RT Journal Article
T1 Effect of the addition of coated SiO2 nanoparticles on the tribological behavior of a low-viscosity polyalphaolefin base oil
A1 Mariño, Fátima
A1 Liñeira del Río, José Manuel
A1 Gonçalves, David E.P.
A1 Seabra, Jorge H.O.
A1 López Iglesias, Enriqueta
A1 Fernández Pérez, Josefa
K1 Low-viscosity oil
K1 Nanoadditives
K1 Anti-wear additives
K1 Surface modification of NPs
K1 Electric vehicles
K1 Automatic transmission fluids
AB This work reports tribological properties of PAO6 containing SiO2 nanoparticles modified with stearic-acid (SiO2-SA) as additives at concentrations (0.05, 0.10, 0.20, 0.30) wt% and the same concentration of SA as a dispersant. Tribological experiments were performed at 120 °C in pure sliding and rolling-sliding conditions (5% slide-to-roll ratio). All nanolubricants have better anti-friction capabilities than PAO6. The optimum concentration for friction reduction was 0.30 wt% for both tribological conditions. The best anti-wear results for the specimens tested in pure sliding conditions were achieved with PAO6 + 0.20 wt% SiO2-SA with reductions of 55%, 86% and 92%, in wear track width, wear track depth and wear area, respectively. Tribological mechanisms of the nanoparticles have been analyzed through roughness measurements, concluding that polishing, tribofilm and adsorption of the additives occur
PB Elsevier
SN 0043-1648
YR 2023
FD 2023-06-22
LK http://hdl.handle.net/10347/31278
UL http://hdl.handle.net/10347/31278
LA eng
NO Wear 530–531 (2023) 205025
NO This research is supported by Xunta de Galicia (ED431C 2020/10), by MCIN/AEI/10.13039/501100011033 through the PID2020-112846RB-C22 project and by LAETA, Portugal, under project UID/50022/2020. JMLdR is grateful for financial support through the Margarita Salas program, funded by MCIN/AEI/10.13039/501100011033 and “NextGenerationEU/PRTR”. FM acknowledges a IACOBUS grant to the European Grouping for Territorial Cooperation Galicia-North of Portugal (GNP-EGTC). Furthermore, authors are also grateful to Repsol Lubricants for providing the PAO6 base oil and to RIAIDT-USC for its analytical facilities
DS Minerva
RD 4 may 2026