增塑剂对聚氨酯型固体电解质离子导电性能的影响

利用溶液聚合方法合成了聚醚聚氨酯,并以聚氨酯、高氯酸锂和增塑剂为组分,制备了一系列新型聚合物固体电解质。运用差示扫描量热分析、动态力学分析、交流复阻抗谱、扫描电镜和原子力显微镜对体系性能和形态进行了研究。结果表明,在聚氨酯/高氯酸锂复合物中,增塑剂的加人会导致体系玻璃化转变温度和力学性能有所下降,离子导电性能显著增加。在所研究的6种增塑剂碳酸丙烯酯、碳酸二乙酯、二乙二醇二甲醚、N,N-二甲基甲酰胺、聚乙二醇400和丙三醇中,聚乙二醇400对聚氨酯/高氯酸锂复合物的增塑效果最好,该体系室温电导率达到10-4S／cm。

Effect of Plasticizers on Ionic Conductivity of Polyurethane Based Solid Electrolyte

A poly(ether urethane) (PU) was synthesized via solution polymerization, which was mixed with LiClO4 and various plasticizers to generate a series of novel solid polymer electrolytes. DSC, DMA, complex impedance analysis, SEM, and AFM were used to investigate the properties and morphology of the system. Plasticizers may decrease the glass transition temperature and mechanical properties, however the ionic conductivity was increased. Six plasticizers, i.e. , propanediol carbonate, diethyl carbonate, diethylene glycol dimethyl ether, dimethyl formamide, glycerol, and glycol 400 were compared, which indicated that the glycol 400 was the best and a conductivity of 10-4 S/cm at room temperature was obtained.