RT Journal Article
T1 Optimization of a Solvent Exchange Method Enabling the Use of Dehydrated Cellulose Nanofibers as the Thickener in Lubricating Oleogels
A1 García Pérez, María
A1 Roman Fercheluc, Claudia
A1 Fernández Silva, Samuel David
A1 Delgado Canto, Miguel Ángel
A1 García Morales, Moisés
A1 Roman Fercheluc, Claudia
AB A method that enabled the formulation of lubricating oleogels using dried cellulose nanofibers (CNFs) as an eco-friendly thickener in castor oil was studied. In their dehydrated state, strong hydrogen bonding between nanofibers and high hydrophilicity are the main obstacles to their dispersion in oil. Hence, clusters of dried CNFs had to be previously detached by their dispersion in water. The resulting hydrogels were then subjected to methanol washes to displace the water from the nanofibers. After centrifugation, the methanol-wetted precipitate was readily dispersed in castoroil, forming an oleogel once the methanol was removed. Optimization was conducted in terms ofthe following variables: (a) hydrogel processing method; (b) hydrogel pH; (c) methanol/hydrogelratio; (d) number of washes; and (e) oleogel CNF concentration. Their effect on the oleogel linearviscoelastic behavior was analyzed. In general, they demonstrated a prevailing elastic behaviordenoted by a well-developed plateau region. The CNF concentration was found to have a moreremarkable impact on the oleogels’ rheological behavior than any other variable studied. Hence,substantial differences were observed between 1 and 2 wt.%. The CNFs exhibited a very remarkable thickening capacity in castor oil, achieving a plateau modulus of ca. 700 Pa with just 2 wt.%. Moreover, the resulting oleogels maintained a uniform texture even after one year of storage. This indicates that the oleogels were both homogeneous and storage stable, effectively overcoming the stability issues associated with direct dispersion of dried CNFs in castor oil.
PB MDPI
SN 2310-2861 (electrónico)
YR 2024
FD 2024-10-22
LK https://hdl.handle.net/10272/24430
UL https://hdl.handle.net/10272/24430
LA eng
NO García-Pérez, M.; Roman, C.; Fernández-Silva, S.D.; Delgado, M.A.; García-Morales, M. Optimization of a Solvent Exchange Method Enabling the Use of Dehydrated Cellulose Nanofibers as the Thickener in Lubricating Oleogels. Gels 2024, 10, 690. https://doi.org/10.3390/ gels10110690
NO ThisresearchwasfundedbyProgramaOperativoFEDER-Andalucía2021-27,Applied Research(call2023),grantnumberEPIT1312023”andProyectosdeGeneracióndeConocimiento 2023(GobiernodeEspaña),grantnumberPID2023-151761NB-I00.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026