SiO₂ modified graphene oxide hybrids for improving fretting wear performance of ultra-high molecular weight polyethylene

Abstract

Purpose The purpose of this paper is to investigate the fretting wear performance of ultra-high-molecular-weight-polyethene (UHMWPE) with addition of GO and SiO2. Design/methodology/approach In this study, GO were synthesized and SiO2 nanoparticles were grafted onto GO. The effect of nanofiller on fretting wear performance of UHMWPE was investigated. Findings The results indicated that GO was successfully synthesized and SiO2 nanoparticles successfully grafted onto GO. Incorporation of GS was beneficial for the reduction in friction and the improvement in wear resistance of UHMWPE. GO was beneficial for reducing friction coefficient, while SiO2 was good for improving wear resistance. There existed a tribological synergistic effect between GO nanosheet and SiO2 nanoparticles. Research limitations/implications The hybrids of GS were promising nanofiller for improving the fretting wear performance of UHMWPE. Originality/value The main originality of the research is to reveal the effect of GO and SiO2 nanoparticles on fretting behavior of UHMWPE. The result indicated hybrids of GS were promising nanofiller for improving the fretting wear performance of UHMWPE.

Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

“…The composite obtained by combining the two not only has the properties of the matrix material, but also has the properties of graphite, such as self-lubricating, small expansion coefficient, good shock absorption, thermal conductivity, and so on. 1 The main function is to improve the wear resistance and abrasion resistance of the material, which is very suitable for manufacturing piston, bearing, cylinder liner and other wear resistance and shock absorption parts. On the other hand, a lubricant such as graphite is inserted into the column, thus reducing the weight of the copper plate itself.…”

Size effects of silica on the viscosity of ultra‐high molecular weight polyethylene and its disentanglement mechanism

“…Nanoparticles with small particle size can increase the mobility of chain segments and promote the orderly arrangement of chain segments, thus promoting the discharge of mesophases into the crystalline region and increasing the content of the crystalline region 30,33 . As the silica particle size becomes larger, this ability to promote chain segment movement gradually becomes weaker, and the content of the mesophase rises, acting more to enhance the linkage between the crystalline and amorphous regions to enhance wear resistance properties 3,21 . Therefore, it was demonstrated by Raman spectroscopy that different particle sizes of silica affect the chain segment mobility of the polymer and thus the degree of entanglement of the chain segments to influence the three‐phase content of the polymer.…”

“…30,33 As the silica particle size becomes larger, this ability to promote chain segment movement gradually becomes weaker, and the content of the mesophase rises, acting more to enhance the linkage between the crystalline and amorphous regions to enhance wear resistance properties. 3,21 Therefore, it was demonstrated by Raman spectroscopy that different particle sizes of silica affect the chain segment mobility of the polymer and thus the degree of entanglement of the chain segments to influence the three-phase content of the polymer.…”

“…Therefore, some researchers are adding inorganic particles to blends of UHMWPE and other polymers to restore some wear resistance. [21][22][23][24] In general, the addition of inorganic particles increases the wear resistance and at the same time increases the viscosity. This is consistent with Einstein's prediction.…”

“…The researchers are constantly working on new methods to reduce viscosity of UHMWPE without compromising its mechanical and wear resistance properties. Therefore, some researchers are adding inorganic particles to blends of UHMWPE and other polymers to restore some wear resistance 21–24 . In general, the addition of inorganic particles increases the wear resistance and at the same time increases the viscosity.…”