Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 98, Issue 1, Pages 183-189Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2005.09.043
Keywords
nanoparticles; oil additive; capping; tribology
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Oleic acid (OA) capped PbS nanoparticles were chemically synthesized and characterized by means of Fourier transform-infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray electron diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The triboligical properties of the capped PbS nanoparticles as additive in liquid paraffin was investigated using a four-ball machine. The lubricating mechanisms were discussed along with the analyses results of XPS and scanning electron microscope (SEM). Results show that OA-capped PbS nanoparticles, with an average diameter of about 8 nm, are able to prevent water adsorption, oxidation and are capable of being dispersed stably in organic solvents or mineral oil. OA-capped PbS nanoparticles as an additive in liquid paraffin perform good antiwear and friction-reduction properties owing to the formation of a boundary film. (c) 2005 Elsevier B.V. All rights reserved.
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