聚氨酯型固体电解质的离子导电性和红外光谱研究  

Ionic Conductive Property and Infrared Spectroscopy Characterization of Polyurethane Based Solid Electrolytes

作　　者：朱卫华[1] 杨兵[1] 王新灵[1] 唐小真[1] 王岩松[2] 

机构地区：[1]上海交通大学化学化工学院高分子材料研究所,上海200240 [2]中国科学院上海硅酸盐研究所

出　　处：《应用化学》2001年第12期939-943,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目 ( 5 990 30 0 4)

摘　　要：采用溶液聚合的方法合成了线型聚醚聚氨酯 ( PEG-PU) ,以其作为基体 ,与高氯酸钠 ( Na Cl O4)复合制得了一系列新型的聚合物固体电解质 .利用傅立叶变换红外吸收光谱 ( FT-IR)、傅立叶变换拉曼吸收光谱( FT-Raman)和交流复阻抗谱 ( IA)对该体系中聚合物 -离子之间相互作用和离子导电性能进行了研究 .结果表明 ,聚氨酯中羰基和醚氧基团与钠离子有不同的络合能力 ,二者都参与离子传输过程 .PEG-PU/Na Cl O4复合膜具有一定的导电性 .复合物的电导率随着温度的上升而提高 ,且导电行为符合 Arrhenius公式 .在一定盐浓度下 (体系氧 /钠摩尔比为 1 2时 ) ,离子电导率达到最大值 .The linear poly(ether urethane)(PEG-PU) was synthesized by solution polymerization and a series of solid polymer electrolytes based on the complexes of poly(ether urethane) with sodium perchlorate (NaClO 4) were prepared. Fourier transform-Infrared spectroscopy (FT-IR), Fourier transform-Raman spectroscopy(FT-Raman) and complex impedance analysis were used to investigate the polymer-ion interaction and ionic conductive property of the products. The results showed that the oxygen atoms of the carbonyl and ether oxygen groups have different coordination abilities for sodium cation. Both carbonyl and ether oxygen group participate in the ionic transport process in PU-based electrolytes. The ionic conductivity of the complex membrane increases with the increase of temperature. In a certain range of temperature (25~100 ℃), ionic conductivity of PEG-PU/NaClO 4 complex membrane follows the Arrhenius equation. It has been also found that, when the mole ratio of the ether oxygen to sodium cation is about 12, the PEG-PU/NaClO 4 complex exhibits a maximum ionic conductivity.

关 键 词：聚醚聚氨酯 聚合物固体电解质 离子电导率 红外光谱 离子导电性 

分 类 号：O633.1[理学—高分子化学] O631.23[理学—化学]