Study On Preparation And Friction Properties Of Graphene Load Fe₃O₄ Nanomaterials

Friction between objects not only consumes energy,but also causes increased wear and tear,which can cause failure,and if it can effectively reduce friction between objects,it can not only reduce the loss of effective function,but also extend the failure time.The research shows that graphene and trioxide particles have good lubrication properties,because the characteristics of nanoparticles make it difficult to disperse steadily in lubricants,which will affect their good trismonology performance,so this paper uses several different modification methods to make surface modifications to graphene load trioxide trioxide particles.And its tribology performance is studied.First of all,the method of liquid phase ultrasound and chemical modification was prepared to prepare the oleic acid modification,castor oleic acid modification,oleic acid and silane conjugate kh570 common modification and the combined modified four modified graphene load tri-iron nanoparticles,and the four particles were characterized.The results showed that when the common modification of oleic acid and silane coupling KH570 was made,the trioxide particles were the best distributed on the surface of graphene,and there was no obvious reunion phenomenon,and the dispersion effect was the worst when the ricin oil acid modification was used.Secondly,the dispersion stability of nanocomposites prepared by four different modification methods was studied by natural sedimentation and characteristic element method,and the results showed that the dispersion stability of nanocomposites prepared by the common modification of oleic acid and silane coupling KH570 was the best in the lubricant,and the content of iron decreased by 32.2 days.% began to precipitate at the latest,with the lowest amount of precipitation occurring in 20 days.The dispersal stability of nano-composite materials with ricin oleic acid modification was the worst in the lubricant,and the stability effect of KH570 modified dispersion of castor oleic acid and silane coupling was better than that of oleic acid modification.In addition,the frictional performance test of graphene load trioxide nanoparticles prepared by different modified methods shows that the proportion of lubricant skew of nanomaterials added to the four modification methods is 0.04%,the grinding point diameter of the oil grinding composite lubricant reaches the minimum,and the grinding point diameter is minimum,0.413mm;The maximum cardless bite PB increased with the proportion,showing the trend of first increase and then basic unchanged,the overall effect of frictionology oleic acid and silane coupling agent common modification,castor oleic acid and silane coupling agent common modification,oleic acid modification,castor oleic acid modification.Finally,the dynamic,economical and clean composite lubricants for the combined modification of oil acid and silane coupling with a mass ratio of 0.01%were tested,and the wear amount of the main friction sub-layer and its friction surface were analyzed.,the economy is more obvious at heavy loads The clarity score of the engine of adding nanocomposite lubricants was 5.61 points lower than that of the total score when the nanocomposites were not added,the wear volume of the main friction sub-level was lower than when the nanocomposites were not added,and the friction subsurface surface appearance was better after the addition of nanocompositematerials,with no large cracks and signs of surface repair.