Abstract New high temperature proton exchange membranes are fabricated based on low cost polyvinylchloride (PVC) and 1-(3-aminopropyl)imidazole (APIm) by a facile method (i.e. solution casting method). Due to the presence of chemically active chloride sites in the backbone, PVC reacts with the amino and imidazole groups in APIm directly via the nucleophilic reaction. The fabricated membranes possess good thermal stability, high hydrophilicity and mechanical strength as well as superior phosphoric acid (PA) doping capability due to the acid-base and hydrogen bond interactions between the APIm groups and PA molecules. Incorporating pendant APIm groups into PVC endows membranes with significantly higher acid doping levels than membranes functionalized by mono- and bis-amino or imidazole containing compounds. As a result, the PVC-19%APIm/2.4PA membrane displays an outstanding proton conductivity of 0.26 S cm-1 at 180 °C under anhydrous conditions, which is comparable to the conductivity of Nafion-type membranes (> 0.1 S cm-1 at 80 °C). The polarization curve and durability test demonstrate the technical feasibility of the PVC-x%APIm/PA membrane for the high temperature proton exchange membrane fuel cell.

中文翻译：

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用于高温质子交换膜燃料电池应用的 1-（3-氨基丙基）咪唑功能化聚（氯乙烯）

摘要 以低成本聚氯乙烯（PVC）和1-（3-氨基丙基）咪唑（APIm）为原料，采用简便的方法（即溶液浇铸法）制备了新型高温质子交换膜。由于主链中存在化学活性氯化物位点，PVC 通过亲核反应直接与 APIm 中的氨基和咪唑基团反应。由于 APIm 基团和 PA 分子之间的酸碱和氢键相互作用，制备的膜具有良好的热稳定性、高亲水性和机械强度以及优异的磷酸 (PA) 掺杂能力。将 APIm 侧基结合到 PVC 中使膜的酸掺杂水平明显高于由单氨基和双氨基或含咪唑化合物官能化的膜。结果，PVC-19%APIm/2。4PA 膜在 180 °C 无水条件下显示出 0.26 S cm-1 的出色质子电导率，与 Nafion 型膜的电导率相当（80 °C 时 > 0.1 S cm-1）。极化曲线和耐久性测试证明了PVC-x%APIm/PA膜用于高温质子交换膜燃料电池的技术可行性。