相晓晴,苏宝根,钱思恒,徐倩倩,鲍宗必,邢华斌,杨启炜,任其龙

• 1:浙江大学生物质化工教育部重点实验室浙江大学化学工程与生物工程学院

摘要(Abstract)：

采用毛细管气相色谱法,应用3根不同膜厚的1-丁基-2,3-二甲基咪唑双(三氟甲烷磺酰)亚胺盐([bmmim][NTf2],1-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide)离子液体壁涂毛细管柱,分别在40、50和60℃下测定了60种有机物的保留时间。使用改进方程计算得到了60种有机物在[bmmim][NTf2]中的无限稀释活度系数,并通过无限稀释活度系数计算得到了无限稀释选择性系数、容量因子等热力学参数。通过线性拟合求得[bmmim][NTf2]的LSER模型关联参数,发现最显著的作用力是偶极/极化作用和氢键碱性,且[NTf2]?的氢键碱性小于[dca]?,与[PF6]?相近,同时验证了咪唑阳离子的2位H被甲基取代后,氢键酸性明显降低。此外,探讨了将[bmmim][NTf2]用于乙腈-乙醇、丙酮-环己烷、苯-环己烷、甲苯-甲基环己烷等难分离体系分离的可行性。

关键词(KeyWords)： 无限稀释活度系数;离子液体;毛细管柱;线性溶剂化能模型;气相色谱法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21436010;21222601;91434115);; 浙江省自然科学基金(LR13B060001);; 教育部新世纪优秀人才支持计划(NCET-13-0524)资助

作者(Author): 相晓晴,苏宝根,钱思恒,徐倩倩,鲍宗必,邢华斌,杨启炜,任其龙

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