Novel sulfonated polyether suffone (SPES)/AIOOH organic/inorganic composite membranes were prepared by doping SPES with AIOOH, which lowered the methanol crossover and increased the proton conductivity at high temperatures. The structure and performance of the obtained membranes were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) etc. Compared with the pure SPES membrane the composite membranes had higher thermal stability and water uptake. The morphology of the composite membranes indicated that AIOOH was uniformly distributed throughout the SPES matrix. The network-like structure began to form when the AIOOH content was around 10%. The proton conductivity was still ca 0.014 S·cm-1 even at a temperature as high as 120 ℃. Additionally, the methanol resistance improved greatly as the content of AIOOH increased. The SPES/AIOOH composite membrane is a promising candidate for direct methanol fuel cell (DMFC) applications.%为了提高膜的阻醇性能和高温下的质子传导性,在磺化聚醚砜(SPES)中掺杂一种吸湿性的无机物AIOOH,制备了一种新型的SPES/AIOOH复合质子交换膜.并经傅里叶变换红外(FTIR)光谱、热失重(TGA)、扫描电镜(SEM)等手段对膜的结构和性能进行了表征.结果表明:复合膜较纯SPES膜具有更高的热稳定性和吸水率:SEM图片显示AIOOH在膜中分布均匀.复合膜在高温下具有良好的质子传导性,掺杂量为10％(W)的复合膜在120℃下的质子传导率仍可保持在0.014 S·cm-1左右:随着AIOOH含量的增加,复合膜的阻醇性能大大提高,这表明该复合膜在直接甲醇燃料电池中具有良好的应用前景.
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