磺化聚醚醚酮(sPEEK)/SiO_2杂化质子交换膜的制备与表征  

Preparation and characterization of sPEEK/SiO_2 hybrid proton exchange membrane

作　　者：靳豪[1] 谢晓峰[1] 尚玉明[1] 冯少广[1] 吕亚非[2] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《清华大学学报（自然科学版）》2007年第12期2213-2215,2218,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50573041);国家"八六三"高新技术项目(2006AA05Z138)

摘　　要：为提高磺化聚醚醚酮(sPEEK)质子交换膜的耐甲醇渗透性能,用正硅酸乙酯为前驱体制得硅溶胶,在sPEEK中原位生成SiO2,制备了直接甲醇燃料电池用sPEEK/SiO2杂化质子交换膜材料,用核磁共振(1H-NMR)和Fourier红外光谱(FT-IR)表征了膜的化学结构,用扫描电子显微镜(SEM)观察了sPEEK与SiO2的复合形态,用交流阻抗仪和气相色谱仪分别测定了膜的质子传导率和甲醇渗透系数。实验结果表明,在质子传导率没有严重降低的同时,杂化膜的阻醇性得到了较好的改善。sPEEK/SiO2 hybrid proton exchange membranes were prepared by in situ generation of SiO2in an sPEEK matrix to improve the methanol resistance of sPEEK for direct methanol fuel cell （DMFC） applications. Tetraethoxy silane was used as the inorganic precursor. The chemical structure of the hybrid membrane was characterized by 1^H-NMR and FT-IR spectroscopy. The composite behavior was studied by a scanning electronic microscope. The proton conductivity was determined using an AC impedance analyzer. The methanol permeation coefficient was determined using gas chromatography. The results show that the methanol resistance is greatly improved without significantly reduceing the proton conductivity.

关 键 词：磺化聚醚醚酮 杂化材料 直接甲醇燃料电池 质子交换膜 

分 类 号：TB324[一般工业技术—材料科学与工程]