Modification of multi-walled carbon nanotubes with fatty acid and their tribological properties as lubricant additive

Chen, C.S.; Chen, X.H.; Xu, Lida; Liu, Yang; Li, W.H.

doi:10.1016/j.carbon.2005.01.044

Cited by 214 publications

(91 citation statements)

References 18 publications

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“…The second step, the hydroxyl modified CNCs (CNC-(OH)n) can be further grafted with the alkyl chains by reaction with equivalent C18 stearic acid in an acidic solution with reflux. After purification, a lube oil additive CNC-(OCOC 18 )n was prepared [6,22]. The suspension of base oil and CNC particles was thoroughly mixed with ultrasound (500 W, 60 Hz) for several hours.…”

Section: Methodsmentioning

confidence: 99%

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Jeng

Huang

Tsai

et al. 2014

Journal of Tribology

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An experimental investigation is performed into the tribological properties of mineral oil lubricants containing carbon nanocapsules (CNCs) additives with various concentrations (wt.%). Friction characteristics and wear behaviors at contact interfaces are examined by the block-on-ring tests, high-resolution transmission electron microscopy (HRTEM), and mapping (MAP) analysis. The results suggest that the addition of CNCs to the mineral oil yields an effective reduction in the friction coefficient at the contact interface. Molecular dynamics (MD) simulations clarify the lubrication mechanism of CNCs at the sliding system, indicating the tribological properties are essentially sensitive to the structural evolutions of CNCs.

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Section: Methodsmentioning

confidence: 99%

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Jeng

Huang

Tsai

et al. 2014

Journal of Tribology

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“…Based on TEM-EELS analysis of the rubbed surfaces they suggested that the carbon particles may stabilise maghemite, a low friction form of iron oxide. Carbon nanotubes have also been investigated as potential boundary lubricant additives and found to reduce significantly both friction and wear [223,224]. In the last few years there has been considerable focus on graphene as a potential lubricant, including its use as an additive dispersed in oil.…”

Section: Nanoparticle Additive Research; 1990 To Presentmentioning

confidence: 99%

Friction Modifier Additives

2015

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The need for energy efficiency is leading to the growing use of additives that reduce friction in thin film boundary and mixed lubrication conditions. Several classes of such friction modifier additive exist, the main ones being organic friction modifiers, functionalised polymers, soluble organo-molybdenum additives and dispersed nanoparticles. All work in different ways. This paper reviews these four main types of lubricant friction modifier additive and outlines their history, research and the mechanisms by which they are currently believed to function. Aspects of their behaviour that are still not yet fully understood are highlighted.

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“…In addition to that, their shape, high aspect ratio and high flexibility rendered them as a promising candidate for solid lubrication or as a lubricant additive in tribological applications. Several studies have proved the ability of CNTs to reduce friction and wear; for example, when used as the reinforcement phase in composites [3][4][5][6][7][8][9], as a protective film [10][11][12][13], solid lubricant [8][9][10]12,14,15], or lubricant additive [16][17][18][19]. Although all of these systems show improvements to a different extent, the tribo-mechanisms inducing these effects are clearly differing and not completely understood.…”

Section: Introductionmentioning

confidence: 99%

Tribo-Mechanisms of Carbon Nanotubes: Friction and Wear Behavior of CNT-Reinforced Nickel Matrix Composites and CNT-Coated Bulk Nickel

2016

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Abstract:In this study, nickel matrix composites reinforced by carbon nanotubes (CNTs) are compared to unreinforced CNT-coated (by drop-casting) bulk nickel samples in terms of their friction and wear behavior, thus gaining significant knowledge regarding the tribological influence of CNTs and the underlying tribo-mechanism. It has been shown that the frictional behavior is mainly influenced by the CNTs present in the contact zone, as just minor differences in the coefficient of friction between the examined samples can be observed during run-in. Consequently, the known effect of a refined microstructure, thus leading to an increased hardness of the CNT reinforced samples, seems to play a minor role in friction reduction compared to the solid lubrication effect induced by the CNTs. Additionally, a continuous supply of CNTs to the tribo-contact can be considered isolated for the reinforced composites, which provides a long-term friction reduction compared to the CNT-coated sample. Finally, it can be stated that CNTs can withstand the accumulated stress retaining to some extent their structural state for the given strain. A comprehensive study performed by complementary analytical methods is employed, including Raman spectroscopy and scanning electron microscopy to understand the involved friction and wear mechanisms.

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Modification of multi-walled carbon nanotubes with fatty acid and their tribological properties as lubricant additive

Cited by 214 publications

References 18 publications

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Friction Modifier Additives

Tribo-Mechanisms of Carbon Nanotubes: Friction and Wear Behavior of CNT-Reinforced Nickel Matrix Composites and CNT-Coated Bulk Nickel

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