The influence of several silicates on the fretting behavior of UHMWPE composites

Abstract

Five kinds of silicates (attapulgite, kaolin, montnorillonite, synthetic mica, and talc) reinforced ultra‐high molecular weight polyethylene (UHMWPE) composites were prepared. The fretting performance of the composites was investigated using an oscillating reciprocating friction and wear tester in a ball‐on‐plate mode. The thermodynamic property and crystallinity of the composites were evaluated, and the worn morphology was also observed. Result shows that the heat‐resistance and the crystallinity of the composites are generally improved. The friction coefficient and mass loss of the composites reduced than those of the neat UHMWPE. Thereinto, the attapulgite/UHMWPE composite shows the best fretting resistance performance. The heat resistance of composites increases due to the reinforcement of silicates. Meantime, the friction load can be distributed by the filler in the matrix. Moreover, the different fretting resistance performance of the composites is due to the different dispersion degree and the interfacial bonding force between the fillers and the UHMWPE matrix.

Excellent effect of lubrication performance of chitosan/polyethylene glycol/palygorskite as water‐based lubricating additive on 304 stainless steel and polymer pairs

“…Water was a kind of poor lubricant, because of its low viscosity and small load‐bearing capacity. [ 14 ] The lubrication effect of water was not ideal, but by adding some additives, the tribological performance of water can be significantly improved. [ 15 ] Some studies revealed that polyethylene glycol (PEG) can effectively improve the lubrication performance.…”

Preparation and characterization of activated carbon/ultra‐high molecular weight polyethylene composites

“…Adding fillers such as inorganic particles, [ 20 ] carbon additives, [ 21 ] and graphene [ 22 ] to reinforce them is the most straightforward and most efficient modification method. Wang et al [ 23 ] used five different silicates to enhance UHMWPE and compared the effects of different fillers on the fretting properties, thermodynamic properties, and crystallinity of composite materials. However, these studies usually use non‐renewable resources as fillers.…”