[Bmim]Cl-酸二元体系电导率的测定

The Determination of Electrical Conductivity of 1-butyl-3-methylimidazolium Chloride-acids Binary System

利用氯代正丁烷和N-甲基咪唑在摩尔比1：1.1,微波功率550W,反应温度100℃,反应50min条件下合成了[Bmim]Cl,并进行了纯化.测定了[Bmim]Cl和有机酸（甲酸、乙酸、丙酸）按质量比1：0.5、1：1、1：1.5和1：2混合后二元体系的电导率,并用MATLAB软件进行了数据拟合.结果表明：在293.15-348.15K的温度范围内,纯[Bmim]Cl的电导率随温度的升高而增大;在[Bmim]Cl与酸的质量比1：0.5~1：2范围内,二元体系的电导率随着酸添加量的增多而增大,且随着温度的升高而增大,但当有机酸的质量超过[Bmim]Cl的质量的1.5倍后,电导率增大的趋势变缓.并且电导率随温度的变化关系符合Kohlraush关系式.

When the conditions were the molar ratio of N - methylimidazole and n - butyl chloride of 1 ： 1. 1, microwave power of 550W, reaction temperature of 100 ℃ and reaction time of 50 min, [ Bmim] CI was synthesized and purified. Not only the electrical conductivity of binary system mixed by [ Bmim ] C1 and organic acids （formic aid, acetic acid and propionic acid） in the mass ratios of 1：0.5, 1：1, 1：1.5 and 1：2 were measured, but also the experimental data were fitted by Matlab software. The results suggested that the electrical conductivity of pure [ Bmim ] C1 increased with the increasing temperature in the temperature range of 293.15 -348. 15 K. When the range of the mass ratios of [Bmim]C1 and acid was 1：0.5 -1：2, the electrical conductivity of binary system increased with the increasing weight of added acid, and at the same time, it increased with the increasing temperature. However, when the weight of added organic acid was greater than 1.5 times of [ Bmim ] C1, the increase of electrical conductivity became slowly. Furthermore, the relationship between electrical conductivity and temperature conformed to Kohlraush formula.