Density and Viscosity for Binary Mixtures of the Ionic Liquid 1-Butyl-3-methylimidazolium Tetrafluoroborate with 2-Propanol, N,N-Dimethylacetamide and N,N-Dimethylformamide at 293.15-323.15 K: Experimental and PC-SAFT Modeling

摘要

For three binary mixtures composed of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate -([Bmim][BF4]) with 2-propanol, N,N-dimethylacetamide (DMA) and N,N-dimethylformamide (DMF), the values of the experimental density and viscosity over the whole composition range for T = (293.15 to 323.15 K) are reported. Excess molar volume (V) over bar (i), partial molar volume V i, and the deviation in viscosity. Delta(eta) are calculated and explained in order to clarify the intermolecular interactions among the species in the mixtures. For all of the binary mixtures, the negative values of V-m(E) m and Delta(eta) were fitted with the Redlich-Kister polynomial function. An increase in temperature decreases the values of Delta(eta) mand increases the values of Delta(eta) . The results have been discussed regarding binary interaction forces and the formation of a complex between dissimilar molecules. For the correlation and prediction of the binary system densities, perturbed chain statistical associating fluid theory (PC-SAFT) was used. The results obtained from this theory are consistent with the experimental data.