Densities, Viscosities, and Excess/Deviation Properties of the Ternary System 2-(Methylamino)ethanol + Dimethyl Sulfoxide + Water and the Binary Subsystems

Abstract

Densities and viscosities of the ternary system 2-(methylamino)­ethanol (MAE) + DMSO + water and its corresponding binary constituents have been measured experimentally over the whole composition range and the temperature range from 293 to 353 K. The excess molar volumes (V E), viscosity deviations (Δη), and excess free energies of activation (ΔG *E) of the binary systems were correlated with the Redlich–Kister equation, while the experimental data of ternary mixtures were represented by using Nagata–Tamura, Cibulka, Singh, and Redlich–Kister equations. For binary mixtures, the V E values of aqueous DMSO and aqueous MAE are negative but positive for the nonaqueous blend of MAE + DMSO. The values of Δη and ΔG *E of aqueous binary systems are positive and negative, respectively, for the binary mixture of MAE + DMSO over the whole composition range and at all temperatures. These behaviors can be interpreted with molecular interactions and structural effects. The V 123 E and Δη123 values have also been derived from the experimental data of the ternary system. It was found that the V 123 E values are negative except for the regions highly deficient in water. The values of Δη123 become more positive in both H2O- and MAE-rich regions that were highly poor in DMSO. The observed behaviors indicate that the properties of the ternary system investigated are dominated by binary effects.

Measurement and Modeling of Thermophysical Properties of the Ternary System 2-(Butylamino)ethanol + Dimethyl Sulfoxide + Water and Its Binary Subsystems

“…In addition, as the temperature increases, the V E values of all binary systems increase to a certain extent. In our previous work, 27 we have found the similar results: the positive V E of blend MAE + DMSO and the negative V E of blends DMSO + H 2 O and MAE + H 2 O. However, the V E of BAE + DMSO is more positive (from about 0.25 to 0.45 cm −3 mol −1 at 293.15 K) than that of MAE + DMSO at the same temperature.…”

“…For the binary system of DMSO + H 2 O, the measured data in the previous work 27 have been compared with the literature data 35,36,42−44 over the whole composition range at 303.15 K, indicating good agreement except for the work of Alam et al 35 Therefore, the data of the DMSO + H 2 O binary system are not tabulated in this work. Only few density and viscosity data points for BAE + water binary blends are available for comparison in the investigated temperature range in this work, 45,46 as shown in Figure S3.…”

“…So, a simplified Nagata−Tamura equation (eq 7) was used to fit the ternary contribution Δ 123 . 25,27 against the system compositions in the ternary system BAE (1) + DMSO (2) + H 2 O (3). The representative plots at 293.15, 323.15, and 353.15 K are shown in Figure 5.…”

Solubility of N2O and CO2 in Dimethyl Sulfoxide, 2-(Butylamino)ethanol, and Their Water-Lean Blends

“…The sign of V E can reflect the nonideal behavior of the composition mixing. In our previous work,33 the excess molar volume V E for the 2-(methylamino)ethanol (MAE)/DMSO blends was observed positive over the entire composition range. The same phenomenon was also found for nonaqueous BAE/DMSO blends in a recent work.…”

Viscosities, Free Energies of Activation and their Excess Properties in the Binary Mixtures of Some Monoalkanolamines with Acetonitrile between 303.15 and 323.15 K: Experimental and Correlative Approach

“…Two and three parameter-based models: The two-parameter Heric equation (HRC) is of the following form [52]: The Jouyban-Acree model (JA) [57,58] is used for correlating the viscosities of liquid mixtures at various temperatures. The equation is proposed to be (24) Fitting capabilities of simple polynomial equations and viscosity correlations were tested for different degrees of polynomials by calculating the standard percentage deviation, , as:…”