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.

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

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.

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.

Experimental Research on Tribological Properties of Mn0.78Zn0.22Fe2O4 Magnetic Fluids

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Wang Li-jun ◽  
Guo Chu-wen ◽  
Ryuichiro Yamane
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Chemical Properties ◽  
Friction Reduction ◽  
Experimental Investigations ◽  
Wear Scar Diameter ◽  
Base Oil ◽  
Turbine Oil ◽  
Physical And Chemical ◽  
And Chemical Properties

The synthesis and application of nanometer-sized particles have received considerable attention in recent years because of their different physical and chemical properties from those of the bulk materials or individual molecules; however, few experimental investigations on the tribological properties of lubricating oils with and without nanoferromagnetic particles have been performed. This work investigates the tribological properties of Mn0.78Zn0.22Fe2O4 nanoferromagnetic as additive in 46# turbine oil using a four-ball friction and wear tester. It is shown that the 46# turbine oil containing Mn0.78Zn0.22Fe2O4 nanoparticles has much better friction reduction and antiwear abilities than the base oil. The 46# turbine oil doped with 6wt%Mn0.78Zn0.22Fe2O4 nanoparticles show the best tribological properties among the tested oil samples, and PB value is increased by 26%, and the decreasing percentage of wear scar diameter is 25.45% compared to base oil.

scholarly journals Effect of temperature and mating pair on tribological properties of DLC and GLC coatings under high pressure lubricated by MoDTC and ZDDP

Friction ◽  
2020 ◽  
Author(s):  
Kang Liu ◽  
Jia-jie Kang ◽  
Guang-an Zhang ◽  
Zhi-bin Lu ◽  
Wen Yue
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Base Oil ◽  
Two Temperatures ◽  
Friction And Wear Properties ◽  
Lubrication Conditions ◽  
Better Than

AbstractDiamond-like carbon (DLC) and graphite-like carbon (GLC) coatings have good prospects for improving the surface properties of engine parts. However, further understanding is needed on the effect of working conditions on tribological behaviors. In this study, GLC and two types of DLC coatings were deposited on GCr15 substrate for investigation. The friction and wear properties of self-mated and steel-mated pairs were evaluated. Two temperatures (25 and 90 °C), three lubrication conditions (base oil, molybdenum dithiocarbamate (MoDTC)-containing oil, MoDTC+zinc dialkyldithiophosphate (ZDDP)-containing oil), and high Hertz contact stress (2.41 GPa) were applied in the experiments. The results showed that high temperature promoted the effect of ZDDP on steel-mated pairs, but increased wear under base oil lubrication. The increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO3 and β-FeMoO4. It was also found that in most cases, the tribological properties of self-mated pairs were better than those of steel-mated pairs.

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 Tribological properties of synthetic base oil containing polyhedral oligomeric silsesquioxane grafted graphene oxide

RSC Advances ◽  
2018 ◽  
Vol 8 (42) ◽  
pp. 23606-23614 ◽  
Author(s):  
Bo Yu ◽  
Kai Wang ◽  
Yiwen Hu ◽  
Feng Nan ◽  
Jibin Pu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Lubricating Oil ◽  
Wear Performance ◽  
Base Oil ◽  
Oligomeric Silsesquioxane

The dispersion of graphene-based materials in lubricating oil is a prerequisite for improving its friction and wear performance.

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 Viscosity and Tribology of Copper Oxide Nanofluids

2008 ◽  
Author(s):  
A. Hernandez Battez ◽  
J. L. Viesca Rodriguez ◽  
R. Gonzalez Rodriguez ◽  
J. E. Fernandez Rico
Keyword(s):  
Copper Oxide ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Base Oil ◽  
Oil Additives ◽  
Wear Reduction ◽  
Reduction Characteristics

Nanofluids, a term proposed by Choi in 1995 [1], are composites consisting of solid nanoparticles with sizes varying generally from 1 to 100 nm dispersed in a liquid. Numerous nanoparticles used as oil additives have been investigated in recent years [2–7]. Results show that they deposit on the rubbing surface and improve the tribological properties of the base oil, displaying good friction and wear reduction characteristics even at concentrations below 2%wt.

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.

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].

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