Carbon Nanotubes and Onions as Lubricant Additives

2005 ◽  
Author(s):  
L. Joly-Pottuz ◽  
J. M. Martin ◽  
F. Dassenoy ◽  
B. Vacher ◽  
T. Mieno ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tribological Properties ◽  
Inorganic Nanoparticles ◽  
Lubricant Additives ◽  
Organic Additives ◽  
Friction Modifier ◽  
Tribochemical Reaction ◽  
Base Oil ◽  
Alpha Olefin ◽  
By Products

Most of lubricant additives used as friction modifier and anti-wear agents are mainly organic compounds containing sulphur and phosphorous. Their lubrication mechanism is based on a tribochemical reaction leading to tribofilm formation but also the formation of some harmful by-products. Inorganic nanoparticles (nanotubes, fullerenes, onions...), because of their unique morphology and very small size, could be envisaged for the replacement of such organic additives. The purpose of this work is to study and compare the tribological properties of different kinds of nanoparticles added and dispersed as additives to a lubricating base oil. Here, we are particularly interested in carbon nanotubes and graphite onions which were then tested and compared. Added to a poly-alpha-olefin (PAO) base oil, all nanoparticles tested show a reduction of both friction and wear of steel counterfaces. The detailed study of the concentration effect in PAO shows that 1wt% of nanotubes is sufficient to obtain good tribological properties. A structural modification of nanoparticles during friction was clearly evidenced by analytical TEM. In the case of nanotubes, flake-like wear debris made of amorphous carbon have been observed [1].

scholarly journals Tribological properties of novel palygorskite nanoplatelets used as oil-based lubricant additives

Friction ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 332-343 ◽  
Author(s):  
Kunpeng Wang ◽  
Huaichao Wu ◽  
Hongdong Wang ◽  
Yuhong Liu ◽  
Lv Yang ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Magnesium Silicate ◽  
Treatment Method ◽  
Lubricant Additives ◽  
Wear Volume ◽  
Wear Scar Diameter ◽  
Tribochemical Reaction ◽  
Base Oil ◽  
Transmission Electron ◽  
Ball Surface

AbstractLayered palygorskite (PAL), commonly called attapulgite, is a natural inorganic clay mineral composed of magnesium silicate. In this study, an aqueous miscible organic solvent treatment method is adopted to prepare molybdenum-dotted palygorskite (Amo-PMo) nanoplatelets, which greatly improved the specific surface area of PAL and the dispersion effect in an oil-based lubricant system. Their layered structure and size were confirmed using transmission electron microscopy (TEM) and atomic force microscopy. Following a tribological test lubricated with three additives (PAL, organic molybdenum (SN-Mo), and Amo-PMo), it was found that the sample of 0.5 wt% Amo-PMo exhibited the best tribological properties with a coefficient of friction of 0.09. Moreover, the resulting wear scar diameter and wear volume of the sliding ball surface were 63% and 49.6% of those lubricated with base oil, respectively. Its excellent lubricating performance and self-repairing ability were mainly attributed to the generated MoS2 adsorbed on the contact surfaces during the tribochemical reaction, thereby effectively preventing the direct collision between asperities on sliding solid surfaces. Thus, as-prepared Amo-PMo nanoplatelets show great potential as oil-based lubricant additives, and this study enriches the existing application of PAL in industry.

scholarly journals Preparation of TiO2/Ti3C2Tx hybrid nanocomposites and their tribological properties as base oil lubricant additives

RSC Advances ◽  
2017 ◽  
Vol 7 (8) ◽  
pp. 4312-4319 ◽  
Author(s):  
Maoquan Xue ◽  
Zhiping Wang ◽  
Feng Yuan ◽  
Xianghua Zhang ◽  
Wei Wei ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Tribological Properties ◽  
Lubricant Additives ◽  
Hybrid Nanocomposites ◽  
Phase Synthesis ◽  
Base Oil

TiO2/Ti3C2Tx hybrid nanocomposites were successfully prepared by a liquid phase synthesis technology. The hybrid nanocomposites improve the tribological properties of base oil by mending the surface and formation a uniform tribofilm on the surface.

