Synthesis And The Tribological Properities Of Oil-Soluble Spheres Silica Nanoparticles

Oil-soluble spheres silica nanoparticles were synthesized using silicate ester as precursor of silica by surface-modification in situ.The mechanism for formation of the Oil-soluble spheres silica nanoparticles was also studied.The tribological properties as lubricating additives,the effect and mechanism of decreasing pressure was obtained. Based on the above results,the following main conclusions are reached:1.Preparation and tribological properties of oil-soluble surface modified sio₂ nanospheresUsing liquid phase chemical method,oil-soluble surface modified sio₂ nanospheres were preparation using silicate ester as precursor of silica by surface-modification in situ.By controlling of different temperature and solvent can obtained Oil-soluble spheres silica nanoparticles of the controlling of size.Transmission electron microscopy(TEM),X-ray diffraction(XRD),Fourier transform infrared(FT-IR)were used to characterize the structure modified sio₂ nanoparticles.The results show that the modified nanoparticles prepared in this work have the common features such as stable and highly dispersibility in organic solvents, etc.2.The tribological properties of the oil-soluble spheres sio₂ nanoparticles as lubricant additivesThe tribological properties of the modified Cu and oil-soluble spheres SiO₂nanoparticles and nano-SiO₂ particles as lubricant additives were evaluated.The results show that the oil-soluble SiO₂ nanoparticles have the unique properties with friction-reduction,anti-wear and load-carrying capacity.Oil-soluble Si0₂ nanoparticles as additives of lubricating oil and greases shows good antiwear and friction reducing properties.Their tribological properties are also closely relevant to the structure of suface-modifiers and silica morphologies.