【摘要】 以磺化聚醚醚酮(SPEEK)为基体,通过溶胶-凝胶法制得SPEEK/SiO2/PWA复合质子交换膜,采用红外光谱、扫描电镜、交流阻抗和热重分析等方法研究了复合膜的结构与性能。结果表明,无机粒子均匀地分散在聚合物基体中,其粒径不超过70 nm。SiO2与SPEEK之间的共价交联使复合膜的甲醇渗透率和溶胀度明显降低,热稳定性也得到提高。同时磷钨酸(PWA)的掺入又赋予膜较高的质子传导性能。在此基础上可制备具有高质子传导和高阻醇性能的复合质子交换膜。更多还原

【Abstract】 Sulfonated polyether ether ketone(SPEEK)/SiO2/phospho-wolframic acid(PWA) composite proton exchange membranes were prepared with SPEEK matrix by sol-gel technique.The structure and properties of the composite membranes were characterized by Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),AC impedance method and thermogravimetric analysis(TGA).As a consequence,the inorganic particles homogeneously distribute within the SPEEK matrix and the diameter of the inorganic particles does not exceed 70 nm.The covalent cross-linking structure between SiO2 and SPEEK decreases remarkably the methanol permeability and swelling of composite membrane.The incorporation of PWA causes better proton conductivity.The composite membranes with higher proton conductivity and lower methanol permeability can be prepared.更多还原