Density, viscosity, and conductivity of choline chloride plus ethylene glycol as a deep eutectic solvent and its binary mixtures with dimethyl sulfoxide

Harifi-Mood, Ali Reza and Buchner, Richard (2017) Density, viscosity, and conductivity of choline chloride plus ethylene glycol as a deep eutectic solvent and its binary mixtures with dimethyl sulfoxide. JOURNAL OF MOLECULAR LIQUIDS, 225. pp. 689-695. ISSN 0167-7322, 1873-3166

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Abstract

Density, dynamic viscosity, and electrical conductivity of binary mixtures of ethaline (choline chloride + ethylene glycol at molar ratio 1:2) as a deep eutectic solvent (DES) with dimethyl sulfoxide were measured under atmospheric pressure at temperatures, T, from (308.15 to 363.15) K covering the entire mixture range. The mixtures exhibited negative excess molar volumes, V-E, with a minimum at ethaline mole fractions of x(1) approximate to 0.4...0.5 that became more pronounced with increasing temperature. A similar minimum was found for the excess viscosity, Delta eta, of the mixtures. However, in contrast to V-E the minimum of Delta eta became more shallow with increasing T. As expected, the electrical conductivity of the mixtures increased monotonically with increasing x(1) and T. The temperature dependence of viscosity and conductivity is well described by the Vogel-Fulcher-Tamman (VFT) equation. (C) 2016 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: GLASS-FORMING LIQUIDS; IONIC LIQUIDS; AQUEOUS MIXTURES; REFRACTIVE-INDEXES; ORGANIC-SOLVENTS; 323.15 K; TEMPERATURE; GLYCEROL; PREDICTION; PRESSURE; Deep eutectic solvent; Density; Viscosity; Conductivity; Vogel-Fulcher-Tamman equation
Subjects: 500 Science > 540 Chemistry & allied sciences
Divisions: Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie
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: 14 Dec 2018 12:58
Last Modified: 15 Feb 2019 09:44
URI: https://pred.uni-regensburg.de/id/eprint/116

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