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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

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

Revista

Título: Lubricants

Vol. 12

Página Final: 58

Editora: MDPI

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: 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).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16