双咪唑离子液体的合成及其与乙腈混合二元体系电导率和粘度的研究

Synthesis of Bis-imidazole Ionic Liquids and Conductivity and Viscosity of Binary System Mixed with Acetonitrile

以N-甲基咪唑、1,6-二溴己烷和无水氯化锌为原料,采用两步法合成了一种新型的非水溶性离子液体,其结构经1H NMR,13C NMR和元素分析表征。并对该离子液体与乙腈的混合体系在293.15~343.15 K的粘度与电导率进行了研究。结果表明:温度对混合体系的粘度和电导率均有影响,在293.15~343.15 K,随着温度上升,混合体系的粘度逐渐降低,电导率逐渐升高。随着浓度增大,混合体系的粘度呈现上升趋势,其电导率表现出先增大后减小的规律,当浓度为0.25 mol·kg-1时,电导率最大。

A new type of non-water soluble ionic liquid was synthesized by two-step synthetic method using N-methylimidazole,1,6-dibromohexane and anhydrous zinc chloride as raw material. The structure was characterized by1 H NMR,13 C NMR and elemental analysis. The viscosity and conductivity of the mixture system of the ionic liquid and acetonitrile at 293. 15 ～ 343. 15 K were studied with the change of temperature and solution concentration. The results showed that temperature has an effect on the viscosity and conductivity of the mixed system,from 293. 15 K to 343. 15 K,the viscosity of the mixed system gradually decreases and the conductivity gradually increases with the temperature rising.And as the concentration increased,the viscosity of the mixed system showed an upward trend,and its electrical conductivity had a regular pattern of increasing first and then decreasing. When the concentration was 0. 25 mol·kg^-1,the conductivity attached to maximum.