Oleogels and reverse emulsions stabilized by acetylated Kraft lignins
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-07-01
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Language
en
Pages
10
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International Journal of Biological Macromolecules, Volume 242
Abstract
Acetylated Kraft lignins were evaluated for their ability of structuring vegetable oils into oleogels. Microwave-assisted acetylation was used to adjust lignin's degree of substitution according to reaction temperature (130 to 160 °C), and its effect in improving the viscoelasticity of the oleogels, which was related to the hydroxyl group content. The results were compared with those obtained by Kraft lignins acetylated using conventional methods at room temperature. A higher microwave temperature resulted in gel-like oil dispersions with improved viscoelastic properties, and stronger shear-thinning character, along with enhanced long-term stability. Lignin nanoparticles structured castor oil by enhancing hydrogen bonding between the hydroxyl groups of the oil and the nanoparticles. The oil structuring capacity of the modified lignins enhanced the stability of water-in-oil Pickering emulsions that resulted from low-energy mixing.Description
Funding Information: This work is part of the research project ( PID2021-125637OB-I00 ) funded by MCIN/AEI /10.13039/501100011033 and by “ERDF A way of making Europe” (EU) and the project Grasas lubricantes basadas en materiales lignocelulósicos y aceites residuales y/o vegetales (ReGrease), funded by Cátedra Fundación CEPSA . A.M.B-L. received a PhD Research Grant from the Ministerio de Educación, Cultura y Deporte ( FPU16/03697 ). The collaboration with the University of Aalto has been possible thanks to the grants EST17/00875 and EST18/00577 from the Ministerio de Educación y Formación Profesional . Funding for open access charge: Universidad de Huelva / CBUA. The financial support is gratefully acknowledged. Publisher Copyright: © 2023 The Authors
Keywords
Lignin nanoparticles, Microwave-assisted acetylation, Oil structuring, Pickering emulsions, Rheology
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Citation
Borrero-López, A M, Wang, L, Li, H, Lourençon, T V, Valencia, C, Franco, J M & Rojas, O J 2023, ' Oleogels and reverse emulsions stabilized by acetylated Kraft lignins ', International Journal of Biological Macromolecules, vol. 242, 124941 . https://doi.org/10.1016/j.ijbiomac.2023.124941