Preparation and tribological properties of a kind of lubricant containing cerium borate nanoparticles as additives

2019 ◽  
Vol 234 (11) ◽  
pp. 1789-1797 ◽  
Author(s):  
Lifeng Hao ◽  
Feng Cao ◽  
Zewen Jiang ◽  
Jiusheng Li ◽  
Tianhui Ren
Keyword(s):  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Lubricant Additive ◽  
Wear Property ◽  
Reaction Products ◽  
Tribochemical Reaction ◽  
Base Oil ◽  
Reducing Ability ◽  
Borate Ester ◽  
Friction Reducing

Oil-soluble compounds containing boron as lubricating additives were restricted by the hydrolysis of borate ester. In order to overcome this problem, cerium borate nanoparticles modified with oleic acid (O-CeB) as a potential substitute for conventional lubricant additive were studied in detail. The microstructures of the prepared nanoparticles were characterized. Tribological properties of cerium borate nanoparticles used as additive in base oil were evaluated, and the worn surface of the steel ball was investigated. The results show that O-CeB possesses better anti-wear ability at relatively higher concentration; in particular, it shows better friction-reducing ability under all these studied concentrations. Under higher load, its anti-wear property and friction-reducing property are better than that of Vanlube 289 in the base oil. Based on these results of interferometric surface profilometer and X-ray photoelectron spectroscopy, it can be deduced that a continuous resistance film containing depositions and the tribochemical reaction products was formed during the sliding process.

Evaluation of the properties of polymer composites with carbon nanotubes in the aspect of their abrasive wear

2019 ◽  
Vol 1 (95) ◽  
pp. 5-12 ◽  
Author(s):  
A. Krzyżak ◽  
E. Kosicka ◽  
R. Szczepaniak ◽  
T. Szymczak
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Bisphenol A ◽  
Abrasive Wear ◽  
Polymer Composites ◽  
Tribological Properties ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Friction Modifier ◽  
The Impact

Purpose: Carbon nanotubes are used in composite materials due to the improvement of (including tribological) properties of composites, especially thermoplastic matrix composites. This demonstrates the potential of CNTs and the validity of research on determining the impact of this type of reinforcement on the composite materials under development. Design/methodology/approach: The article presents selected results of research on polymer composites made of C.E.S. R70 resin, C.E.S. H72 hardener with the addition of a physical friction modifier (CNTs) with a percentage by volume of 18.16% and 24.42%, respectively, which also acts as a reinforcement. The produced material was subjected to hardness measurements according to the Shore method and EDS analysis. The study of abrasive wear in reciprocating movement was carried out using the Taber Linear Abraser model 5750 tribotester and a precision weight. The surface topography of the composite material after tribological tests was determined using scanning electron microscopy (SEM). Some of the mentioned tests were carried out on samples made only of resin, used as the matrix of the tested polymer composite. Findings: Carbon nanotubes used in polymer matrix composites, including bisphenol A/F epoxy resin have an influence on the tribological properties of the material. The addition of carbon nanotubes contributed to a 24% increase in the Ra parameter relative to pure resin, to a level corresponding to rough grinding of steel. Research limitations/implications: The results of the tests indicate the need to continue research in order to optimize the composition of composites in terms of operating parameters of friction nodes in broadly understood aviation. Originality/value: The analysed literature did not find any studies on the impact of the addition of carbon nanotubes on epoxy resins based on bisphenol A/F. Due to the wide scope of application of such resins, the properties of such composite materials in which carbon nanotubes are the reinforcing phase have been investigated.

Preparation and tribological properties of the N-containing heterocyclic borate esters and Cu microparticles as lubricant additives in base oil

2017 ◽  
Vol 29 (6) ◽  
pp. 395-409 ◽  
Author(s):  
Mengnan Qu ◽  
Yali Yao ◽  
Jinmei He ◽  
Xuerui Ma ◽  
Shanshan Liu ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Lubricant Additives ◽  
Base Oil ◽  
Borate Esters

scholarly journals Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

RSC Advances ◽  
2017 ◽  
Vol 7 (64) ◽  
pp. 40295-40302 ◽  
Author(s):  
Numan Salah ◽  
M. Sh. Abdel-wahab ◽  
Ahmed Alshahrie ◽  
Najlaa D. Alharbi ◽  
Zishan H. Khan
Keyword(s):  
Carbon Nanotubes ◽  
Fly Ash ◽  
Lubricant Additives ◽  
Base Oil ◽  
Base Oils ◽  
Oil Fly Ash ◽  
Tribology Performance

