醇胺离子液体的合成及其溶液体系电导率的测定和关联

Preparation of Hydroxyl Ammonium Ionic Liquids and Determination and Correlation of Electrical Conductivity Properties of Their Aqueous Ethanol Solutions

采用中和法合成了乙醇胺醋酸([HMEA]Ac)、二乙醇胺醋酸([HDEA]Ac)和二乙醇胺盐酸([HDEA]Cl)3种醇胺离子液体,测定了298.15 K时[HMEA]Ac、[HDEA]Ac和[HDEA]Cl在水和乙醇中全浓度范围内的电导率,并采用Casteel–Amis经验方程关联了上述体系电导率随浓度的变化关系.结果表明,上述醇胺离子液体在水和乙醇中的电导率随体系浓度的增加均先升高后降低;在相同条件下,同种离子液体在水中的电导率均远大于在乙醇中的电导率.

Three hydroxyl ammonium ionic liquids （ILs） ： monoethanolammonium （ [ HMEA] [ Ac] ）, diethano- lammonium acetate （ [ HDEA] [ Ac] ）, and diethanolammonium chloride （ [ HDEA] C1） were prepared. The e- lectrical conductivity of [ HMEA ] [ Ac ], [ HDEA ] [ Ac ], and [ HDEA ] C1 in water and ethanol over the entire composition range were determined at 298.15 K. The concentration dependence of electrical conductivity was fit- ted according to the empirical Casteel - Amis equation. The results showed that the conductivity of ILs in water or ethanol initially increased and then decreased as the concentration of ILs increased, and the conductivity of ILs in water was higher than that in ethanol in the same condition.