Covalently attached graphene–ionic liquid hybrid nanomaterials: synthesis, characterization and tribological application

2016 ◽  
Vol 4 (3) ◽  
pp. 926-937 ◽  
Author(s):  
Rashi Gusain ◽  
Harshal P. Mungse ◽  
Niranjan Kumar ◽  
T. R. Ravindran ◽  
Ramanathaswamy Pandian ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Friction And Wear ◽  
Lubricant Additives ◽  
Hybrid Nanomaterials ◽  
Tribological Application ◽  
Nanomaterials Synthesis ◽  
Lubrication Properties

Covalently interacted graphene–ionic liquid hybrid nanomaterials as lubricant additives significantly improve lubrication properties by reducing friction and wear.

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.

Graphene–Ionic Liquid Based Hybrid Nanomaterials as Novel Lubricant for Low Friction and Wear

2013 ◽  
Vol 5 (10) ◽  
pp. 4063-4075 ◽  
Author(s):  
Varsha Khare ◽  
Minh-Quan Pham ◽  
Nitee Kumari ◽  
Hae-Sung Yoon ◽  
Chung-Soo Kim ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Friction And Wear ◽  
Hybrid Nanomaterials ◽  
Low Friction

Friction and Wear Properties of Halogen-Free and Halogen-Containing Ionic Liquids Used As Neat Lubricants, Lubricant Additives and Thin Lubricant Layers

2017 ◽  
Author(s):  
Hong Guo ◽  
Rui Liu ◽  
Alfonso Fuentes-Aznar ◽  
Patricia Iglesias Victoria
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Friction And Wear ◽  
Mineral Oil ◽  
Surface Interactions ◽  
Lubricant Additives ◽  
Wear Properties ◽  
Sem Images ◽  
Wear Reduction ◽  
Halogen Free

The lubricating ability of one halogen-free and one halogen-containing phosphonium-based ionic liquids are investigated as neat lubricants, lubricant additives and thin lubricant layers in steel-steel contact. The use of the ionic liquids in any of the three lubricating methods reduced friction and wear compared to a base mineral oil. The halogen-free ionic liquid outperformed the halogen-containing ionic liquid in the three methods of lubrication. The highest friction and wear reduction were obtained when ionic liquids were used as neat lubricants. Under this condition, friction reductions of 37.21% and 25.73 %, and wear reduction of 47.12% and 41.18% compared to the based mineral oil were obtained for the halogen-free and halogen-containing ionic liquids respectively. The wear mechanisms and surface interactions are discussed in terms of ionic liquid-metal surface interactions from optical and SEM images and EDS analysis.

Oil-soluble ionic liquid to lubricate silicon

2021 ◽  
pp. 135065012098488
Author(s):  
Waleed Al-Sallami ◽  
Pourya Parsaeian ◽  
Abdel Dorgham ◽  
Anne Neville
Keyword(s):  
Ionic Liquid ◽  
High Temperature ◽  
Friction And Wear ◽  
Tribological Performance ◽  
Considerable Reduction ◽  
Zinc Dialkyldithiophosphate ◽  
Lubrication Mechanism ◽  
Wear Coefficient ◽  
Wear Performance ◽  
Micro Scale

Trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate (phosphonium phosphate) ionic liquid is soluble in non-polar lubricants. It has been proposed as an effective anti-wear additive comparable to zinc dialkyldithiophosphate. Previously, phosphonium phosphate has shown a better anti-wear performance under some conditions such as high temperature. In this work, the tribological performance and the lubrication mechanism of phosphonium phosphate are compared with that of zinc dialkyldithiophosphate when lubricating silicon under various tribological conditions. This can lead to an understanding of the reasons behind the superior anti-wear performance of phosphonium phosphate under some conditions. A micro-scale study is conducted using a nanotribometer. The results show that both additives lead to a considerable reduction in both friction and wear coefficients. The reduction in the wear coefficient is mainly controlled by the formation of the tribofilm on the rubbing surfaces. Zinc dialkyldithiophosphate can create a thicker tribofilm, which results in a better anti-wear performance. However, the formation of a thicker film will lead to a faster depletion and thus phosphonium phosphate can provide better anti-wear performance when the depletion of zinc dialkyldithiophosphate starts.

scholarly journals Towards Phosphorus Free Ionic Liquid Anti-Wear Lubricant Additives

Lubricants ◽  
2016 ◽  
Vol 4 (2) ◽  
pp. 22 ◽  
Author(s):  
Anthony Somers ◽  
Ruhamah Yunis ◽  
Michel Armand ◽  
Jennifer Pringle ◽  
Douglas MacFarlane ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additives

scholarly journals Study of the Lubricating Ability of Protic Ionic Liquid on an Aluminum–Steel Contact

Lubricants ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 66 ◽  
Author(s):  
Akshar Patel ◽  
Hong Guo ◽  
Patricia Iglesias
Keyword(s):  
Ionic Liquid ◽  
Friction And Wear ◽  
Constant Load ◽  
Economic Losses ◽  
Contact Friction ◽  
Wear Volume ◽  
Sliding Velocity ◽  
Protic Ionic Liquid ◽  
Wear Reduction ◽  
Pin On Disk

Contact friction between moving components leads to severe wear and failure of engineering parts, resulting in large economic losses. The lubricating ability of the protic ionic liquid, tri-[bis(2-hydroxyethylammonium)] citrate (DCi), was studied as a neat lubricant and as an additive in a mineral oil (MO) at various sliding velocities and constant load on an aluminum–steel contact using a pin-on-disk tribometer. Tribological tests were also performed at different concentrations of DCi. When DCi was used as an additive in MO, friction coefficient and wear volume were reduced for each sliding velocity, with a maximum friction and wear reduction of 16% and 40%, respectively, when 2 wt % DCi was added to MO at a sliding velocity of 0.15 m/s. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were also applied to analyze the wear mechanism of the interface lubricated by MO and DCi as additive.

Friction and wear of aluminium–steel contacts lubricated with ordered fluids-neutral and ionic liquid crystals as oil additives

Wear ◽  
2004 ◽  
Vol 256 (3-4) ◽  
pp. 386-392 ◽  
Author(s):  
P. Iglesias ◽  
M.D. Bermúdez ◽  
F.J. Carrión ◽  
G. Martı́nez-Nicolás
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Friction And Wear ◽  
Oil Additives ◽  
Ionic Liquid Crystals

Synthesis of poly(ionic liquid)s brush-grafted carbon dots for high-performance lubricant additives of polyethylene glycol

Carbon ◽  
2019 ◽  
Vol 154 ◽  
pp. 301-312 ◽  
Author(s):  
Zihao Mou ◽  
Baogang Wang ◽  
Hongsheng Lu ◽  
Shanshan Dai ◽  
Zhiyu Huang
Keyword(s):  
Ionic Liquid ◽  
Polyethylene Glycol ◽  
Carbon Dots ◽  
High Performance ◽  
Lubricant Additives ◽  
Poly Ionic Liquid
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