Density and surface tension of binary mixtures of 1-ethyl-3-methylimdazolium nitrate with alcohols

Abstract

Abstract New experimental data of densities and surface tensions are presented for the binary mixtures of the ionic liquid 1-ethyl-3-methyl imidazolium nitrate ([EMIM]NO 3 ) with methanol and ethanol. Measurements were performed at 298.15 K and atmospheric pressure, covering the whole composition range. Excess molar volumes V E and the surface tension deviations δγ have been determined. For the excess molar volumes of binary mixture, there is a region of negative V E at low IL mole fraction, passing through a minimum and then V E increases and becomes positive, showing maximum at higher IL mole fraction. It is shown that the surface tension deviations δγ of [EMIM]NO 3 + methanol system are positive but those of [EMIM]NO 3 + ethanol system are negative over the entire mole fraction range.