Agieienko, Vira and Stepanova, Ekaterina A. and Buchner, Richard (2025) Density, Viscosity, and Electrical Conductivity of (Choline Chloride plus Ethylene Glycol) Mixtures Covering Concentrations from Neat Molecular Solvent to Supersaturated Solutions. JOURNAL OF CHEMICAL AND ENGINEERING DATA, 70 (5). pp. 2044-2056. ISSN 0021-9568, 1520-5134
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This contribution provides data for density, rho, viscosity, eta, and electrical conductivity, kappa, of [choline chloride (ChCl, component 1) + ethylene glycol (EG, 2)] mixtures. ChCl concentrations from neat EG to x 1 = 0.333 (ChCl:2EG) were covered for rho and eta. For kappa, additionally, x 1 = 0.352 was studied. Temperature ranges covered are T = 278.15-363.15 K for rho and eta, and T = 278.15-338.15 K for kappa. The observed temperature dependence at a given x 1 could be empirically described by a quadratic function for rho and the Vogel-Fulcher-Tammann equation for eta and kappa. Properties obtained for ChCl:2EG were compared to the data published so far. It turned out that sample purity, including moderate water content, does not greatly influence ChCl:2EG density. However, eta(T) decreases substantially with rising water content. With some exceptions, most of the published eta(T) and kappa(T) data strongly disagree with the present fits. The properties derived from the measured data allowed some conclusions on interspecies interactions: apparent molar volumes obtained for the solute suggest its structure-breaking effect on the inherent EG structure, with solute-solute contacts playing the dominant role here. Despite the rather high conductivity, {ChCl + EG} mixtures show low ionicity, indicating pronounced ChCl self-aggregation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DEEP EUTECTIC SOLVENTS; IONIC LIQUIDS; PHYSICOCHEMICAL PROPERTIES; ARTIFICIAL-INTELLIGENCE; PHYSICAL-PROPERTIES; AQUEOUS MIXTURES; BINARY-MIXTURES; WATER; TEMPERATURE; ETHALINE |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Jun 2026 08:59 |
| Last Modified: | 17 Jun 2026 08:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67248 |
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