RT Journal Article
T1 Tribological performance of a paraffinic base oil additive with coated and uncoated SiO2 nanoparticles
A1 Liñeira del Río, José Manuel
A1 García Guimarey, María Jesús
A1 Somoza, Vanesa
A1 Mariño, Fátima
A1 Pérez Comuñas, María José
K1 Friction
K1 Wear
K1 Nanolubricants
K1 Nanoparticle surface modification
AB Electric vehicles (EVs) have emerged as a technology that can replace internal combustion vehicles and reduce greenhouse gas emissions. Therefore, it is necessary to develop novel low-viscosity lubricants that can serve as potential transmission fluids for electric vehicles. Thus, this work analyzes the influence of both SiO2 and SiO2-SA (coated with stearic acid) nanomaterials on the tribological behavior of a paraffinic base oil with an ISO VG viscosity grade of 32 and a 133 viscosity index. A traditional two-step process through ultrasonic agitation was utilized to formulate eight nanolubricants of paraffinic oil + SiO2 and paraffinic base oil + SiO2-SA with nanopowder mass concentrations ranging from 0.15 wt% to 0.60 wt%. Visual control was utilized to investigate the stability of the nanolubricants. An experimental study of different properties (viscosity, viscosity index, density, friction coefficient, and wear) was performed. Friction analyses were carried out in pure sliding contacts at 393.15 K, and a 3D optical profilometer was used to quantify the wear. The friction results showed that, for the SiO2-SA nanolubricants, the friction coefficients were much lower than those obtained with the neat paraffinic base oil. The optimal nanoparticle mass concentration was 0.60 wt% SiO2-SA, with which the friction coefficient decreased by around 43%. Regarding wear, the greatest decreases in width, depth, and area were also found with the addition of 0.60 wt% SiO2-SA; thus, reductions of 21, 22, and 54% were obtained, respectively, compared with the neat paraffinic base oil.
PB MDPI
YR 2024
FD 2024-04-25
LK https://hdl.handle.net/10347/38065
UL https://hdl.handle.net/10347/38065
LA eng
NO Liñeira del Río, J.M.; Guimarey, M.J.G.; Somoza, V.; Mariño, F.; Comuñas, M.J.P. Tribological Performance of a Paraffinic Base Oil Additive with Coated and Uncoated SiO2 Nanoparticles. Materials 2024, 17, 1993. https://doi.org/10.3390/ ma17091993
NO This research is supported by Xunta de Galicia (ED431C 2020/10), by the State Research Agency (AEI) of Spain, and by the European Regional Development Fund (ERDF, FEDER in Spanish) through the PID2020-112846RB-C22 project. J.M.L.d.R. acknowledges the grant of the Margarita Salas program, funded by MCIN/AEI/10.13039/501100011033 and “NextGenerationEU/PRTR”. M.J.G.G. also acknowledges the Xunta de Galicia (Spain) for the postdoctoral fellowship (reference ED481D 2023/016).
DS Minerva
RD 28 abr 2026