Prigogine-Flory-Patterson evaluation of systems with ionic liquids + water or methanol: A study of specific interactions

Descriptions of the assets of combinations of ionic liquids and polar compounds are very important for engineering projects. In this study, the modeling of binary systems involving different cations and anions was performed to observe the structural influence and the level of interaction with water and alcohol. The Prigogine-Flory-Patterson equation of state makes possible the evaluation of the level of interaction of the mixture through the Flory interaction contribution. The contribution through the characteristic pressure was shown to be of little relevance compared to the contributions of free volume and characteristic pressure. The binary mixtures, for the most part, showed a negative value, which demonstrates the strong interactions between ionic liquids and the studied compounds.