Roman Fercheluc, ClaudiaDelgado Canto, Miguel ÁngelFernández Silva, Samuel DavidGarcía Morales, MoisésRoman Fercheluc, Claudia2026-02-032026-02-032026Claudia Roman, Miguel A. Delgado, Samuel D. Fernández-Silva, Moisés García-Morales, Exploring the effect of the pulp bleaching on the thermo-rheological behavior of sustainable cellulose nanofiber-based oleogels, Journal of Environmental Chemical Engineering, Volume 10, Issue 6, 2022, 108617, ISSN 2213-3437, https://doi.org/10.1016/j.jece.2022.108617. [Dataset] AM (Depósito de Investigación de la Universidad de Huelva). https://hdl.handle.net/10272/211842213-3437 (electrónico)https://hdl.handle.net/10272/27858Project "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 electrosensitive and sustainable lubricants" (UHU-202008), funded by Programa Operativo FEDER Andalucia 2014-2020, call 2018 and 2020, respectively. It was led from the University of Huelva, and mainly developed at Center for Research in Chemical Products and Process Technology (Pro2TecS). Main objectives: Using vegetable oils and lignocellulosic nanoparticles from residual biomass to produce stable dispersions with tunable electrorheological and tribological properties. Methodology Cellulose nanofibers were obtained from bleached and unbleached elm kraft pulps and supplied as aqueous gel suspensions. Oleogels were prepared by transferring these nanofibers into castor oil (1.4 wt.%) via a methanolmediated solvent-exchange method that displaced water and enabled their dispersion in the oil. The thermorheological 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 pulp bleaching on shear resistance, temperature sensitivity, and structural recovery. More info: https://doi.org/10.1016/j.jece.2022.108617Taking advantage of the high thickening capacity of cellulose nanofibers in castor oil, sustainable lubricating oleogels were obtained. Methanol was used as mediator to transfer the nanofibers, originally present as a hydrogel, into the vegetable oil. The effect of the pulp bleaching on the oleogels’ thermo-rheological behavior was analyzed. Viscous flow curves and small/large amplitude dynamic shear tests were carried out on both bleached and unbleached samples of the same elm kraft pulp. Substantial differences were observed, above all when the oleogels were subjected to stress values beyond the onset of their linear viscoelastic regimes. The oleogel prepared with nanofibers from the unbleached pulp was found to endure large shear deformations better than that from the bleached pulp, and was less sensitive to temperature. Hence, the complex shear modulus (|G*|) corresponding to the oleogel based on 1.4 wt% bleached nanofiber decreased by 55.7% upon a non-linear stress of 200 Pa was applied for 30 min. However, a less severe structural breakdown, i.e., a decay in |G* | of 28.9% (half of the previous one), was monitored when the oleogel based on the unbleached nanofiber was submitted to the same testing conditions. It should also be underlined that such an oleogel showed an extraordinary capacity to recovery its structure after the large shear deformation process.engCellulose nanofibersBleachingCastor oilSustainabilityRheologyLubricantsdataset10.33776/ariasmontano.2785810.1016/j.jece.2022.108617open access33 Ciencias Tecnológicas