2026-05-08T22:53:12Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/114372026-02-27T01:05:46Zcom_10259_4323com_10259_5086com_10259_2604col_10259_4330
Repositorio Institucional de la Universidad de Burgos
author
Alcalde García, Rafael T.
author
Huerta Sainz, Sergio de la
author
Diez Cabanes, Valentin
author
Escobedo Monge, María Antonieta
author
Trenzado, José Luis
author
Atilhan, Mert
author
Bol Arreba, Alfredo
author
Aparicio Martínez, Santiago
2026-02-26T07:48:08Z
2026-02-26T07:48:08Z
2025-11
0167-7322
https://hdl.handle.net/10259/11437
10.1016/j.molliq.2025.128412
This study presents a comprehensive thermophysical characterization of hydrated deep eutectic solvents (DESs) composed of choline chloride (ChCl) and four hydrogen bond donors (HBDs): citric acid, malic acid, fructose, and ethylene glycol in equimolar ratios. By introducing 2, 10, and 22 wt% water—spanning key hydration regimes where DESs structure is progressively altered—we systematically quantify the effects of hydration on density, viscosity, electrical conductivity, thermal conductivity, and refractive index over a wide temperature range. Results demonstrate that water addition leads to a dramatic reduction in viscosity, particularly for bio-derived HBDs, enhancing processability and enabling practical applications. The ChCl:citric acid DESs maintains high structural cohesion upon hydration, reflected in persistent cooperative dynamics and high activation energy, whereas the synthetic ethylene glycol system exhibits predictable, tunable behavior, ideal for engineered fluid systems. Electrical conductivity increases non-linearly with water content, accompanied by a transition from fragile to strong liquid behavior. Derived parameters—molecular volume, thermal expansion coefficient, and excess molar volumes—reveal non-ideal mixing behavior and structural reorganization. Our findings define structure–property correlations critical for optimizing DESs formulations, offering a foundation for application-specific solvent engineering in energy, electrochemistry, and separation technologies.
eng
Atribución 4.0 Internacional
Deep eutectic solvents
Thermophysical properties
Choline chloride
Hydration effects
Bio-based hydrogen bond donors
Beyond the blend: Unveiling the thermophysical fingerprints of hydrated choline chloride deep eutectic systems with bio-derived and synthetic hydrogen bond donors
info:eu-repo/semantics/article
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URL
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Alcalde-jml_2025.pdf