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

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.

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

Friction ◽

10.1007/s40544-019-0347-6 ◽

2020 ◽

Vol 9 (2) ◽

pp. 332-343 ◽

Cited By ~ 2

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.

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

Lubrication Science ◽

10.1002/ls.1375 ◽

2017 ◽

Vol 29 (6) ◽

pp. 395-409 ◽

Cited By ~ 4

Author(s):

Mengnan Qu ◽

Yali Yao ◽

Jinmei He ◽

Xuerui Ma ◽

Shanshan Liu ◽

...

Keyword(s):

Tribological Properties ◽

Lubricant Additives ◽

Base Oil ◽

Borate Esters

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

Royal Society Open Science ◽

10.1098/rsos.200530 ◽

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.

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Nanodiamond-based Nanolubricants: polyester oil based formulations

MRS Proceedings ◽

10.1557/opl.2012.1228 ◽

2012 ◽

Vol 1452 ◽

Cited By ~ 1

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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Carbon Nanotubes and Onions as Lubricant Additives

World Tribology Congress III, Volume 1 ◽

10.1115/wtc2005-63220 ◽

2005 ◽

Cited By ~ 1

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].

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Tribological Properties of SiO2@Cu And SiO2@MoS2 Core-Shell Microspheres As Lubricant Additives

10.21203/rs.3.rs-557731/v1 ◽

2021 ◽

Author(s):

Xiaoliang Ma ◽

Chaoliang Gan ◽

Xiaopeng Li ◽

Yuting Li ◽

Peng Feng ◽

...

Keyword(s):

Tribological Properties ◽

Friction And Wear ◽

Hard Core ◽

Lubricant Additives ◽

Friction Reduction ◽

Wear Volume ◽

Core Shell ◽

Base Oil ◽

Tribological Behaviors ◽

Lubrication Performance

Abstract Herein, core-shell structural SiO2@Cu and SiO2@MoS2 microspheres were prepared using SiO2 as hard core, Cu and MoS2 as shell. As lubricant additives were introduced into base oil (PAO 40), their friction-reduction and wear-resistance were investigated in detail. Comparing with onefold additive (SiO2, Cu and MoS2), such core-shell structure additives can improve the tribological behaviors at the Hertz contact stress range of 1.26 ~ 2.72 GPa (SiO2@Cu reduces the friction and wear up to 32.47% and 67.86% at 2.72 GPa, respectively). Besides, the tribological properties of SiO2@Cu microspheres are superior to that of SiO2@MoS2 (the wear volume was reduced by 48.45% at 2.72 GPa). The excellent tribological behaviors of SiO2@Cu microspheres can be ascribed to its structural advantage, the synergistic effect of hard SiO2 core and Cu shell. The rolling effect of SiO2, easy-shearing and self-repairing of Cu shell offer a synergistic lubrication function and form a dense protection film, thereby contributing to the optimal lubrication performance.

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