以水作相分离造孔剂制备P(VDF-HFP)/PMMA聚合物电解质膜

Preparation of P(VDF-HFP)/PMMA Blend Polymer Electrolyte Membrane with Water as Material for Phase Separation and Pore Producer

介绍了一种以水代替常用的有机物质作为相分离造孔剂制备混合型聚合物电解质的新方法 .所研究的混合型聚合物为聚 (偏二氟乙烯 -六氟丙烯 )和聚甲基丙烯酸甲酯的混合物 .扫描电镜 SEM图表明这种混合型聚合物膜具有蜂窝状结构 ,有利于膜电导率的增加 .利用 FTIR,XRD和 DSC等方法研究了混合型聚合物电解质中两种聚合物间的相互作用 .用电化学交流阻抗方法测得在 3 0℃下 P( VDF-HFP) /PMMA摩尔比为 1 :1的混合型聚合物电解质的离子电导率为 0 .80 4× 1 0 - 3S/cm.对照其它方法 ,本方法具有制备容易。

A new method is proposed to prepare blend polymer electrolyte by using water as the material for phase separation and pore producer instead of traditional organic material. The blend polymer electrolyte consisting of polyvinylidene fluoride-co-hexafluoropropylene P(VDF-HFP) and poly(methyl methacrylate) (PMMA) was prepared by this method. The SEM images show that the blend polymer electrolyte films have alveolate network structures, which benefit the increase of ionic conductivity. The interaction between two kinds of polymers within the blend polymer was confirmed by FTIR, XRD and DSC studies. The ionic conductivity for the blend polymer electrolyte film with m(VDF-HFP)∶ m(PMMA)=1∶1 was measured as 0.804×10 -3 S/cm at 30 ℃ by using electrochemical impedance method. Compared with other approaches the method introduced here is a very easy, cost-saving, and more environmental friendly method.