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Synthesis and Tribological Behavior of Oil-Soluble Cu Nanoparticles as Additive in SF15W/40 Lubricating Oil
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National Natural Science Foundation of China (50575097); China Postdoctoral Science Foundation (20090461074)); Jiangsu Postdoctoral Science Foundation (0902007C); Start-up Foundation of Jiangsu University (08JDG049)

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    Abstract:

    Oil-soluble Cu nanoparticles were prepared by an oil-water interface growth method, using ascorbic acid as a reductant, polyethylene glycol (PEG-2000) as a modifier, and 1-butanol as growth agent. The particle size distribution of the obtained nanoparticles was between 18.2-80.2 nm, and the average size was 44.7 nm. The microstructures of these nanoparticles were characterized by XRD, TEM and high-concentration laser granularity scatter analyzer. The XRD patterns indicate that the lattice parameters of these Cu nanoparticles are enlarged by about 1.478%. The anti-wear and friction performance of SF15W/40 lubricating oil with these Cu nanoparticles were measured by ball-on-disk UMT-Ⅱ tribometer. It is found that the oil-soluble Cu nanoparticles have wetting effect and can be kept in dispersing form for long-term in SF15W/40 lubricating oil; the tribological performance of SF15W/40 lubricating oil with nano-Cu is improved. The best additive content of oil-soluble nano-Cu in SF15W/40 is 0.8% (mass fraction), and in such case the friction coefficient and wear loss are the lowest

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[Pan Qiuhong, Zhang Xifeng. Synthesis and Tribological Behavior of Oil-Soluble Cu Nanoparticles as Additive in SF15W/40 Lubricating Oil[J]. Rare Metal Materials and Engineering,2010,39(10):1711~1714.]
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  • Received:October 11,2009
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