Additive Effect of Carbon Nanohorn on Grease Lubrication Properties

Kobayashi, Kazunobu; Hironaka, Seiichiro; Tanaka, Akihiro; Umeda, Kazunori; Iijima, Sumio; Yudasaka, Masako; Kasuya, D.; Suzuki, Masahiro

doi:10.1627/jpi.48.121

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…The superior tribological properties of CNTs have been attributed to their unique structure and dimension, which allows them to be easily active in the contact area and reduce interfacial friction. Kobayashi et al compared the tribological properties of greases containing carbon materials like graphite, cluster diamond with the grease having carbon nanohorn as extreme pressure additive and found that all carbon material containing greases resulted in improved friction and wear behavior of lithium-based grease (Kobayashi et al, 2005). Cursaru et al reported that Cobased single-walled carbon nanotubes (SWCNTs) could be used as an additive for mineral base oils with friction reduction, and a synergistic effect can be observed with SWCNTs and commercial lubricant additives (Cursaru et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Novel Multi-Walled Carbon Nanotubes and Phosphorus Containing Ionic Liquid Hybrids in Grease

Vyavhare

Aswath

2019

Front. Mech. Eng.

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Section: Introductionmentioning

confidence: 99%

Tribological Properties of Novel Multi-Walled Carbon Nanotubes and Phosphorus Containing Ionic Liquid Hybrids in Grease

Vyavhare

Aswath

2019

Front. Mech. Eng.

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“…The improvement in friction and wear for diester grease with 5 wt% fullerene were comparable to those for graphite and MoS 2 . CNHs doped grease exhibited a good load carrying capacity 2) . Its wear resistance performance was, however, less remarkable unless the CNHs are heat-treated 2) .…”

Section: Introductionmentioning

confidence: 98%

“…CNHs doped grease exhibited a good load carrying capacity 2) . Its wear resistance performance was, however, less remarkable unless the CNHs are heat-treated 2) . The CNTs exhibit extraordinary high strength and unique electrical conductive properties, and is also an efficient heat conductor [3][4][5] .…”

Section: Introductionmentioning

confidence: 98%

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Lubricating Characteristic of Grease Composites with CNT Additive

et al. 2011

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The friction at high speed and high pressure tends to cause the lowering of grease stickiness because the frictional heating occurs at the sliding surface, which will bring to the degradation of lubricity. In order to improve the lubricity, carbon nanotubes (CNTs), which has excellent heat conductivity, was added as an additive into the different types of greases. Two kinds of the CNTs, which were synthesized by a floating catalyst method at different annealing temperatures, were used. The sliding experiments were conducted to study the tribological performance of the grease composites by varying the added amounts of CNTs and were compared to the original greases. As a result, it was found that the CNTs improved both the friction and the wear properties. The optimum content of the CNTs in the grease composites was 0.3 mass%.

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“…Furthermore, it was found that CNTs-based composites exhibit lower friction coefficient and excellent antiwear properties compared with pure base lubricant. [53][54][55][56][57][58][59] To improve the self-lubricant property, it is crucial that CNTs are homogeneously dispersed in base lubricant. However, some previous reports about the tribological behaviors of CNTs just used CNTs as reinforcements for wear parts, and only restricted in using CNTs as solid lubricant or simply dispersed in base lubricant via physical blending to investigate its tribological property.…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte‐grafted carbon nanotubes: Synthesis, reversible phase‐transition behavior, and tribological properties as lubricant additives

Pei

Xia

Liu

et al. 2008

J. Polym. Sci. A Polym. Chem.

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A novel polyelectrolyte-grafted multiwalled carbon nanotubes (MWCNTsg-PILs) which possesses a hard backbone of MWCNTs and a soft shell of brush-like poly (ionic liquids) (PILs) has been synthesized via the surface atom transfer radical polymerization (ATRP). Chemical structure and the grafted PILs quantities of MWCNTs-g-PILs were determined by FTIR, TGA, and XPS. TEM and FE-SEM observations indicate that the nanotubes were coated with a PILs layer, exhibiting core-shell nanostructures with the PILs chains as the brush-like or hairy shell and the MWCNTs as the hard backbone. Furthermore, the effect of counter-anions on the solubility of MWCNTs-g-PILs was investigated. The results indicate that relative solubility of MWCNTs-g-PILs in various solvents could be switched by anion exchange. This tunable solubility results in the formation of the cycle of reversible phase-transition. Tribological property of MWCNTs-g-PILs as additives in base lubricant 1methyl-3-butylimidaaolium hexafluorophosphate (LP104) was evaluated using an Optimol SRV oscillating friction and wear tester, confirming that MWCNTs-g-PILs are the excellent antiwear and friction-reducing additives, which can amend the tribological properties of base lubricant significantly. This is attributed to the good dispersibility and core-shell structure of MWCNTs-g-PILs. These results reported in this work may open primarily toward constructing a bridge among carbon nanotues (CNTs), ILs, and lubricant additives and secondarily to prove that CNTs (modified CNTs) as lubricant additives are promising candidates. V

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Additive Effect of Carbon Nanohorn on Grease Lubrication Properties

Cited by 13 publications

References 10 publications

Tribological Properties of Novel Multi-Walled Carbon Nanotubes and Phosphorus Containing Ionic Liquid Hybrids in Grease

Tribological Properties of Novel Multi-Walled Carbon Nanotubes and Phosphorus Containing Ionic Liquid Hybrids in Grease

Lubricating Characteristic of Grease Composites with CNT Additive

Polyelectrolyte‐grafted carbon nanotubes: Synthesis, reversible phase‐transition behavior, and tribological properties as lubricant additives

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