鱼”结构而提高了复合膜的热稳定性能和力学强度；AM—POSS粒子的添加还显著提高复合膜的磷酸吸收能力，进而提高了复合膜的质子传导率；ABPBI／3％AM—POSS复合膜在磷酸掺杂水平达到252％时在80～140℃较宽温度范围内质子传导率超过0．1S／cm；表明AM—POSS改性的ABPBI复合膜具备应用于宽温域质子交换膜燃料电池前景。Poly（2,5-benzimidazole） （ABPBI）/octa ammonium polyhedral oligomeric silsesquioxane （AM-POSS） composite membranes were prepared by in-situ synthesis. Their chemical structures, surface morphologies, thermal stabilities, mechanical properties, phosphoric acid absorptivities and proton conductivities were characterized and tested. Compared with the ABPBI, the composites with novel octopus shaped structures gain excellent mechanical properties and better thermal stabilities. Due to the addition of AM-POSS particles, composite membranes significantly increases their absorption and retention capacities of water and phosphoric acid, thus achieved greatly improvement of proton conductivities, the highest proton conductivities above 0.01 S/cm at a very wide temperature ranges of 80- 140 ℃ from 252% of phosphoric acid doped composite membranes indicate that it might be suitable for wide temperature proton exchange membrane fuel celI（PEMFC） applications.

关 键 词：聚2 5-苯并咪唑 八氨基笼状倍半硅氧烷 原位合成 力学性能 导电率 

分 类 号：TB383[一般工业技术—材料科学与工程]