Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The density and viscosity data of three binary liquid mixtures containing the ionic liquid (IL) 1-ethyl-3-methylimidazolium tetrafluoroborate and organic solvents, dimethylacetamide (DMAC), dimethylformamide (DMF), and dimethyl sulfoxide (DMSO) were obtained under atmospheric pressure, at temperatures of 303.15 to 333.15 K over the entire composition range. A vibrating-tube digital density meter and a capillary viscometer were used for density and viscosity measurements, respectively. Excess molar volumes (VE) and viscosity deviations (?) for the binary mixture system were calculated from the experimental data and were satisfactorily fitted with the Redlich Kister equation. Adding DMAC, DMF, and DMSO led to negative values of VE and ?. This finding revealed that the packing of the constituents was more efficient, and the anion cation interaction of IL was decreased in the binary liquid mixtures. The sequences of VE and ? for the three binary liquid mixtures in this study are also discussed using intermolecular interactions.