Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

Abstract

Abstract:The combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of various polymer materials under natural seawater lubrication was investigated. After the investigation, the wear morphology of the contact surface was observed by a laser scanning confocal microscope, and the texture of the wear scars and tracks were presented in 3D profiles. Moreover, the mechanism of mixed lubrication and wear resistance was analyzed. The results demonstrated that the friction coefficient of carbon fiber-reinforced polyetheretherketone (CFRPEEK) is the lowest and fluctuates at approximately 0.11. Moreover, the seven polymer materials in ascending order of friction coefficients are CFRPEEK, carbon fiber-reinforced polyamide-imide, polytetrafluoroethylene, polyoxymethylene, polyetheretherketone (PEEK), acrylonitrile butadiene styrene resin, and glass fiber-epoxy resin. More critically, the simultaneous incorporation of deposition, polymeric scrap, hydrophilic groups, and seawater resulted in a decrease in the friction and wear of polymer materials under seawater lubrication. This observation implies that a synergistic friction-reducing and wear-resistant effect exists between carbon fiber, seawater, and the molecular structure of PEEK. As a result, a highly effective polymer material was discovered, CFRPEEK, which has the lowest friction coefficient of 0.11 and lowest wear rate of 2 × 10 -5 mm 3 ·(N·m) −1 among the polymer materials; this validates the selection of dual friction pairs for seawater hydraulic components.

A review of recent advances in tribology

“…Some of the coatings associated with superlubricity have been introduced in the superlubricity section and are not covered in detail again. Here, several new advances in tribological-related coating technology are briefly introduced, such as oxide coating [183][184][185][186], metal coating [187,188], composite coating [183,185,189,190], ceramic coating [191,192], and so on.…”

“…Zhou et al [188] investigated the self-loosening of threaded fasteners subjected to dynamic shear load with three kinds of typical coatings, PTFE, MoS 2 , and TiN applied to bolts and nuts. Wang et al [190] reported that the friction coefficient of carbon fiber-reinforced polyetheretherketone (CFRPEEK) is the lowest and fluctuates at approximately 0.11 and it has the lowest wear rate of 2×10 -5 mm 3 /(N•m) among the experimental materials, including CFRPEEK, carbon fiberreinforced polyamide-imide, polytetrafluoroethylene, polyoxymethylene, polyetheretherketone (PEEK), acrylonitrile butadiene styrene resin, and glass fiberepoxy resin under seawater lubrication. Wang et al [191] presented the aqueous lubrication of tribopairs formed by PEEK and PI material sliding against Si 3 N 4 ceramic.…”

The effect of different layered materials on the tribological properties of PTFE composites

“…Polymers and their composites are extensively used as tribo-engineering materials. The excellent physical and chemical characteristics of polymer-based composites make them a promising class of important tribomaterials because of their self-lubricating performance, chemical stability, superior process ability as well as cost-effectiveness [1][2][3].…”

Designing the organoplastics based on aromatic polyamide, study of their operational properties and applicability

“…Paper [9] shows that the orientation of short carbon fibers significantly affects the mechanical and tribological properties of PCMs based on polyamides. In this case, depending on the orientation of fibers, the carbon plastics are obtained for different purposes.…”