Volumetric and viscometric study and FT-IR analysis of binary and ternary mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate, methyldiethanolamine and water

Densities and viscosities of binary mixtures {[Bmim][BF 4 ]   +   MDEA}, {MDEA   +   H 2 O} and ternary mixture {[Bmim][BF 4 ]   +   MDEA   +   H 2 O} were measured at T   =   (293.15–333.15) K. The volumetric and viscometric properties of binary and ternary mixtures, such as excess molar volume ( V E ), viscosity deviation (Δ η ), excess Gibbs energy of activation of viscous flow (Δ G ⁎E ), and Grunberg-Nissan interaction parameter ( G 12 ), were deduced from experimental data. The excess molar volumes and viscosities data were used to calculate the Redlich-Kister and Jouyban-Acree equations coefficients for binary mixtures , and Singh et al. and Jouyban-Acree extended equations coefficients for ternary mixtures. The intermolecular interactions in binary and ternary mixtures were discussed through volumetric and viscometric properties and FT-IR spectroscopic analysis .