A series of proton exchange membranes were prepared by incorporating phosphonic functionalized siloxane into sulfonic poly(2,6-dimethyl-1,4-phenyleneoxide) (SPPO) and imidazole functionalized poly(2,6-dimethyl-1,4-phenyleneoxide) grafted with siloxane (IPPO-Si). Phosphonic acid functionalized siloxane was synthesized from amino trimethyl phosphonic acid (ATMP) and (3-aminopropyl)triethoxysilane (APTES). FTIR results showed that 1-methylimidazole and APTES were successfully grafted onto polyphenylene oxide, and APTES successfully formed Si-O-Si crosslinked networks through hydrolytic crosslinking. The membranes were thermally stable up to 220 °C and exhibited excellent oxidative stability and mechanical performance. We also measured the proton conductivity of the membranes. The results showed that the proton conductivities of the composite membranes increased with the increasing of SPPO content at different degrees under high (100 °C–160 °C) and low (25 °C–80 °C) temperature conditions. Furthermore, the IPPO-SI-P/SPPO-30 has the best conductivity, reaching to 0.1131 S cm⁻¹ at 80 °C, 100%RH and 0.1049 S cm⁻¹ at 160 °C, 5%RH, respectively. Therefore, this novel membrane acts as a potential candidate for proton exchange membranes with a wider applicable temperature (25 °C–160 °C).

通过将膦官能化的硅氧烷掺入接枝的磺酸聚（2,6-二甲基-1,4-苯氧基）（SPPO）和咪唑官能化的聚（2,6-二甲基-1,4-苯氧基）中来制备一系列质子交换膜与硅氧烷（IPPO-Si）。由氨基三甲基膦酸（ATMP）和（3-氨基丙基）三乙氧基硅烷（APTES）合成膦酸官能化的硅氧烷。FTIR结果表明1-甲基咪唑和APTES成功接枝到聚苯醚上，APTES通过水解交联成功形成Si-O-Si交联网络。该膜在高达220°C的温度下具有热稳定性，并具有出色的氧化稳定性和机械性能。我们还测量了膜的质子传导率。结果表明，在高温（100°C–160°C）和低温（25°C–80°C）下，复合膜的质子电导率随SPPO含量的增加而增加。此外，IPPO-SI-P / SPPO-30具有最佳的导电性，达到0.1131 S cm^分别在80°C -1、100％RH和0.1049 S cm ^-1下在160°C，5％RH。因此，这种新型膜可作为质子交换膜的潜在候选者，适用温度范围更广（25°C–160°C）。