CNTs of oil fly ash were found to be suitable as lubricant additives for Aramco base oil.

scholarly journals Competitive Adsorption of Ionic Liquids Versus Friction Modifier and Anti-Wear Additive at Solid/Lubricant Interface—Speciation with Vibrational Sum Frequency Generation Spectroscopy

Lubricants ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 98
Author(s):  
Dien Ngo ◽  
Xin He ◽  
Huimin Luo ◽  
Jun Qu ◽  
Seong H. Kim
Keyword(s):  
Ionic Liquids ◽  
Competitive Adsorption ◽  
Silica Surface ◽  
Sum Frequency Generation ◽  
Lubricant Additives ◽  
Solid Base ◽  
Friction Modifier ◽  
Base Oil ◽  
Sum Frequency ◽  
Frequency Generation

A modern lubricant contains various additives with different functionalities and the interactions or reactions between these additives could induce synergistic or antagonistic effects in tribological performance. In this study, sum frequency generation (SFG) spectroscopy was used to investigate competitive adsorption of lubricant additives at a solid/base oil interface. A silica substrate was used as a model solid surface. The lubricant additives studied here included two oil-soluble ionic liquids (ILs, [N888H][DEHP] and [P8888][DEHP]), an antiwear additive (secondary ZDDP), an organic friction modifier (OFM), and a dispersant (PIBSI). Our results showed that for mixtures of ZDDP and IL in a base oil (PAO4), the silica surface is dominated by the IL molecules. In the cases of base oils containing OFM and IL, the silica/lubricant interface is dominated by OFM over [N888H][DEHP], while it is preferentially occupied by [P8888][DEHP] over OFM. The presence of PIBSI in the mixture of PAO4 and IL leads to the formation of a mixed surface layer at the silica surface with PIBSI as a major component. The SFG results in this investigation provide fundamental insights that are helpful to design the formulation of new lubricant additives of desired properties.

scholarly journals Tribological properties of black phosphorus nanosheets as oil-based lubricant additives for titanium alloy-steel contacts

2020 ◽  
Vol 7 (9) ◽  
pp. 200530
Author(s):  
Qingjuan Wang ◽  
Tingli Hou ◽  
Wei Wang ◽  
Guoliang Zhang ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Alloy Steel ◽  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Liquid Paraffin ◽  
High Energy ◽  
Black Phosphorus ◽  
Lubricant Additives ◽  
Raw Material ◽  
Base Oil

The black phosphorus (BP) powders were prepared by high-energy ball milling with red phosphorus as the raw material, and then the BP nanosheets were obtained by liquid-phase exfoliation. The tribological properties of the BP nanosheets as oil-based lubricant additives were investigated by the ball-on-disc tribometer. Results show that compared with the base oil of liquid paraffin (LP), the coefficient of friction and wear rate of the BP nanosheets as the additives in liquid paraffin (BP-LP) are lower for the same loads. BP-LP lubricants could significantly improve the load-bearing capacity of the base oil for titanium alloy-steel contacts and show excellent friction-reducing and anti-wear properties. The surface morphologies and elemental compositions of the friction pairs were further analysed using an optional microscope, scanning electron microscope and X-ray photoelectron spectroscopy. The lubrication mechanism of BP-LP can be attributed to the synergistic effects between lamellar adsorption and interlayer shear of BP nanosheets.

Nanodiamond-based Nanolubricants: polyester oil based formulations

2012 ◽  
Vol 1452 ◽  
Author(s):  
M. Ivanov ◽  
D. Ivanov ◽  
S.V. Pavlyshko ◽  
A. Koscheev ◽  
Olga A. Shenderova
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Lubricant Additives ◽  
Current Work ◽  
Detonation Nanodiamond ◽  
Base Oil ◽  
Mineral Oils ◽  
Additional Possibility ◽  
Lubricating Properties

ABSTRACTIn the current work tribological properties of different compositions of lubricant additives based on detonation nanodiamond (DND) particles are reported. As compared to the previous findings using polyalphaolefin oil as a base oil for the additives, it is demonstrated that polymer esters are also a valuable base oil for the additive preparation. It is also demonstrated that synergistic compositions of DND with organic molybdenum provide significant improvement of the polyalphaolephin and mineral oils lubricating properties. Treatment of of DND with fluorine containing gases is an additional possibility toward reduced friction and wear of the DND-based nanolubricants.

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