用于直接甲醇燃料电池的磺化聚芳醚酮砜/聚偏氟乙烯复合膜的制备与性能  

Preparation and Characterization of SPAEKS/PVDF Composite Membrane for Direct Methanol Fuel Cells

作　　者：王哲[1] 隋秀鹏[1] 倪宏哲[1] 吕鑫[1] 张会轩[1] 

机构地区：[1]长春工业大学合成树脂与特种纤维工程研究中心,吉林长春130012

出　　处：《高分子材料科学与工程》2013年第1期127-130,135,共5页Polymer Materials Science & Engineering

基　　金：吉林省教育厅项目(2008112)

摘　　要：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2.28×10-7cm2/s,能够满足直接甲醇燃料电池的需要。Sulfonated poly （aryle ether ketone sulfone） （SPAEKS） / polyvinylidene fluoride （PVDF） composite membranes were prepared by blend method. FT-IR shows that the stretching vibrations of C-F and O = S = O are found in SPAEKS/PVDF composite membranes. XRD results prove that the crystalline peaks of PVDF are reinforced with the content of PVDF increasing. The SEM pictures display that the crystalline particles are uniformly dispersed throughout the composite membranes matrix. The holes are observed in composite membrane when the PVDF mass fraction reaches 20 %. The thermal stability and mechanical performance of composite membrane are improved due to introduction of PVDF. The proton conductivity of composite membranes with 15 % PVDF maintains at 0. 055 S/cm, while methanol permeability decreases to 2.28 × 10-7 cm2/s. The composite membranes show very good potential usage in direct methanol fuel cells （DMFCs）.

关 键 词：直接甲醇燃料电池 磺化聚芳醚酮砜 聚偏氟乙烯 复合膜 

分 类 号：TB383[一般工业技术—材料科学与工程]