Density, Speed of Sound, Viscosity, and Excess Properties of Binary Mixtures Formed by Ethanol and Bis(trifluorosulfonyl)imide-Based Ionic Liquids

Abstract

In this work, viscosities, densities, and speeds of sound of three binary mixtures containing the ionic liquids 1-ethyl-3methylimidazolium bis(trifluoromethylsulfonyl)imide, [emim][NTf 2 ], 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [bmim]-[NTf 2 ], and 1-hexyl-3-methylimidazo-lium bis(trifluoromethylsulfonyl)imide, [hmim][NTf 2 ], mixed with ethanol were measured at atmospheric pressure in the range of (278.15 to 338.15) K, covering the entire range of compositions. From these experimental data, the excess isentropic compressibility and molar isentropic compressibility of pure components and mixtures have been calculated. Additionally, excess properties, such as viscosity deviation, excess molar volume, excess isentropic compressibility, and excess molar isentropic compressibility, have been calculated and fitted with the Redlich−Kister polynomial equation.

Self-diffusion, velocity cross-correlation, distinct diffusion and resistance coefficients of the ionic liquid [BMIM][Tf2N] at high pressure

“…c δ (=B/T0) is the Angell strength factor; a lower δ indicates a more fragile liquid.rotating cylinder results and those below 253 K have been omitted from the fit. Overall, there is good agreement with the rotating cylinder viscometer results of Salgado et al52 and of Hiraga et al,54 the oscillating piston results of Atilhan et al51 and the falling ball results of Salinas et al58 The capillary viscometer results of Pan et al,48 the rotating cylinder results of Tariq et al,55 and the cone and plate viscosities of Vranes et al 50 trend lower at lower temperatures. For [HMIM][Tf 2 N], our data lie slightly below the correlation from the 2009 IUPAC sponsored round-robin study 49 of a specific sample of [HMIM][Tf 2 N] at lower temperatures and slightly above at high temperatures.…”

“…There is some distortion of the fit by the sub-zero 44 , despite the higher water content in their sample, and with the falling ball results of Salinas et al 58 The rotating cylinder results of Tariq et al 55 and of Iguchi et al 57 agree well with one another and with our rotating cylinder data but all three sets trend higher than the correlation above 70 o C. The vibrating wire results of Diogo et al 53 also trend higher with increasing temperature, but above 40 o C. The cone and plate data 45 One can predict glass temperatures, T g , from the VFT equation parameters using the relationship of Angell, which we have employed in previous work. 3,6,36 In each case, there is good agreement with experimental values from the literature ( Table 4).…”

Binary mixtures of ([C 4 mim][NTf 2 ] + molecular organic solvents): Thermophysical, acoustic and transport properties at various compositions and temperatures

“…Furthermore, the study of physicochemical properties of binary mixtures of ILs + MOS furnishes extensive information about molecular interaction (ion dipole, dipole-dipole, hydrogen bonding) exist in their mixtures [8][9][10][11][12]. [20], + ethyl acetate, ethanol [21,23,31], isopropyl acetate, isopropanol [22], THF, Acetonitrile [24][25][26], propylene carbonate [28], γ-butyrolactone [29], 2,2, 2-trifluoroethanol (TFE) [30] ). [21,22].Likewise, Monica et al [24][25][26] [57].…”

Extension of the validation method for vapor–liquid equilibrium data to systems with nonvolatile components

“…The VLE data published by Kato and Gmehling, shown in Figure a,b, were correlated with the values of other mixing properties taken from the literature . The fit for γ 1 , Figure b, is acceptable and produces a coherent representation for γ 2.…”