高强度自支撑聚丙烯腈基GPE膜的原位制备及性能研究

In-situ preparation and properties of high intensity self-supported PAN-based gel polymer electrolyte membranes

通过原位聚合方法制备化学交联型聚丙烯腈基凝胶聚合物电解质(PAN-GPE)薄膜,利用红外光谱仪、万能试验机、电化学工作站和综合热分析仪分别对其分子结构、拉伸强度、离子导电率和热性能进行表征,探究二乙烯基苯(DVB)、乙二醇二甲基丙烯酸酯(EGDMA)和聚乙二醇二甲基丙烯酸酯(PEGDMA)3种交联剂对GPE膜性能的影响。研究表明,3种交联剂均可以明显提高GPE膜的拉伸强度,EGDMA的增强效果最佳,其使用量为聚合单体质量的2.5%时,PAN-GPE膜的拉伸强度由0.26 MPa增强到了5.87 MPa,提高了21.6倍;在实验范围内,3种交联剂对GPE膜的离子导电率影响不大。

The chemical crosslinked polyacrylonitrile based gel polymer electrolyte (PAN-GPE)membranes were prepared by in-situ polymerization.The molecular structure,tensile strength,ionic conductivity and ther-mal properties of PAN-GPE membranes were detected with the infrared spectrometer,universal testing ma-chine,electrochemical workstation and integrated thermal analyzer.The influence of divinyl benzene (DVB), ethylene glycol dimethacrylate (EGDMA)and polyethylene glycol dimethacrylate (PEGDMA)to PAN-GPE membranes were investigated.The results indicate that the crosslinkers can significantly improve the tensile strength.EGDMA is the most efficient to improve the tensile strength.The tensile strength of GPE membrane is improved from 0.26 to 5.87 MPa by adding EGDMA 2.5% (mass of monomers).In the experimental content, the crosslinkers have little effect on ionic conductivity of GPE membranes.