Synergistic Effects of Functionalized WS2 and SiO2 Nanoparticles and a Phosphonium Ionic Liquid as Hybrid Additives of Low-Viscosity Lubricants

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Liñeira del Río, M (Author) Other; Carlos M C G Fernandes (Author) FEUP; Gonçalves, EP (Author) Other; Seabra, HO (Author) Other

Journal

Title: Lubricants

Vol. 12

Final page: 58

Publisher: MDPI

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-010-5CV

DOI: 10.3390/lubricants12020058

Abstract (EN): This research shows the antifriction and antiwear synergies between a phosphonium ionic liquid (IL) and f-WS2 and f-SiO2 nanoparticles (NPs) as additives of a base oil with low viscosity (PAO6). Mass concentrations of 0.1 wt% nanoadditives and 1% IL were selected to formulate the nanolubricants. Pure sliding and rolling-sliding friction tests were performed at 120 degrees C, finding great friction reductions in comparison with the PAO6 base oil, specifically for the double hybrid nanolubricant (PAO6 + 1 wt% IL + 0.1 wt% f-WS2 + 0.1 wt% f-SiO2). Regarding the wear produced, the greatest antiwear behavior was also achieved for the double hybrid nanolubricant (width reduction of 48% and worn area decrease of 84%). Furthermore, by means of Raman microscopy and roughness examination of the worn surfaces, it can be proposed that the lubrication mechanism of doubled hybrid nanolubricants could be supported by the adsorbed tribofilm (IL and f-WS2) as well as the mending effects (f-WS2 and f-SiO2).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16