Researching Of The Thermodynamics And Electrical Conductivity Properties Of Pyridine (Trilfuoromethyl)Imide Acid Ionic Liquid And Binary System

Ionic liquids is an ionic compounds at room temperature or is close to it^[1]. Its excellentphysical and chemical properties^[2], for example:as almost no vapor pressure, high thermalstability, good electrical conductivity and wide temperature stability range, for this it canreplace of organic solvents of high volatility, toxic, flammable. In the development ofresearch it has a very broad range of applications.In this paper, a new kind of ionic liquids of [C₄M₃Py][NTf₂]（3-methyl-N-butyl-pyridinetrifluoromethyl sulfonic acid imide） is researched, and measured the thermodynamicproperties and conductivity properties of the binary system of ionic liquids and commonorganicsolvent. The configuration of ionic liquids is novel, synthetic process is simple,relatively inexpensive raw materials, meet the research needs of low-cost ionic liquids, but itsphysicochemical properties based on research data is lack, which are precisely the key ofdevelopment of the application of ionic liquids. For this, we choose the [C₄M₃Py][NTf₂] as aresearch object, complete the following tasks:This paper the [C₄M₃Py][NTf₂] ionic liquid is synthesized, and measure the density,surface tension and other thermodynamic properties, through above data, discussed thevolume properties, surface properties, use of Glasser theory to calculate the molecularvolume, ion volume, standard entropy value. To use the Kabo experience equations forestimating the material lattice energy. By the Rebelo equation calculated enthalpies ofvaporization.By Internal voids in the nature of this ionic liquid, has once again proven theapplicability of the gap model of pure ionic liquids obtained an estimate of the constantpressure coefficient of thermal expansion and through the gap theory, results and measuredvalues are basically the same, the gap model. Indicate that the gap model is reasonable.Measured the electrochemical properties of viscosity and conductivity of pure ionicliquids, fitting parameters is calculated by the Vogel-Fulcher-Tamman （VFT） formula.Indicate that the VFT equation can describe the dynamic behavior of the ionic liquid andconductivity changes. Through the electrical conductivity of the pure ionic liquid, molarconductivity can be calculated. Then measured the conductivity properties of the binarysystem of ionic liquids and common organicsolvent, respectively （[C₄M₃Py][NTf₂]+methanol）、（[C₄M₃Py][NTf₂]+ethanol）、（[C₄M₃Py][NTf₂]+isopropanol）、（[C₄M₃Py][NTf₂]+acetonitrile）、（[C₄M₃Py][NTf₂]+propylene carbonate（DMC）） at different concentrations ofdifferent temperature conductivity, they are in line with the Arrhenius equation, and calculated the apparent activation energy, A good description by the Castell-Amis empirical equation inthe binary system of relationship of concentration and conductivity.