Study On Physicochemical Properties Of Halogenated Imidazole Ionic Liquid + Fatty Alcohol Binary Solvent System

Ionic liquids (ILs) are increasingly attracting interest in both the industrial and academic field due to its unique physical and chemical properties. However, the viscosity of the IL is usually dozens or even hundreds of organic solvent, which bring inconvenience at room temperature. So adding a small amount of organic solvent in IL can solve the transmission question simply and effectively. Therefore, this paper has carried out the physical and chemical properties of IL mixed with fatty alcohol system. The main research are as follows:1. Ionic liquids [Cnmim]X (Cnmim= 1-alkyl-3-methylimidazolium; n= 6,8,10 for hetyl, octyl and decyl)+fatty alcohol{ethylene glycol (EG)/1,2-propanediol (PG)/1-propanol (NPA)} binary systems have been investigated. Herein, the density, refractive index, and viscosity of the mixtures at atmospheric pressure from 288.15 to 333.15 K were reported.2. From the temperature, content of ionic liquids, the length of carbon chain and the solvent aspects to discuss the impact on the solution properties.3. The volumetric properties including excess molar volume and apparent molar volume have been calculated from the experimental data.4. The molar excess Gibbs, the refractive index and viscosity deviations from the ideal behavior have been obtained.5. The density, refractive index, and viscosity of the mixtures were well fitted to an empirical equation and the excess molar volume, the molar excess Gibbs and the refractive index deviations were well related to the Redlich-Kister equation.Our results show that EG/PG/NPA can effectively adjust the physicochemical properties of 1-alkyl-3-methylimidazolium ionic liquids. The obtained volumetric and excess Gibbs free energies of activation of viscous flow data are helpful to understand mixing effects and other existing interactions.