Characterization and Tribological Behavior of Polystrene(PS)-TiO2 Nano-spheres

Polystrene（PS）-TiO2 nano-spheres were chemically synthesized. The structure characterization of theprepared PS-TiO2 nano-spheres was investigated by means of transmission electron microscopy（TEM）and Fouriertransform infrared spectroscopy（FTIR）. The thermal stability of PS-TiO2 nano-spheres was identified using athermal analyzer（DSC & TGA）. The tribological behaviors of PS-TiO2 nano-spheres as additives in paraffin oilwere evaluated on a four-ball machine. The worn surfaces were analyzed with X-ray photoelectron spectroscopy（XPS）also. Experimental results indicate that the PS-TiO2 nano-spheres，under a certain condition，have agood anti-wear performance and improve striking failure load. This is attributed to the formation of a chemical reactionboundary film consisting of TiO2，Fe2O3 and organic fragments.