A series of composite membranes based on sulfonated poly(arylene ether nitriles) (SPEN) with embedded tungstophosphoric acid (TPA) were prepared. The effect of TPA concentration on morphology, structure, thermal stability, mechanical strength, ion-exchange capacity and proton conductivity of SPEN-TPA composite membranes was studied in detailed. SEM images indicated the TPA were uniformly distributed throughout the SPEN membranes matrix, which is due to the hydrogen bonding networks and the electrostatic interactions in the composites. The existence of hydrogen bonds was also confirmed by FTIR. Benefiting from these, the composite membranes showed higher IEC, mechanical strength, and higher water uptake compared to pristine SPEN. The proton conductivity of the SPEN-TPA composite membranes were dominated by the TPA concentration. The proton conductivity of SPEN-50TPA achieved the highest value of 0.107 S/cm at 80 °C, which is 4.4 times as high as that of pristine SPEN. Moreover, it also showed excellent long-term stability, as the TPA did not show any leakage after 120 h at 80 °C. Furthermore, activation energy of proton conductivity imply coexistence of Grotthuss and vehicle mechanisms in the composite membranes. These results indicate that SPEN-TPA composite membrane have great potential as proton exchange membrane with high performance.

制备了一系列基于磺化聚亚芳基醚腈（SPEN）和嵌埋钨磷酸（TPA）的复合膜。详细研究了TPA浓度对SPEN-TPA复合膜的形貌，结构，热稳定性，机械强度，离子交换容量和质子传导率的影响。SEM图像表明，TPA在整个SPEN膜基质中均匀分布，这是由于氢键合网络和复合材料中的静电相互作用所致。FTIR也证实了氢键的存在。受益于这些，与原始SPEN相比，复合膜显示出更高的IEC，机械强度和更高的吸水率。SPEN-TPA复合膜的质子电导率受TPA浓度支配。SPEN-50TPA的质子传导率在80°C时达到最高值0.107 S / cm，是原始SPEN的4.4倍。此外，它还表现出出色的长期稳定性，因为TPA在80°C下放置120 h后未显示任何泄漏。此外，质子传导性的活化能暗示了格罗索斯和载体机制在复合膜中共存。这些结果表明SPEN-TPA复合膜具有作为高性能质子交换膜的巨大潜力。质子传导性的活化能暗示格罗索斯和载体机制在复合膜中共存。这些结果表明SPEN-TPA复合膜具有作为高性能质子交换膜的巨大潜力。质子传导性的活化能暗示格罗索斯和载体机制在复合膜中共存。这些结果表明SPEN-TPA复合膜具有作为高性能质子交换膜的巨大潜力。