Effects of water on the properties of acetamide-KSCN eutectic ionic liquids at several temperatures

The effects of water on the density, conductivity and viscosity of acetamide-KSCN eutectic ionic liquid were investigated at atmospheric pressure and temperatures from 303.15 to 343.15 K. The density and viscosity values decrease monotonically when the water is added and the data decrease with increasing temperature. From the experimental values, the molecular volume Vm, excess molar volumes VE and viscosity deviation Δη of acetamide-KSCN (3:1) aqueous solutions were calculated. The excess molar volumes VE and viscosity deviation Δη were both well fitted by a Redlich-Kister equation. The conductivity of the solutions increases gradually first and then decreases dramatically with increasing mole fraction of water. The mass fraction of water dependence of electrical conductivity was fitted by a line equation at salt-rich region. The speculated interactions of eutectic ionic liquid with water account for the changes of physiochemical properties.