醚基功能化离子液体[C_(2)2O1IM][NTf_(2)]+甲酰胺(FA)/二甲基甲酰胺(DMF)二元混合物的物理化学性质研究

The physicochemical properties of binary mixture of ether functionalized ionic liquid[C_(2)2O1IM][NTf_(2)]+formamide(FA)/dimethylformamide(DMF)

1-(2-甲氧基乙基)-3-乙基咪唑双三氟甲基磺酰亚胺盐([C_(2)2O1IM][NTf_(2)])作为醚基功能化离子液体具有热稳定性好、低黏度、较高的电导率等许多优良特性。对[C_(2)2O1IM][NTf_(2)]+甲酰胺(FA)/二甲基甲酰胺(DMF)二元混合物进行了研究,测定在温度15~50℃和大气压下整个组成范围内此二元混合物的密度ρ、声速u和黏度η。根据实验数据,计算了体系的超额摩尔体积V_(m)^(E)、等熵压缩系数偏差Δκ_(s)和黏度偏差Δη。所得结果用这些混合物中发生的分子间相互作用来解释。

1-(2-methoxyethyl)-3-ethyl imidazole bis(trifluoromethyl)sulfonyl imide salt([C_(2)2O1IM][NTf_(2)])as ether functional ionic liquid has many excellent characteristics such as good thermal stability,low viscosity and high conductivity.In this work,the binary mixture of([C_(2)2O1IM][NTf_(2)])+formamide(FA),dimethylformamide(DMF)was studied.The density ρ,sound velocity u and viscosity η of the binary mixture in the whole composition range were measured at the temperature range of 15—50℃and atmospheric pressure.According to the experimental data,excess molar volume V_(m)^(E),isentropic compression coefficient deviation Δκ_(s) and viscosity deviation Δη of the system were calculated.The results can be explained by intermolecular interactions in these mixtures.