Measurements and correlation of viscosity and conductivity for the mixtures of ethylammonium nitrate with organic solvents

摘要

Transport physicochemical properties of binary mixtures ionic liquid/organic solvent (IL/OS) were studied. Systematical measurements of viscosities (η) and conductivities (Λ) for the binary mixtures of ethylammonium nitrate (EAN) with different OS, over the whole composition range and at temperature ranging from 273.15 K to 313.15 K, were performed. The variation tendency of viscosities/conductivities with composition of the mixtures was explained through the disruption of molecular solutes to ionic association or aggregation of the ionic liquids and correlation between them is carried out by means of Walden product (W). A semi-empirical equation proposed by Jones and Dole was used to describe the variation of viscosity with salt concentration (C). At low concentration of EAN, molar conductivity follows cube root law predicted by the quasi-lattice model. The two transport processes are well described by Arrhenius type laws from which the activation energies for the viscosity (E_(a,η)) and conductivity (E_(a,Λ)) are deduced.