RT Journal Article
T1 Oleo-Dispersions of Electrospun Cellulose Acetate Butyrate Nanostructures: Toward Renewable Semisolid Lubricants
A1 Martín Alfonso, Manuel Antonio
A1 Rubio Valle, José Fernando
A1 Martín Alfonso, José Enrique
A1 Franco Gómez, José María
AB In this work, the electrospinnability of cellulose acetate butyrate (CAb) solutions, and the ability of the resulting micro- and nano-architectures to structure castor oil are studied aiming to develop eco-friendly lubricating greases. Particles, beaded-fibers, defect-free fibers, and porous nanostructures are successfully prepared by dissolving CAb in N,N-dimethylacetamide/acetone (DMAc:Ac, 1:2 w/w) and methylene chloride/acetone (DM:Ac, 1:1 w/w) solvent mixtures at different concentrations (2.5–15 wt.%). The formation of bead-free nanofibers is favored at concentration above 10 wt.%, when solutions achieve relaxation times of ≈50 ms and shear-thinning in extensional and shear flow tests,respectively. Non-porous and porous CAb nanostructures are successfully used as castor oil thickeners at concentrations of 3–5 wt.%, leading a wide variety of rheological responses which mimic those of traditional semisolid lubricants. The surface properties of the nanofibers have a ignificant impact on the wear and friction performance in metal–metal contact, which has beenassociated with the oil release ability of the generated 3D network. Oleo-dispersions prepared with smooth fibers show tribological performance comparable to, or even better than, commercial lithium greases. Overall, this study reveals the potential of CAb electrospun nanostructures for thedevelopment of next-generation renewable semisolid lubricant formulations.
PB Wiley
SN 2366-7486 (electrónico)
YR 2024
FD 2024
LK https://hdl.handle.net/10272/23073
UL https://hdl.handle.net/10272/23073
LA eng
NO Martín‐Alfonso, M. A., Rubio‐Valle, J. F., Martín‐Alfonso, J. E., & Franco, J. M. (2024). Oleo‐Dispersions of Electrospun Cellulose Acetate Butyrate Nanostructures: Toward Renewable Semisolid Lubricants. In Advanced Sustainable Systems. Wiley. https://doi.org/10.1002/adsu.202300592
NO This work is part of different research projects funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe” (grant PID2021-125637OB-I00) and by FEDER/Junta de Andalucía Programmes (grants PY20_00751 and UHU202029). J.F.R.-V. has also received a Ph.D. Research Grant PRE2019-090632 from Ministerio de Ciencia e Innovación (Spain). Funding for open access charge: Universidad de Huelva/CBUA. Authors gratefully acknowledge the financial support.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026