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In recent years with the rapid development of nanotechnology and micro -depth study of tribology , nano-materials in the field of tribology has demonstrated broad application prospects . Compared with the conventional additives , antiwear agents , such as sulfur, chlorine, phosphorus and other elements , nano-materials having a size smaller, than the large surface area , and other characteristics , as additives added to the lubricating oil not only can significantly improve the lubrication performance of the lubricating oil , and environmental protection of ecological non-toxic. Therefore, the research and development of high-performance nano lubrication additives has important strategic significance . Preparation of nano - copper , paper, liquid-phase reduction precipitation method as raw material , copper sulfate , hypophosphite as a reducing agent for the reduction reaction , focusing on the concentration of ethylene diamine tetra-acetic acid (EDTA) and copper sulfate ratio and the pH value of the product , the optimum conditions for preparation of nano- copper . And using the X - ray diffraction (XRD) and transmission electron microscopy (TEM) of the sample composition , morphology and particle size was analyzed, the results show that : the product of the test preparation of a single quality the nanoscale copper powder, spherical, average particle diameter of 2.8nm. Wear test machine to study the tribological properties of nano copper in oil-based lubricants , friction coefficient and wear these two indicators were investigated on the wear and tear of the sample surface SEM morphology analysis . The study results show that : nanometer copper through the self- repair mechanism can significantly improve the anti-wear oil-based lubricants reducing friction . When the nano-copper mass fraction of 0.04 % and 0.03% , the coefficient of friction and the wear amount respectively reaches the optimum value . The water -based lubricant in our laboratory made ??products, mainly by water , starch , and sodium hydroxide was prepared , under certain conditions , the wear testing machine through the investigation of these two indicators of Mount scar width and the amount of wear tribological properties of nano copper in the water-based lubricant on the worn surface of the specimen SEM morphology analysis . The study results show that : the nano copper can improve the water -based lubricant antiwear less friction, wear width and wear volume reaches a minimum when the nanometer copper mass fraction of 0.04 ‰ .
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