Prigogine–Flory– Patterson theory to correlate the excess molar volume and study of interactions for aqueous solutions of some choline chloride based deep eutectic solvents

The excess molar volumes (VE) for aqueous solutions of the deep eutectic solvents (DESs) based on choline chloride (ChCl) as hydrogen bond acceptor (HBA) with some hydrogen bond donors (HBDs), ethylene glycol (EG), oxalic acid (OA), and malonic acid (MA) were calculated from the density measurements. To develop and design processes and understand molecular interactions the excess properties of aqueous DESs solutions are needed. The obtained values of VE in the whole concentration range are negative and needless to say that they increase with increasing temperature which indicates strong interactions between DESs and water. The excess molar volumes values were correlated with the use of Prigogine–Flory–Patterson (PFP) theory.