The effect of silica and copper nanoparticles in polyimide on the friction and wear of polyethersulfone/polyimide mixture

Abstract

The synergistic effect of silica (SiO2) and copper (Cu) nanoparticles in polyimide (PI) on the friction interfacial deformation of polyethersulfone/polyimide (PES/PI) blends was studied. Results indicate that the effect of SiO2 and Cu nanoparticles on the tribological performance of PES/PI nanocomposites is quite different from each other. The addition of SiO2 nanoparticles into PI improves the antifriction of PES/PI nanocomposites by 24.4%, but has little effect on the wear resistance. The incorporation of Cu nanoparticles into PI enhances the wear resistance of PES/PI nanocomposites by 55.5%, but has little effect on the antifriction. PES/PI nanocomposites achieve the better comprehensive tribological performance when the content of SiO2 and Cu is 0.8 wt and 0.2 wt%, respectively. The friction interfacial deformation analysis reveals that SiO2 in PI improve the continuity and uniformity of deformation in friction interface and reduce the severe wear of transfer film. Cu nanoparticles in PI improves the continuity but not the ununiformity of deformation. Thus, the abrasive wear of counterpart ball is severe. The synergistic effect of SiO2 and Cu nanoparticles in PI improves the continuity and uniformity of friction interfacial deformation, which contributes to the improvement of friction and wear of PES/PI nanocomposites.

State-of-the-art of polyimide films reinforced with fullerene-design, features and applications

“…65 Subsequently, the polyimide nanocomposite films own superior physical properties, relative to neat polyimide films. [66][67][68] In this respect, nanocarbon nanofillers have been filled in the polyimide films. [69][70][71] The polyimide/carbon nanotube nanocomposite films have been developed.…”

The tribological performance analysis of palm olein-based grease lubricants containing copper nanoparticle additive

“…The researchers speculated that Cu nanoparticles can enhance the tribological properties of the grease by serving as nano-bearings, forming an additional lubricating film when melted and deposited on the rubbing surface. In research by, Zhou et al, 43 the tribological properties of silica (SiO 2 ) and copper (Cu) nanoparticles added to a polymer mixture of polyethersulfone/polyimide (PES/PI) are evaluated by using a reciprocating ball-on-disc friction and wear tester. Their results showed that PES/PI with SiO 2 nanoparticles had a 24.4% reduction in COF and a 6.1% decrease in wear rate.…”