RT Journal Article
T1 Thickening Castor Oil with a Lignin-Enriched Fraction from Sugarcane Bagasse Waste via Epoxidation: A Rheological and Hydrodynamic Approach
A1 Cortés Triviño, Esperanza
A1 Valencia Barragán, Concepción
A1 Franco Gómez, José María
AB Thickening vegetable oils to different extents is ofgreat interest in the design and development of new bio-basedlubricant formulations, as achieving a wide range of rheologicalproperties is crucial to the successful replacement of petroleumbasedtraditional counterparts. With this aim, the influence ofepoxidation degree, modified by altering the reaction conditions,on the viscous flow properties of epoxidized castor oil wasinvestigated together with the incorporation of a lignin-enrichedfraction from sugarcane bagasse waste to more extensively modifythe rheological properties, thereby valorizing this waste fraction.Oil thickening was achieved by promoting the cross-linkingbetween the epoxidized oil and the lignin-enriched fraction thatenables the compatibilization of both components. Castor oilepoxidation was assessed by means of standard volumetric titration methods and infrared spectroscopy. In addition, a fullyrheological characterization of both epoxidized and lignin-thickened castor oils was carried out. A hydrodynamic approach was alsofollowed, aiming to provide an estimation of the Mark−Houwink−Sakurada parameters and relate the intrinsic viscosity with theaverage molecular weight of the resulting epoxidized castor oil/lignocellulose macromolecular compounds. The chemical interactionbetween castor oil and the lignocellulosic material increased as the extent of epoxidation was increased, yielding a variety ofrheological responses from Newtonian liquids of increasing viscosities (from around 1 to 500 Pa·s) to viscoelastic liquids.
PB American Chemical Society
SN 2168-0485 (electrónico)
YR 2021
FD 2021-07-23
LK http://hdl.handle.net/10272/20265
UL http://hdl.handle.net/10272/20265
LA eng
NO Cortés-Triviño, E., Valencia, C., & Franco, J. M. (2021). Thickening Castor Oil with a Lignin-Enriched Fraction from Sugarcane Bagasse Waste via Epoxidation: A Rheological and Hydrodynamic Approach. In ACS Sustainable Chemistry & Engineering (Vol. 9, Issue 31, pp. 10503–10512). American Chemical Society (ACS). https://doi.org/10.1021/acssuschemeng.1c02166
NO Funding for open access charge: Universidad de Huelva / CBUAThis work is part of a research project (RTI2018-096080-B-C21) sponsored by the MICINN-FEDER I+D+i SpanishProgramme. The financial support is gratefully acknowledged.The authors are also grateful to Dr. Ignacio Ballesteros (CIEMATMadrid, Spain) for kindly providing the ligninenriched waste fraction used in this study.
DS Repositorio Institucional de la Universidad de Huelva
RD 2 jun 2026