Synthesis and exploration of the lubricating behavior of nanoparticulated Mo15S19 in linseed oil

Fernández-Coppel, Ignacio A. ; Martín-Ramos, Pablo (Universidad de Zaragoza) ; Martín-Gil, Jesús ; Pamies, Ramón ; Avella, Manuel ; Avilés, María Dolores

Resumen: Molybdenum chalcogenides present interesting properties beyond their superconducting critical temperatures and upper critical magnetic fields, making them suitable for potential applications in tribology, batteries, catalysis, or thermopower. In this study, Mo15S19 nanoparticles with an average diameter of 10 nm were synthesized via the reaction of ammonium molybdate with hydrochloric acid and elemental sulfur as reducers at 245 °C. The oxidation to MoO3 in air was efficiently avoided by using linseed oil as a reaction medium and dispersant. Scanning electron microscopy (SEM) micrographs of the as-prepared samples revealed the presence of few-micron-size aggregates, while transmission electron microscopy (TEM) characterization evidenced that the samples were polynanocrystalline with a high degree of homogeneity in size (standard deviation of 2.7 nm). The absence of the first-order (00l) reflection in the X-ray diffraction pattern was also indicative of the absence of Mo3S4 stacking, suggesting that it was a non-layered material. A dispersion of the nanoparticles in linseed oil has been studied as a lubricant of steel–steel sliding contacts, showing the formation of a surface layer that reduces wear and mean friction coefficients with respect to the base oil.

Idioma: Inglés

DOI: 10.3390/ma11091783

Año: 2018

Publicado en: Materials 11, 9 (2018), 1783 [13 pp.]
ISSN: 1996-1944

Factor impacto JCR: 2.972 (2018)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 102 / 293 = 0.348 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.686 - Materials Science (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/BES-2015-074836
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-55384-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012017-85130-P

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Area Ingeniería Agroforestal (Dpto. CC.Agrar.y Medio Natural)