2026-05-08T22:04:42Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/114372026-02-27T01:05:46Zcom_10259_4323com_10259_5086com_10259_2604col_10259_4330

Alcalde García, Rafael T. 14 600 0000-0002-5611-220X Huerta Sainz, Sergio de la 845 600 0000-0002-6843-1419 Diez Cabanes, Valentin de6f08a3-922f-4441-b35a-ae2da8240e5c Escobedo Monge, María Antonieta 20eb83ad-5b66-4ddb-867c-f559b00ebda7 600 Trenzado, José Luis a166b4b5-ac85-42a7-b12b-668e3124c476 600 Atilhan, Mert 51023856-6e72-4667-b27a-fe52e5115d61 600 Bol Arreba, Alfredo 70 600 0000-0003-4641-4826 Aparicio Martínez, Santiago 30 600 0000-0001-9996-2426 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. This research was funded by European Union (Horizon 2020 program, project WORLD: H2020-MSCA-RISE-2019-WORLD-GA-873005), and Agencia Estatal de Investigación (Project NADESforPFAS: PID2022-142405OB-I00). application/pdf eng Elsevier Journal of Molecular Liquids. 2025, V. 437, Part A, 128412 https://doi.org/10.1016/j.molliq.2025.128412 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Deep eutectic solvents Thermophysical properties Choline chloride Hydration effects Bio-based hydrogen bond donors Química física Disolventes Chemistry, Physical and theoretical Solvents 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 info:eu-repo/semantics/publishedVersion Journal of Molecular Liquids 437 128412 THUMBNAIL Alcalde-jml_2025.pdf.jpg Alcalde-jml_2025.pdf.jpg IM Thumbnail image/jpeg 4947 https://riubu.ubu.es/bitstream/10259/11437/4/Alcalde-jml_2025.pdf.jpg efe36bb5d0aad722fe133213def097a6 MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 998 https://riubu.ubu.es/bitstream/10259/11437/3/license.txt aa90105e1c90a1b4fe810649aa967b7d MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 908 https://riubu.ubu.es/bitstream/10259/11437/2/license_rdf 0175ea4a2d4caec4bbcc37e300941108 MD5 2 ORIGINAL Alcalde-jml_2025.pdf Alcalde-jml_2025.pdf application/pdf 1808628 https://riubu.ubu.es/bitstream/10259/11437/1/Alcalde-jml_2025.pdf 82a1fd68a5512d54ca13cc8c51af5293 MD5 1 10259/11437 oai:riubu.ubu.es:10259/11437 2026-02-27 02:05:46.313 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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