多功能梳状聚合物电解质的合成及其性能

Synthesis and Properties of Multifunctional Comblike Polymer Electrolytes

以聚乙二醇单甲醚(PEGME)为侧链,马来酸酐/1-十八碳烯交替共聚物(PMAO)为骨架,制备出具有生物相容性的多功能梳状聚合物(PMAO-PEGME)。该聚合物分别与CH3OH和LiOH反应,制得梳状马来酸酐/1-十八碳烯交替共聚物多缩乙二醇酯(PMAO-PEGME-ME)和单离子聚合物电解质(即梳状马来酸酐/1-十八碳烯交替共聚物多缩乙二醇酯羧酸锂PMAO-PEG-MELi),用FT-IR1、H-NMR、DSC、交流复阻抗谱等对得到的聚合物电解质进行了表征。结果表明:随着LiClO4浓度的增加,PMAO-PEGME-ME/LiClO4体系的电导率呈现先上升后下降的变化趋势,符合通常的聚合物电解质电导率与盐浓度的依赖关系。当每千克聚合物中含1.5 mol Li-ClO4时,电导率达到最大值,室温下为1.01×10-5S/cm。PMAO-PEGMELi的室温电导率可达3.57×10-7S/cm。

Biocompatible and muhifunctional comblike polymer（PMAO-PEGME） was synthesized by using poly（ethylene glycol）methyl ether as the side chain, poly（maleic anhydride-alt-1-octadecene） as the backbone. The comblike multiethylene glycol poly（maleic anhydride-alt-1-octadecene） ate （PMAO-PEGME-ME）and the solid single-ion polymer electrolyte（PMAO-PEGMELi）were prepared by adding CH3 OH and LiOH into PMAO-PEGME,respectively, and were characterized by using FT-IR, 1^H-NMR,DSC and impedance technique. With the increasing of LiClO4 concentration, the conductivity of PMAO-PEGMEME/LiClO4, presented to decline after rising. It is in accordance with the general dependency relationship between the conductivity of polymer electrolyte and salt concentration. When n（LiClO4）/m（Polymer）= 1.5 mol/kg,the highest ambient conductivity is 1.01 ×10^-5S /cm. PMAO-PEGMELi has an ionic conductivity of the order of 10^-7 S/cm at room temperature.