Roman Fercheluc, ClaudiaDelgado Canto, Miguel ÁngelFernández Silva, Samuel DavidGarcía Morales, MoisésRoman Fercheluc, Claudia2026-02-032026-02-032026Roman, C., Delgado, M. A., Fernández-Silva, S. D., & García-Morales, M. (2023). Green oleogels based on elm pulp cellulose nanofibers: effect of the nanofibrillation pre-treatment on their thermo-rheological behavior. In Cellulose. Springer Science and Business Media LLC. https://doi.org/10.1007/s10570-023-05664-0 [Dataset]. AM (Depósito de Investigación de la Universidad de Huelva). https://hdl.handle.net/10272/233100969-02391572-882X (electrónico)https://hdl.handle.net/10272/27857Projects "Smart biolubricants with electro‑responsive capability based on lignocellulosic nanoparticles" (UHU-1255843) and "Advances in the control of friction and wear under the action of an electric field with electro-sensitive and sustainable lubricants" (UHU-202008), funded by Programa Operativo FEDER Andalucia 2014-2020, call 2018 and 2020, respectively. They were led from the University of Huelva, and mainly developed at Center for Research in Chemical Products and Process Technology (Pro2TecS). Main objective: Using vegetable oils and lignocellulosic nanoparticles from residual biomass to produce stable dispersions with tunable electrorheological and tribological properties. Methodology Cellulose nanofibers, both mechanically refined and TEMPO-mediated oxidation chemically treated, were obtained from bleached elm kraft pulps and supplied as aqueous gel suspensions. Oleogels were prepared by transferring these nanofibers into castor oil (1.4 wt.%) via a methanol-mediated solvent-exchange method that displaced water and enabled their dispersion in the oil. The thermo-rheological behavior of the resulting oleogels was characterized through viscous flow and small/large amplitude dynamic shear tests over a range of temperatures and stress conditions to evaluate the influence of the nanofibrillation pre-treatment on shear resistance, temperature sensitivity, and structural recovery. More info: https://doi.org/10.1007/s10570-023-05664-0Sustainable lubricating oleogels were obtained based on elm (Ulmus minor Mill.) pulp cellulose nanofibers in castor oil. Before their nanofibrillation, two samples of the same bleached pulp were subjected to two different pre-treatments, either mechanical PFI (Paper and Fibre Research Institute) refining or chemical TEMPO-mediated oxidation. Their effect on the oleogels’ viscous flow and oscillatory shear behaviors was determined at different temperatures. Very pronounced differences were observed between these oleogels. The oleogel from the chemically-pretreated nanofibers showed evidences of being much more sensitive to both temperature and large shear deformations. Hence, its shear modulus underwent a very remarkable decay of 95.8% when subjected to a non-linear stress value of 100 Pa for 30 min. In turn, under the same conditions, a decay of only 41.4% was observed for the oleogel based on the nanofiber from the mechanically-pretreated nanofibers.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/dataset10.33776/ariasmontano.2785710.1007/s10570-023-05664-0open access33 Ciencias Tecnológicas