Preparation and tribological performance of MoS2 nanoparticles supported on fly ash microparticles. Issue 1 (6th October 2022)

• Record Type: Journal Article
• Authors: Hu, Kunhong; Miao, Yan; Lu, Ziyan
• Is Part Of: Industrial lubrication and tribology. Volume 75:Issue 1(2023)
• Page Start: 51
• Page End: 59
• Publication Date: 2022-10-06
• Subjects: MoS2 -- Additive -- Friction and wear -- Lubrication -- Fly ash; Lubrication and lubricants -- Periodicals; Tribology -- Periodicals; 621.89
• DOI: 10.1108/ILT-06-2022-0185
• Languages: English
• ISSNs: 0036-8792

Abstract

Abstract : Purpose: This paper aims to explore the preparation and tribological performance of MoS2 nanoparticles supported on fly ash (FA) microparticles. Design/methodology/approach: FA was activated by NaOH, oleic acid and HCl to obtain three modified FA samples. Nano-MoS2 was deposited on them to form MoS2 /FA additives for poly-α-olefin (PAO) modification. Tribological tests were conducted on a reciprocating rig through the ball-on-disk friction manner. Using X-ray diffraction, scanning electron microscope, energy dispersive spectrometer, Raman spectrometer and element analyzers, the products and their lubrication mechanisms were characterized. Findings: At 1.5 Wt.%, nano-MoS2 and MoS2/FA could remarkably improve the tribological properties of PAO. The nano-MoS2 deposited on the HCl-activated FA presented better lubrication performance than nano-MoS2 . It could reduce friction and wear by approximately 27% and approximately 66%, respectively. The lubrication of MoS2 /FA can be attributed to the formation of MoS2 and carbon containing lubricating film. Originality/value: FA was applied as a supporter to prepare MoS2 /FA lubricants. The reuse of FA, a solid waste, is important for environmental protection. Moreover, MoS2 /FA is more economical than nano-MoS2 as a lubricant, because it contains approximately 71% of low-cost FA.