Controllable superlubricity achieved with mixtures of green ionic liquid and glycerol aqueous solution via humidity

Hua, Jing; Björling, Marcus; Larsson, Roland; Shi, Yijun

doi:10.1016/j.molliq.2021.117860

Cited by 19 publications

(10 citation statements)

References 37 publications

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“…Like water, the lubricity of glycerol can also be altered by adding small quantities of ionic liquids, especially in the thin film lubrication regime (Hua et al, 2022). Small quantities (0-3 wt.%) of [Choline][Proline] ionic liquid were added to glycerol and the lubricity of mixed fluid was tested under simple sliding conditions with humidity as a variable.…”

Section: Superlubricity In Glycerol and Glycol Liquidsmentioning

confidence: 99%

“…It was shown that H+ ions from water could form a layer on the contact surfaces that in effect preferentially supports the applied normal load and locks in water molecules. The effect is similar when adding ionic liquids adsorbing on the surfaces (Hua et al, 2022). The advantage of this route over pure moisture manipulation is that superlubricity can be achieved even in a thin film lubrication regime rather than in elastohydrodynamic lubrication (EHL) regimes that need thicker liquid entrapment.…”

Section: Superlubricity In Glycerol and Glycol Liquidsmentioning

confidence: 99%

“…Gao et al (Gao et al, 2021) have demonstrated reliable superlubricity using a combination of antimony trioxide (Sb 2 O 3 ) and magnesium silicate hydroxide coated with carbon (MSH/C) onto a nickel superalloy substrate. The coating of ~1 µm thickness was deposited on a nickel superalloy using burnishing of a base antimony trioxide (Sb 2 O 3 ) layer, and (Ren et al, 2020) a) Steel vs. ta-C sliding in Glycerol (Long et al, 2019) Thin film a) Glycerol with Ionic Liquids (Hua et al, 2022) a) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (Ge et al, 2018b) b) BP flakes Graphene-Oxide in Alcohols (Ren et al, 2021) b) Steel vs. ta-C sliding in Inositol (Matta et al, 2008) Fluid film b) Glycerol in steel vs. steel (Ma et al, 2021a) b) 1-dodecanol (Crystallization) (Reddyhoff et al, 2021) c) MXenes in Glycerol (Yi et al, 2021a) c) DLC and Glycerol (Björling and Shi, 2019) Elasto/Hydrodynamic c) Fructose, Ethylene Glycol (Ma et al, 2021b) c) DLC with Acid Treatment (Khan et al, 2018) d) Aqueous solutions in Glycol (Liu et al, 2019)…”

Section: Msh/c System: Tribochemically-generated Lubricious Carbon Filmsmentioning

confidence: 99%

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Progress in Superlubricity Across Different Media and Material Systems—A Review

et al. 2022

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Superlubricity is a terminology often used to describe a sliding regime in which the adhesion leading to friction or resistance to sliding literally vanishes. For improved energy security, environmental sustainability, and a decarbonized economy, achieving superlubric sliding surfaces in moving mechanical systems sounds very exciting, since friction adversely impacts the efficiency, durability, and environmental compatibility of many moving mechanical systems used in industrial sectors. Accordingly, scientists and engineers have been exploring new ways to achieve macroscale superlubricity through the use of advanced materials, coatings, and lubricants for many years. As a result of such concerted efforts, recent developments indicate that with the use of the right kinds of solids, liquids, and gases on or in the vicinity of sliding contact interfaces, one can indeed achieve friction coefficients well below 0.01. The friction coefficient below this threshold is commonly termed the superlubric sliding regime. Hopefully, these developments will foster further research in the field of superlubricity and will ultimately give rise to the industrial scale realization of nearly-frictionless mechanical systems consuming far less energy and causing much-reduced greenhouse gas emissions. This will ultimately have a substantial positive impact on the realization of economically and environmentally viable industrial practices supporting a decarbonized energy future. In this paper, we will provide an overview of recent progress in superlubricity research involving solid, liquid, and gaseous media and discuss the prospects for achieving superlubricity in engineering applications leading to greater efficiency, durability, environmental quality, and hence global sustainability.

