8/30/10
Oil-soluble nano copper alloy for lubricants
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Lubrication is the technique employed to reduce wear and tear of one or both of rotating/sliding surfaces in close contact and moving relative to each another, by interposing lubricant between the surfaces. The lubricant film can be a solid, a solid/liquid dispersion, a liquid, a liquid-liquid dispersion or exceptionally a gas. There is inevitable loss of energy due to friction. With conventional lubricants the loss is more, but by mixing nano additives friction and wear can be considerably reduced. Oil-soluble nano copper or copper- silica alloy is one such additive.This multifunction additive to lubricants integrate metal, ceramic and organic nano-materials that activate special self-repairing and anti-wear protection in varying working environments. The copper additive has cu=15%, average size less than20nm, viscosity index:0.8-1.2 Pa.s, other metal content: Ni,Sn,Zn=1.4%. The in-situ surface-modified oil-soluble Cu nanoparticles and SiO2 nanoparticles are readily dispersive in many kinds of lubricating oils and as additives reduce friction and improve anti wear properties of base stocks. They have excellent synergism at a ratio of 0.30wt% nano-Cu to 0.25wt% nano-SiO2 to form a chemical reaction boundary film consisting of metallic alloy and S- and P-containing inorganic and organic compounds. The additive repairs surfaces and reduce friction, improve energy efficiency, boost power output, reduce carbon deposit and discharge, reduce vibration and noise and extend the service life of engines and machinery.
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