Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 128, Issue -, Pages 164-172Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2018.07.031
Keywords
Glyceline; NADES; Thermophysical properties
Categories
Funding
- Diputacion General de Aragon, Fondo de Desarrollo Regional Construyendo Europa desde Aragon [E31_17R]
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In this paper, two Natural Deep Eutectic Solvents, glyceline (Gly) and glyceline-water (GlyW), containing choline chloride as acceptor H-bond compound and glycerol as donor H-bond group are studied. For glyceline the mole relation is 1 (choline chloride): 2 (glycerol) and for glyceline-water the mole relation is 1 (choline chloride): 1.99 (glycerol): 1.02 water. The ternary NADES has been synthetized and characterized chemically by NMR techniques for this work. Several thermophysical properties in a wide range of temperature (278.15-338.15) K and at atmospheric pressure (0.1 MPa) have been measured for both compounds: density, rho, speed of sound, u, refractive index, n(D), surface tension, sigma, isobaric molar heat capacity, C-p,C-m, kinematic viscosity, nu, and electric conductivity, kappa. Furthermore, some related properties have been also calculated: isobaric expansibility, alpha(p), isentropic compressibility, kappa(S), molar refraction, R-m, entropy and enthalpy of surface formationper unit surface area (Delta S-s and Delta H-s), and dynamic viscosity, eta, and viscous flow and electrical conductivity activation energies. The results have been discussed in terms of the effect of temperature and the inclusion of water. We conclude that the compound containing water into the structure has a higher molar volume and a higher fluidity. The binary NADES (Gly) is a more structured liquid than ternary one (GlyW). (C) 2018 Elsevier Ltd.
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