RT Journal Article
T1 Impact of the Morphology of Electrospun Lignin/Ethylcellulose Nanostructures on Their Capacity to Thicken Castor Oil
A1 Borrego Algarra, María
A1 Martín Alfonso, José Enrique
A1 Valencia Barragán, Concepción
A1 Sánchez Carrillo, María Carmen
A1 Franco Gómez, José María
AB This study reports on a novel strategy for manufacturing thickened gel-like castor oilformulations by dispersing electrospun lignin/ethylcellulose nanostructures. These thickened formulations were rheologically and tribologically evaluated with the aim of being proposed as alternativeecofriendly lubricating greases. Low-sulfonate kraft lignin (LSL) and ethylcellulose (EC) were dissolved in a DMAc:THF mixture at different concentrations (8, 10, and 15 wt.%) and LSL:EC ratios(50:50, 70:30, and 90:10) and subjected to electrospinning. The resulting electrospun nanostructureswere morphologically characterized. EC acting as the cospinning polymer improved both LSLspinnability and the oil structuring ability. Solutions with a high lignin content achieved microsizedparticles connected by fibrils, whereas solutions with a high EC content (50:50 ratio) and LSL/EC totalconcentration (10 and 15 wt.%) yielded beaded or bead-free nanofibers, due to enhanced extensionalviscoelastic properties and nonNewtonian characteristics. The gel-like properties of electrospunnanostructure dispersions in castor oil were strengthened with the nanostructure concentration andthe EC:LSL ratio, as a result of the formation of a more interconnected fiber network. The oleodispersions studied exhibited a satisfactory frictional response in a tribological contact, with frictioncoefficient values that were comparable to those achieved with traditional lithium-lubricating greases
PB MDPI
SN 2073-4360 (electrónico)
YR 2022
FD 2022-11
LK https://hdl.handle.net/10272/21374
UL https://hdl.handle.net/10272/21374
LA eng
NO Borrego, M., Martín-Alfonso, J. E., Valencia, C., Sánchez, M. C., & Franco, J. M. (2022). Impact of the Morphology of Electrospun Lignin/Ethylcellulose Nanostructures on Their Capacity to Thicken Castor Oil. In Polymers (Vol. 14, Issue 21, p. 4741). MDPI AG. https://doi.org/10.3390/polym14214741
NO : This work was supported by MCIN/AEI/10.13039/501100011033, by “ERDF—A way ofmaking Europe” (grant number: RTI2018-096080-BC21) and by Junta de Andalucía/EPIT2020-UHU(grant numbers: PY20_00751 and UHU202029) by the FEDER European Programme
DS Repositorio Institucional de la Universidad de Huelva
RD 2 jun 2026