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dc.contributor.authorCortes Triviño, Esperanza
dc.contributor.authorCubero Cardoso, Juan
dc.contributor.authorTenorio Alfonso, Adrián 
dc.contributor.authorFernández Recamales, María Ángeles 
dc.contributor.authorValencia Barragán, Concepción 
dc.contributor.authorUrbano Baena, Juan 
dc.contributor.authorFranco Gómez, José María
dc.identifier.citationCortés-Triviño, E., Cubero-Cardoso, J., Tenorio-Alfonso, A., Fernández-Recamales, M. A., Valencia, C., Urbano, J., & Franco, J. M. (2022). Structuring natural deep eutectic solvents with epoxidised lignin-enriched residues: a green alternative to petroleum-based thickened formulations. In Journal of Molecular Liquids (Vol. 360, p. 119433). Elsevier BV.
dc.identifier.issn1873-3166 (electrónico)
dc.description.abstractNatural deep eutectic solvents (NADESs) differing in the number of hydroxyl groups in the hydrogen bond donor (HBD) compound were investigated for usage as a matrix base in reactions involving a lignin-enriched fraction. NADESs were prepared by mixing citric acid with different HBDs (glycerol, xylitol, and sucrose). In addition, waste lignocellulose was epoxidised for use as a thickening agent for NADESs by promoting chemical crosslinking between the HBD hydroxyl groups and the epoxy rings of the lignocellulosic material. Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis were used to verify the reaction between NADES and the epoxidised lignin-rich material. In addition, full rheological characterisation was performed to evaluate the effects of the viscosity of NADESs and lignin-enriched residue concentration. A heating process was applied to determine the influence of water on the viscoelastic properties of the final products. The chemical interaction between NADESs and epoxidised lignocellulose was successfully achieved, resulting in various rheological responses, from liquid-like to gel-like, depending on the HBD compound comprising NADESs and the lignin concentration. The higher the number of hydroxyl groups in the HBD, the higher was the viscosity of the lignin-structured NADESs. An analysis of the relative viscosity data reveals that the epoxidised ligninocellulose residue exerts a similar structuring role in the three different NADESs.es_ES
dc.description.sponsorshipProject RTI2018-096080-BC21 financiado por MCIN/AEI/10.13039/501100011033 y por ‘‘ERDF A way of making Europe”; Project UHU-1257728, financiado por la Universidad de Huelva (Junta de Andalucía 2014-2020).es_ES
dc.relation.isversionofPublisher’s version
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherChemical gel
dc.subject.otherSugarcane bagasse waste
dc.titleStructuring natural deep eutectic solvents with epoxidised ligninenriched residues: a green alternative to petroleum-based thickened formulationses_ES

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