Preparation And Friction Properties Of H-BN Supported Metal Oxide Nanoparticles

Wear is the phenomenon of material loss on the surface caused by the contact or relative movement of two object surfaces.It is not only the inevitable result of friction,but also an important reason to hinder the industrial development of various countries.The use of lubricants can greatly reduce energy consumption.With the rise of environmental awareness,traditional lubricant additives comprising phosphorus,sulfur,chlorine,and other substances faced significant hurdles.Developing green and environmentally friendly lubricant additives has become an important research direction.Additives can be divided into organic lubricating additives,inorganic lubricating additives,ionic liquids,etc.Hexagonal boron nitride(h-BN)is a typical inorganic non-metallic material,which is an ideal material for inorganic lubricating additives due to its excellent tribological properties.In addition,metal oxide nanoparticles are often used alone or in combination as lubricating additives to reduce friction and wear.In fact,composites often exhibit better performance than individual nanoparticles due to the synergistic effect of multiple types of nanoparticles.Therefore,in this paper,four different nano-metal oxide particles were supported by h-BN sheet as carrier by hydrothermal synthesis method,and four series of composite nanoparticles were prepared,namely Cu O/h-BN,Cu₂O/h-BN and Two kinds of Al OOH/h-BN obtained under different preparation conditions.The product was characterized by means of FT-IR,XRD,SEM and TEM,which showed that the target composite was obtained.The morphology analysis of the product showed that the difference in the molar ratio of reaction materials would affect the metal oxide particles on h-BN.loading,but basically did not affect the size of nanoparticles and h-BN sheets.The tribological properties of each series of composites were tested by a four-ball friction machine.The test confirmed that the prepared series of composite nanoparticles have anti-friction and anti-wear properties in both aqueous solution and water-ethylene glycol mixed solution,and have certain properties as liquid lubricant additives.application prospects.