Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 2. Formation of Tribo‐Polymer Films during Boundary Sliding Friction in the Presence of Fullerene C<sub>60</sub>

Гинзбург, Б. М.; Kireenko, O. F.; Шепелевский, А. А.; Shibaev, L. A.; Tochil’nikov, D. G.; Leksovskii, A. M.

doi:10.1081/mb-200044604

Cited by 21 publications

(6 citation statements)

References 12 publications

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“…The authors reported that the improvement in wear was due either to the formation of a transfer film in the contact area or to the C60 clusters acting as "tiny ball bearings". Ginzburg et al [221] analysed the tribofilm formed by fullerene using mass spectrometry, wide angle X-ray diffraction and TEM. They proposed that the film consists of a network of fullerene molecules linked by polyolefin chains formed during rubbing.…”

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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Section: Nanoparticle Additive Research; 1990 To Presentmentioning

confidence: 99%

Friction Modifier Additives

2015

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“…Although C 60 fullerene additives have been shown to reduce friction and wear under specific conditions [3][4][5][6], their action as molecular ball bearings has been widely disputed [7,8] and their overall performance as potential lubricant additives has been somewhat disappointing [1,7,8]. However, larger carbon nanoparticle additives have shown more promise with regard to boundary friction and wear reduction, specifically carbon nanodiamonds (CND) and carbon nanoonions (CNO) [1].…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium Molecular Dynamics Investigation of the Reduction in Friction and Wear by Carbon Nanoparticles Between Iron Surfaces

et al. 2016

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For the successful development and application of novel lubricant additives, a full understanding of their tribological behaviour at the nanoscale is required, but this can be difficult to obtain experimentally. In this study, nonequilibrium molecular dynamics simulations are used to examine the friction and wear reduction mechanisms of promising carbon nanoparticle friction modifier additives. Specifically, the friction and wear behaviour of carbon nanodiamonds (CNDs) and carbon nano-onions (CNOs) confined between a-iron slabs is probed at a range of coverages, pressures, and sliding velocities. At high coverage and low pressure, the nanoparticles do not indent into the a-iron slabs during sliding, leading to zero wear and a low friction coefficient. At low coverage and high pressure, the nanoparticles indent into, and plough through the slabs during sliding, leading to atomic-scale wear and a much higher friction coefficient. This contribution to the friction coefficient is well predicted by an expression developed for macroscopic indentation by Bowden and Tabor. Even at the highest pressures and lowest coverages simulated, both nanoparticles were able to maintain separation of the opposing slabs and reduce friction by approximately 75 % compared to when no nanoparticle was present, which agrees well with experimental observations. CNO nanoparticles yielded a lower indentation (wear) depth and lower friction coefficients at equal coverage and pressure with respect to CND, making them more attractive friction modifier additives. Potential changes in behaviour on harder and softer surfaces are also discussed, together with the implications that these results have in terms of the application of the studied nanoparticles as lubricants additives.

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“…Special attention was given to systems based on atactic, free-radical poly(methyl methacrylate) (PMMA) and atactic free-radical and anionic polystyrene (PS). The results of the PS studies appear to be a key to understanding the mechanisms of the beneficial influence of addition of fullerene C 60 on antifriction, antiwear, and antiscoring properties of liquid lubricant oils and greases (Part II [2] ).…”

Section: Introductionmentioning

confidence: 97%

Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 3. Features of the Mechanism of Thermal Degradation of Poly‐(N‐Vinyl‐Pyrrolidone) and Its Compositions with Fullerene C₆₀

Shibaev

Melenevskaya

Гинзбург

et al. 2008

Journal of Macromolecular Science, Part B

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By mass-spectrometric thermal analysis (MTA) the thermochemical features of poly(Nvinyl pyrrolidone) (PVP) and its compositions with fullerene C 60 were studied. The mechanism of PVP thermal degradation was investigated; in particular the nature of the low-temperature degradation (between 75 and 3008C) accompanied by output of pyrrolidone was explained as well as the influence of fullerene C 60 on this mechanism. It was shown that during thermal degradation of copolymer PVP-C 60 , there is a disappearance of the low-temperature peaks of the output of pyrrolidone that is interpreted as an increase of the thermal stability of N-vinyl-pyrrolidone fragments in this product in comparison with their thermal stability in pure PVP.

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Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 2. Formation of Tribo‐Polymer Films during Boundary Sliding Friction in the Presence of Fullerene C₆₀

Cited by 21 publications

References 12 publications

Friction Modifier Additives

Friction Modifier Additives

Nonequilibrium Molecular Dynamics Investigation of the Reduction in Friction and Wear by Carbon Nanoparticles Between Iron Surfaces

Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 3. Features of the Mechanism of Thermal Degradation of Poly‐(N‐Vinyl‐Pyrrolidone) and Its Compositions with Fullerene C₆₀

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Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 2. Formation of Tribo‐Polymer Films during Boundary Sliding Friction in the Presence of Fullerene C60

Cited by 21 publications

References 12 publications

Friction Modifier Additives

Friction Modifier Additives

Nonequilibrium Molecular Dynamics Investigation of the Reduction in Friction and Wear by Carbon Nanoparticles Between Iron Surfaces

Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 3. Features of the Mechanism of Thermal Degradation of Poly‐(N‐Vinyl‐Pyrrolidone) and Its Compositions with Fullerene C60

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Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 2. Formation of Tribo‐Polymer Films during Boundary Sliding Friction in the Presence of Fullerene C₆₀

Thermal and Tribological Properties of Fullerene‐Containing Composite Systems. Part 3. Features of the Mechanism of Thermal Degradation of Poly‐(N‐Vinyl‐Pyrrolidone) and Its Compositions with Fullerene C₆₀