scholarly journals Antifriction and Antiwear Properties of an Ionic Liquid with Fluorine-Containing Anion Used as Lubricant Additive

2017 ◽  
Vol 65 (2) ◽  
Author(s):  
D. Blanco ◽  
R. González ◽  
J. L. Viesca ◽  
A. Fernández-González ◽  
M. Bartolomé ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additive ◽  
Antiwear Properties

Remarkable Lubricating Effect of Ionic Liquid Modified Carbon Dots as a Kind of Water-Based Lubricant Additives

NANO ◽  
2017 ◽  
Vol 12 (09) ◽  
pp. 1750108 ◽  
Author(s):  
Xiang Liu ◽  
Zhiyu Huang ◽  
Weiwei Tang ◽  
Baogang Wang
Keyword(s):  
Ionic Liquid ◽  
Carbon Dots ◽  
Lubricant Additive ◽  
Wear Volume ◽  
One Pot ◽  
Load Carrying ◽  
Water Based ◽  
Antiwear Properties ◽  
The Mean ◽  
Base Liquid

Ionic liquid modified carbon dots (CDs-IL) were successfully synthesized by one-pot pyrolysis. The tribological properties of CDs-IL as a kind of water-based lubricant additive were investigated under four-ball mode. The experimental results demonstrated that the added CDs-IL not only increased load-carrying capacity of base liquid but also displayed remarkable friction-reducing and antiwear properties. At an optimal concentration of 0.05[Formula: see text]wt.% and a proper load of 50[Formula: see text]N, the mean friction coefficient and wear volume reduced by 65% and 60%, respectively. The remarkable lubricating effect of CDs-IL was attributed to the boundary tribofilm formed by absorption and deposition of CDs-IL on rubbing surfaces. The lubricating effect of CDs-IL especially antiwear effect greatly attenuated when the load was lower or higher than 50 N because the function of deposition tribofilm formed by CDs-IL was suppressed by the absorption tribofilm or tribochemical film derived from triethanolamine in base liquid, respectively.

scholarly journals Effect of Ionicity of Three Protic Ionic Liquids as Neat Lubricants and Lubricant Additives to a Biolubricant

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 713 ◽  
Author(s):  
Hong Guo ◽  
Angela Rina Adukure ◽  
Patricia Iglesias
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Friction And Wear ◽  
Cost Effective ◽  
Lubricant Additive ◽  
Lubricant Additives ◽  
Environmental Damage ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Wear Process

Friction and wear of sliding surfaces are responsible for important energy losses and negative environmental effects. The use of environmentally friendly and cost-effective protic ionic liquids as neat lubricants and lubricant additives has the potential to increase the efficiency and durability of mechanical components without increasing the environmental damage. In this work, three halogen-free protic ionic liquids with increasing extent of ionicity, 2-hydroxyethylammonium 2-ethylhexanoate, 2-hydroxymethylammonium 2-ethylhexancate, and 2-hydroxydimethylammonium 2-ethylhexanoate, were synthesized and studied as neat lubricants and additives to a biodegradable oil in a steel–steel contact. The results show that the use of any protic ionic liquid as a neat lubricant or lubricant additive reduced friction and wear with respect to the biodegradable oil. The ionic liquid with the lowest ionicity reached the highest wear reduction. The one possessing the highest ionicity presented the poorest friction and wear behaviors as a neat lubricant, probably due to the more ionic nature of this liquid, which promoted tribocorrosion reactions on the steel surface. This ionic liquid performed better as an additive, showing that a small addition of this liquid in a biodegradable oil is enough to form protective layers on steel surfaces. However, it is not enough to accelerate the wear process with detrimental tribocorrosion reactions.

scholarly journals Tribological behavior of oils additised with a phosphonium-derived ionic liquid compared to a commercial oil

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marlene Bartolomé Sáez ◽  
Antolin E. Hernández Battez ◽  
Jorge Espina Casado ◽  
José L. Viesca Rodríguez ◽  
Alfonso Fernández-González ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Peer Review ◽  
Formation Rate ◽  
Antiwear Additives ◽  
Stribeck Curve ◽  
Content Type ◽  
Base Oil ◽  
Base Oils ◽  
Antiwear Properties ◽  
Commercial Oil

Purpose The purpose of this paper is to study the antifriction, antiwear and tribolayer formation properties of the trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ionic liquid (IL) as additive at 1 wt.% in two base oils and their mixtures, comparing the results with those of a commercial oil. Design/methodology/approach The mixture of the base oils used in the formulation of the commercial oil SAE 0W20 plus the IL was tested under rolling/sliding and reciprocating conditions to determine the so-called Stribeck curve, the tribolayer formation and the antifriction and antiwear behaviors. Findings The use of this IL as additive in these oils does not change their viscosity; improves the antifriction and antiwear properties of the base oils, making equal or outperforming these properties of the SAE 0W20; and the thickness and formation rate of the tribolayer resulting from the IL-surface interaction is highly dependent on the type of base oil and influence on the friction and wear results. Originality/value The use of this IL allows to replace partial or totally commercial antifriction and antiwear additives. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2020-0179/

