Surface-modification in situ of nano-SiO 2 and its structure and tribological properties

Surface-modification in situ of nano-SiO 2 and its structure and tribological properties The preparation of a series of dispersible nano-SiO 2 by surface-modification in situ was described in this paper. It is found that some silane coupling agents can be combined with nano-SiO 2 by covalent bonds, which change the nanoparticle's surface properties and make nano-SiO 2 disperse well and steadily in many organic mediums. The structure of nanoparticles was characterized by transmission electron microscopy (TEM), infrared spectrum (IR), X-ray photoelectron spectra (XPS) and thermogravimetric analysis (TG). The dispersivity of these nanoparticles in organic solvents was measured by light transmittance. Considering such superior dispersion in oily solvents and very small size, we primarily investigated their tribological behaviors as additive in lubricant on wear testers. The results show that they can evidently increase anti-wear ability and reduce the friction coefficient of lubricant. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Surface-modification in situ of nano-SiO 2 and its structure and tribological properties

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Publisher
Elsevier
Copyright
Copyright © 2005 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2005.09.068
Publisher site
See Article on Publisher Site

Abstract

The preparation of a series of dispersible nano-SiO 2 by surface-modification in situ was described in this paper. It is found that some silane coupling agents can be combined with nano-SiO 2 by covalent bonds, which change the nanoparticle's surface properties and make nano-SiO 2 disperse well and steadily in many organic mediums. The structure of nanoparticles was characterized by transmission electron microscopy (TEM), infrared spectrum (IR), X-ray photoelectron spectra (XPS) and thermogravimetric analysis (TG). The dispersivity of these nanoparticles in organic solvents was measured by light transmittance. Considering such superior dispersion in oily solvents and very small size, we primarily investigated their tribological behaviors as additive in lubricant on wear testers. The results show that they can evidently increase anti-wear ability and reduce the friction coefficient of lubricant.

Journal

Applied Surface ScienceElsevier

Published: Sep 15, 2006

References

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