Study of New Type Ionic Liquid Prepared by Phenol and Caprolactam

The new type ionic liquid is synthesized by phenol and caprolactam at different molar ratios,and the physical properties are measured,such as the melting point,the density,conductivity,soluble,etc.The results show that the melting point at phenol/caprolactam of 3.5:1 is about-22℃,which is much lower than those of raw materials.The density is bigger than that of the water and alcohol,and decreases with the temperature increase.The conductivity in 10-4 S/m magnitude decreases with the increasing of temperature and accords to Arrhenius equation.The solubility of ionic liquid shows that it is miscible with organic solvent such as alcohol,ester,etc.The results of IR show that the ionic liquid has the characteristic peaks of phenol and caprolactam.