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Section: Superlubricity In Glycerol and Glycol Liquidsmentioning

confidence: 99%

Section: Superlubricity In Glycerol and Glycol Liquidsmentioning

confidence: 99%

Section: Msh/c System: Tribochemically-generated Lubricious Carbon Filmsmentioning

confidence: 99%

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Progress in Superlubricity Across Different Media and Material Systems—A Review

et al. 2022

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“…Although lubricants can be used for improving tribological behaviors, ultimately it is the energy saved by a tribological system that is crucial [146][147][148]. Superlubricity can be divided into two forms, namely, nonproportional contact and disordered solid interface superlubrication.…”

Section: Superlubricitymentioning

confidence: 99%

Recent Progress on Carbon Nanomaterials for Resisting the Wear Damages

Yin

Chen

Zhang

et al. 2022

Journal of Nanomaterials

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In recent years, carbon nanomaterials such as fullerenes, carbon nanotubes, graphene, and nanodiamonds have been regarded as versatile triboproducts such as copper coins for various engineering/commerce-scaled applications. Their large-scale usages as ideal reinforcements for the key tribomaterials are motivated by their huge interfacial areas, unique physical/chemical characteristics, as well as multiple scale load-transferring mechanisms. Numerous investigators have kept on studying the possibilities of using carbon nanomaterials as solid lubricants, lubricating additives, or the superlubricated push hand. This review offers a comprehensive discussion of up-to-date survey in carbon nanomaterials for achieving the low friction and high wear resistant in the forms of coatings, bulk materials, lubricants; or even superlubric state in the tribosystems from nanoscale to macroscale. Finally, important conclusions, foreseeable challenges, and future outlooks for carbon nanomaterials are highlighted as the concluding remarks that are needed to impulse nanotechnology maturation and developments of tribological fields such as copper coin protections.

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“…Thus, some researchers have explored the effectiveness of IL as an additive for high-polarity polyether, polyester, low-polarity mineral oil, poly-α-olefin (PAO), and even water-based lubricants instead. [36][37][38] It was found that adding IL into polyethylene glycol lubricant or hydrocarbon lubricating oil could reduce the friction and wear of the mixed lubrication state, and increase the thickness of the oil film in the elastohydrodynamic lubrication state. [39,40] Moreover, when only 0.5 wt% IL was added into the creesh (fat or grease), the base oil showed good tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Viscosity and Resistance of Oil Film: A New Way to Investigate the Controllable Friction between Charged Interfaces Lubricated by Ionic Lubricating Oil

Zhang

Chen

Liu

et al. 2022

Adv Materials Inter

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Intelligent lubricating materials can control the coefficient of friction between interfaces in response to external stimuli. Considering that mechanical transmission parts are mostly used in oil‐based lubrication environments, the lubrication performance and electrical regulation mechanism of poly‐α‐olefin‐50 (PAO50), a lubricating oil, containing 1‐octyl‐3‐methylimidazolium hexafluorophosphate ([OMIm]PF6), an ionic liquid (IL), are investigated in this study. Friction tests on a universal micro‐tribometer under current stimulation show that ionic lubricating oil has an excellent lubrication performance and electrical responsiveness. By changing the current strength, ion content, and the load, the reasons behind the change in the coefficient of friction are investigated. Ion aggregation results in an increase in the viscosity of the lubricating oil film, which leads to an increase in the coefficient of friction. Moreover, the real‐time resistance value of the oil film is obtained through a self‐built voltage acquisition device. The mechanism of the electronic control of friction is verified by analyzing the influence of the change in ion distribution on the resistance of the oil film. There is a correlation between the resistance and viscosity of the oil film. The results of this study may be significant in guiding research on the intelligent control of friction under oil‐based lubrication.

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Controllable superlubricity achieved with mixtures of green ionic liquid and glycerol aqueous solution via humidity

Cited by 19 publications

References 37 publications

Progress in Superlubricity Across Different Media and Material Systems—A Review

Progress in Superlubricity Across Different Media and Material Systems—A Review

Recent Progress on Carbon Nanomaterials for Resisting the Wear Damages

Relationship between Viscosity and Resistance of Oil Film: A New Way to Investigate the Controllable Friction between Charged Interfaces Lubricated by Ionic Lubricating Oil

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