Study On The Application Of Nano-copper Lubricating Oil Additive

The rapid development of the automotive industry has not only led to a significant increase in the amount of automotive lubricants,but also puts higher demands on quality and grade of lubricants.At the same time,with the continuous increase of vehicles,more serious pollution caused by exhaust emissions from motor vehicles has also received increasing attention.In response to the contribution of motor vehicle exhaust as a source of haze,the environmental protection department is also constantly formulating and implementing a more stringent motor vehicle emission bill.As the special effects of nanoparticles have been further studied,the application of nanoparticles in catalysis,lubrication,and other fields has also received attention.In this paper,the high-concentration nano-copper suspension prepared by the existing patents was used to modify the surface of nano-copper particles,and then used as a lubricant additive in Shell HX-6 lubricant,and the friction and catalytic properties were studied.The main contents of the present research are as follows:(1)The nano-copper particles are surface-modified by the combination of two common non-ionic surfactants,and the suspension dispersion of copper nanoparticles in lubricating oil is determined by UV-Vis spectrophotometry;At the same time,the tribological properties of nano-copper lubricating oil are studied by using the friction and wear tester and the simplified lifting Mken tester.The experimental results show that the dispersion stability of nano-copper particles in HX-6 engine oil is best when the non-ionic surfactants Tween 80 and Span 80 are compounded in a ratio of 1:1.When the nano-copper suspension is added in an amount of 0.4%relative to the lubricating oil,the antifriction and anti wear properties of the oil could be effectively improved,the friction coefficient is reduced by about 11.5%,and the extreme pressure performance was increased by 1.4 times.(2)TG-MS combined technology is used to study the thermal analysis experiments of nano-copper particles on the absorption of sulfide and catalytic soot particles.The results show that nano copper particles are formed CuSO4 with SO2 in the temperature below 560?;the maximum thermal weight loss rate of soot particles catalyzed by nano copper oxide decreases from 580? to 520?.And the activation energy of soot particles burning is reduced from 127.23KJ/mol to 118.57KJ/mol.(3)The engine load characteristics test of the nano-copper lubricating oil additive is tested by the diesel engine bench test,which is used to determine its influence on the diesel on the economic indicators and emission indicators of the diesel engine.The results show that the use of nano-copper lubricating oil additives can reduce the fuel consumption of the engine by 6.8%under low-speed and heavy-load conditions.The use of nano-copper lubricating oil additive can effectively reduce CO emissions at medium and low speeds.The use of nano-copper lubricant additive has a significant reduction effect on HC emissions at low speed.After the use of additives,the mass concentration of particulate matter significantly decreased under medium and low speed conditions.(4)Nano-copper lubricant additive can effectively reduce the emission of diesel vehicle particulates in the course of vehicle use,regardless of quick-effect or long-term use;nano-copper lubricant additive can promote the combustion of fuel and reduce the product during the use of gasoline vehicles.The generation of carbon can also effectively reduce the fuel consumption of gasoline vehicles and the emission of exhaust pollutants.