Ionic liquid modified multi-walled carbon nanotubes as lubricant additive

2015 ◽  
Vol 81 ◽  
pp. 38-42 ◽  
Author(s):  
Bo Yu ◽  
Zhilu Liu ◽  
Chenbo Ma ◽  
Jianjun Sun ◽  
Weimin Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Lubricant Additive ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Synthesis and evaluation of a protic ionic liquid as a multifunctional lubricant additive

Friction ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 568-576 ◽  
Author(s):  
Cheng Jiang ◽  
Yanan Wang ◽  
Huaigang Su ◽  
Weimin Li ◽  
Wenjing Lou ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additive ◽  
Protic Ionic Liquid

Antiwear Performance and Mechanism of an Oil-Miscible Ionic Liquid as a Lubricant Additive

2012 ◽  
Vol 4 (2) ◽  
pp. 997-1002 ◽  
Author(s):  
Jun Qu ◽  
Dinesh G. Bansal ◽  
Bo Yu ◽  
Jane Y. Howe ◽  
Huimin Luo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additive ◽  
Performance And Mechanism

scholarly journals Synergistic Behavior of Graphene and Ionic Liquid as Bio-Based Lubricant Additive

Lubricants ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 46
Author(s):  
Muhammad Harith Hasnul ◽  
Nurin Wahidah Mohd Zulkifli ◽  
Masjuki Hassan ◽  
Syahir Amzar Zulkifli ◽  
Mohd Nur Ashraf Mohd Yusoff ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additive ◽  
Dispersion Stability ◽  
Stable Suspension ◽  
Iron Sample ◽  
Frictional Performance ◽  
Additive Combination ◽  
Synergistic Behavior ◽  
Worn Surface ◽  
Lubricating Mechanism

The constant utilization of petroleum-based products has prompted concerns about the environment, hence a replacement for these products must be explored. Biolubricants are a suitable replacement for petroleum-based lubricants as they provide better lubricity. Biolubricant performance can be improved by the addition of graphene. However, there are reports that graphene is unable to form a stable suspension for a long period. This study used a graphene-ionic liquid additive combination to stabilize the dispersion in a biolubricant. Graphene and ionic liquid were dispersed into the biolubricant via a magnetic stirrer. The samples were tested using a high frequency reciprocating rig. The cast iron sample was then further observed using various techniques to determine the lubricating mechanism of the lubricant. Different dispersion stability of graphene was observed for different biolubricants, which can be improved with ionic liquids. All ionic liquid samples maintained an absorbance value of three for one month. The utilization of ionic liquid was also able to decrease the frictional performance by 33%. Further study showed that by using the ionic liquid alone, the frictional could only reduce the friction coefficient by 13% and graphene could only reduce the friction by 7%. A smooth worn surface scar can be seen on the graphene-IL sample compared to the prominent corrosive spot on the IL samples and abrasive scars on graphene samples. This indicates synergistic behavior between the two additives. It was found that the ionic liquid does not only improve the dispersion stability, but also plays a role in forming the tribolayer.

Synergistic Effect Between Phosphonium-Based Ionic Liquid and Three Oxide Nanoparticles as Hybrid Lubricant Additives

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
M. Upendra ◽  
V. Vasu
Keyword(s):  
Ionic Liquid ◽  
Surface Characterization ◽  
Sio2 Nanoparticles ◽  
Lubricant Additive ◽  
Conclusive Evidence ◽  
Base Oil ◽  
Cuo Nps ◽  
Worn Surface ◽  
Group 1 ◽  
Mineral Base

Abstract The tribological properties of ionic liquid (IL) trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate along with Al2O3, CuO, and SiO2 nanoparticles (NPs) have been investigated as a lubricant additive in a group 1 mineral base oil. About 0.5 wt% concentration of additives were added in base oil, and tribological tests were conducted at mild (stipulated) and severe (ASTM D 4172D) working conditions to assess the synergy between IL and NPs. This study shows the excellent synergy between IL, Al2O3, and CuO NPs in improving tribological and extreme pressure (EP) properties. Al2O3 and CuO hybrid nanolubricants decreased friction by 19% and 24%, whereas wear by 32% and 36%, respectively, at ASTM test conditions. IL displayed very good EP properties with a total improvement of 19%, and the highest load-bearing capacity was observed for Al2O3 and CuO hybrid nanolubricants with an improvement of 30% and 34%, respectively. No conclusive evidence of synergy has been observed between IL and SiO2 NPs. Surface characterization techniques, such as scanning electron microscope, energy dispersive X-ray spectrometer, and Raman spectra, demonstrated the formation of a tribofilm rich in phosphate and tribosintered NPs on the worn surface responsible for improved triboperformances.

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