@article{10272/24675,
year = {2024},
month = {11},
url = {https://hdl.handle.net/10272/24675},
abstract = {Cellulose acetate/silica (CA/SIL) nanocomposites are prepared by electrospinning and investigated as multifunctional ingredients in eco-friendly semisolid lubricant formulations. The structuring ability of these electrospun composites in castor oil and the
antifriction and antiwear properties are examined through rheological and tribological experiments. The multifunctionality of
CA/SIL composites arises from a balance between the silica content and the formation of nanofiber-dominated structures. The
linear viscoelasticity functions in the oleo-dispersions increase by several orders of magnitude with both the spinning solution
concentration and the CA:SIL ratio. However, the rheological response primarily depends on the morphology of the nanofiber
mat obtained, specifically nanofiber diameter and the presence of beads. In contrast, the silica content significantly impacts the
tribological performance of the oleo-dispersions regardless of nanofiber morphology. For similar nanoarchitectures and rheological responses, the friction coefficient is reduced from 0.227 to 0.108 by incorporating silica in a 10:1 CA:SIL ratio, compared with
the SIL-free electrospun CA nanofibers, while wear is completely prevented. Increasing the composite concentration from 5 to
12.5wt. % enhances wear protection and the gel strength of oleo-dispersions, for example, the plateau modulus rises from 800 to
42,000Pa using a composite with a 10:1 CA:SIL ratio},
organization = {This work was supported by Ministerio de Ciencia, Innovación y Universidades and ERDF/EU (PID2021-125637OB-I00).
This work is part of the Research Project PID2021-125637OB-I00,
funded by MICIU/AEI/10.13039/501100011033 and by ERDF/EU.
Funding is gratefully acknowledged. Open Access funding provided
by Universidad de Huelva/CBUA thanks to the CRUE-CSIC agreement
with Wiley},
publisher = {Wiley},
title = {Use of Electrospun Cellulose Acetate/Silica Composites as Multifunctional Ingredients in Eco-Friendly Semisolid Lubricant Formulations},
doi = {10.1002/app.56489},
author = {Toro Gallego, Manuel and Valencia Barragán, Concepción and Sánchez Carrillo, María Carmen and Martín Alfonso, José Enrique and Franco Gómez, José María},
}