一类聚醚离子液体电解质的制备和表征

Synthesis and Characterization of a Series of Polyether Lonic Liquid Electrolyte

以端羟基聚环氧氯丙烷(PECH)为原料,用直接合成法通过季铵化反应一步合成了聚醚N甲基咪唑氯盐([PECH-NMIM]Cl)、聚醚喹啉氯盐([PECH-QL]Cl)、聚醚吡啶氯盐([PECH-PY]Cl)、聚醚N甲基吗啉氯盐([PECH-NMM]Cl)等4种阴离子为氯离子的聚醚季铵盐。再以聚醚季铵盐和四氟硼酸钠为原料,用离子交换法通过置换反应一步合成了聚醚N甲基咪唑四氟硼酸盐([PECH-NMIM]BF4)、聚醚喹啉四氟硼酸盐([PECH-QL]BF4)、聚醚吡啶四氟硼酸盐([PECH-PY]BF4)、聚醚N甲基吗啉四氟硼酸盐([PECH-NMM]BF4)。考察了反应温度、反应配比、反应时间、PECH的数均分子量对季铵化反应取代度的影响;用红外光谱和核磁共振氢谱对聚醚离子液体进行了结构表征。

Four kinds of polyether quaternary ammonium salts were synthesized through one step by using quaternization reactions.These were polyether quaternary ammonium salts including polyether-N-methylimidazolium chloride([PECH-NMIM]Cl),and polyether-quinoline chloride([PECH-QL]Cl),polyether-pyridine chloride([PECH-PY]Cl),and polyether-N-Methylmorpholine chloride([PECH-NMM]Cl).Then,four hydrophilic tetrafluoroborate salts were prepared by metathesis reactions from the corresponding chloride using sodium tetrafluoroborate which were polyether-N-methylimidazolium tetrafluoroborate ([PECH-NMIM] BF4),polyether-quinoline tetrafluoroborate ([PECH-QL] BF4),polyether-pyridine tetrafluoroborate([PECH-PY] BF4),polyether-N-Methylmorpholine tetrafluoroborate ([PECH-NMM] BF4).The influences of the reaction temperature,reaction reactant mixture ratio,reaction time and number average relative molecular mass of graft PECH on the degree of substitution were investigated.The structures of polyether ionic liquids were characterized by FT-IR and 1H NMR.