The effect of chemical structure on the tribological performance of perfluorosulfonate ILs as lubricants for Ti-6Al-4V tribopairs

Fan, Mingjin; Jin, Yaying; Han, Yuefeng; Ma, Lin; Li, Wenqian; Lu, Yu; Zhou, Feng; Liu, Weimin

doi:10.1016/j.molliq.2020.114286

Cited by 16 publications

(6 citation statements)

References 35 publications

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“…The absorption peak of P2p appeared near 133.2 eV. Combined with the absorption peaks of O1s at 856.2 eV and Ni2p near 861.3 eV, we inferred that NiPO4 was generated at the wear interface [37][38][39]. The combined absorption peaks of Ni2p, O1s, and S2p near 169.9 eV indicated the formation of NiSO4 at the wear interface [25,40].…”

Section: Xpsmentioning

confidence: 75%

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

Guo,

Liu,

et al. 2023

Coatings

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In this study, we synthesized three low-sulfur and low-phosphorus ionic liquids (ILs). These were N88816P8, P88816P8, and P88816DOSS. The viscosity and thermal stability of the three ILs were analyzed. The tribological properties and lubrication mechanisms of the three ILs were investigated as lubricants for a carbide ball–Inconel 690 nickel-based alloy friction pair and compared at 50 °C and 150 °C. The wear spots of the carbide ball and nickel-based alloy disc samples were characterized using SEM and EDS. The experimental results revealed that P88816P8 had excellent tribological properties. The lubrication mechanism of P88816P8 as a lubricant for the carbide ball–Inconel 690 nickel-based alloy friction pair was investigated using XPS. The excellent friction reduction and anti-wear properties of P88816P8 could be attributed to the tribo-chemistry between P88816P8 and Inconel 690 as well as the formation of a tribo-film on the wear-spot surface. This high-performance IL, suitable for carbide ball–Inconel 690 contact, will be applied to a cutting process of Inconel 690.

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Section: Xpsmentioning

confidence: 75%

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

Guo,

Liu,

et al. 2023

Coatings

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“…Hence, the no-slip condition is extended to the ordered ion structures present on the surface. This phenomenon of central localization is observed due to the high stability of the IL layer on the surface, even under nano-confinement and high share rate conditions [97][98][99][100].…”

Section: Velocity Profilesmentioning

confidence: 96%

A Molecular Dynamics Study on the Tribological Performance of Imidazolium−Based Ionic Liquids Mixed with Oil in Comparison to Pure Liquids

Lazarenko,

Khabaz

2022

Fluids

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The purpose of this work is to propose an advanced lubricant model of ILs used as additives to conventional oil. All-atoms molecular dynamics simulations are used to investigate the structure and tribology of oxidatively stable pure imidazolium-based ionic liquids (ILs), branched alkane low friction oil, and a mixture of ILs and oil confined between iron surfaces. Equilibrium and shear simulations are performed at a temperature of 450 K and undergo different applied loads and shear velocities to mimic engine operations. Density profiles reveal the formation of layered structures at the interface. The intensity and number of the density peaks vary according to the composition of the system and the applied pressure. Velocity profiles reveal the presence of no-slip conditions in the pure ILs system and very high slip for the oil. The presence of a stable IL layer at the surface of the mixed lubricant fully reduces the slip of oil. Overall, the mixture displays lower friction in comparison to pure ILs. The formed corrosion protective anion layer on the metal surface makes the mixture a potential candidate for a new generation of high-performance lubricants.

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“…Addressing the challenges faced by PTFE, such as severe adhesive and abrasive wear, ILs enhance their self-lubricating efficiency and reliability in moving parts. In a comprehensive study, the lubrication efficiency of Ti-6Al-4V tribopairs using various tetraalkyl phosphonium perfluorosulfonate ionic liquids (TPP ILs) was explored and compared with conventional ionic liquid (IL) lubricants [13]. Six different ILs were analyzed, including three conventional types, 1-butyl-3-methylimidazolium hexafluorophosphate (L-P104), 1-butyl-3-methylimidazolium tetrafluoroborate (L-B104), and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfony]imide (L-F104), along with three perfluorosulfonates (C 6 F 13 SO 3 P 4444 , C 8 F 17 SO 3 P 4444 , and C 8 F 17 SO 3 P 8888 ).…”

Section: Pfas In Ionic Liquidsmentioning

confidence: 99%

“…A popular use of PFAS in tribological applications is the utilization of PTFE in coatings and lubricants, renowned for its lubricity, resilience at high temperatures, and resistance to chemical attacks [10][11][12]. In the automotive sector, PFAS has seen significant use in the development of lubricants, engine oils, and hydraulic fluids [13][14][15]. It plays a crucial role in supplying essential features such as antiwear, anticorrosion, and antifoaming capabilities.…”

Section: Introductionmentioning

confidence: 99%

Forever Chemicals, Per-and Polyfluoroalkyl Substances (PFAS), in Lubrication

Dias,

Bons,

Kumar

et al. 2024

Lubricants

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Per- and polyfluoroalkyl substances (PFAS), also known as forever chemicals, exhibit exceptional chemical stability and resistance to environmental degradation thanks to their strong C-F bonds and nonpolar nature. However, their widespread use and persistence have a devastating impact on the environment. This review examines the roles of PFAS in tribological applications, specifically in lubricants and lubricating systems. This article focuses on conventional and advanced lubricants, including ionic liquids (ILs) and their use in modern automotive vehicles. The objective of this paper is to provide a comprehensive overview of the adverse impacts of PFAS whilst acknowledging their outstanding performance in surface coatings, composite materials, and as additives in oils and greases. The pathways through which PFAS are introduced into the environment via lubricating systems such as in seals and O-rings are identified, alongside their subsequent dispersion routes and the interfaces across which they interact. Furthermore, we examine the toxicological implications of PFAS exposure on terrestrial and aquatic life forms, including plants, animals, and humans, along with the ecological consequences of bioaccumulation and biomagnification across trophic levels and ecosystems. This article ends with potential remediation strategies for PFAS use, including advanced treatment technologies, biodegradation, recovery and recycling methods, and the search for more environmentally benign alternatives.

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The effect of chemical structure on the tribological performance of perfluorosulfonate ILs as lubricants for Ti-6Al-4V tribopairs

Cited by 16 publications

References 35 publications

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

A Molecular Dynamics Study on the Tribological Performance of Imidazolium−Based Ionic Liquids Mixed with Oil in Comparison to Pure Liquids

Forever Chemicals, Per-and Polyfluoroalkyl Substances (PFAS), in Lubrication

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