通过共混的方法制备了磺化聚芳醚酮砜(SPAEKS)与聚偏氟乙烯(PVDF)复合型质子交换膜.红外光谱(FT-IR)表明复合膜中存在C-F和O=S=O收缩振动峰.X射线衍射(XRD)结果表明,随着PVDF含量的增加,PVDF的结晶峰明显增强.扫描电镜照片显示,当PVDF含量低于20%时,有细小的晶体颗粒均匀分布在膜的表面,而当PVDF含量高于20%时,复合膜的表面和断面都有微孔存在.热重分析(TGA)证实PVDF的引入提高了膜的热稳定性.PVDF质量分数为15%的复合膜在25℃时的质子传导率保持在0.055 S/cm,而甲醇渗透系数降低到2.28×10-7 cm2/s,能够满足直接甲醇燃料电池的需要.
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