One-step rapid fabrication of high-purity onion-like carbons as efficient lubrication additives

He, Chunnian; Yan, Honghao; Li, Xiaojie; Wang, Xiaohong

doi:10.1007/s10853-020-05311-0

Cited by 13 publications

(6 citation statements)

References 40 publications

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“…Lubricant additives are of vital importance in improving the tribological behaviors of base oils, especially the antiwear and friction-reducing properties. , With increasing requirements of industrial standards and energy sustainability, carbon-based nanomaterials (including carbon nanotubes, − graphene or graphene oxide, − fullerene, , and onion-like carbon nanoparticles − ) are widely recognized as one of the promising and attractive candidates for eco-friendly and high-performance additives by reason for their stable chemical inertness and thermostability, extreme mechanical strength, outstanding self-lubricating function, and excellent load-bearing capacity. Astonishingly, when only a spot of carbon-based nanoadditives are blended in lubricants, enhanced friction-reducing and antiwear properties can be achieved, which notably reduces energy losses and promotes the durability of mechanical components .…”

Section: Introductionmentioning

confidence: 99%

Integration of Functionalized Polyelectrolytes onto Carbon Dots for Synergistically Improving the Tribological Properties of Polyethylene Glycol

Mou

Zhao

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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In this work, we carefully designed and synthesized a series of novel polyelectrolyte-functionalized carbon dots (CDs-PEI-X) by a facile and reversible phase transfer method based on the protonation reaction and anion exchange process executed on the surface of polyethylenimine-grafted CDs (CDs-PEI), where X denotes the anionic moieties of polyelectrolyte shells including hexafluorophosphate (PF 6 − ), bis(trifluoromethane)sulfonimide (NTf 2 − ), oleate (OL − ), and bis(salicylato)borate (BScB − ), respectively. Attributed to the favorable compatibility of these anions and polyethylene glycol (PEG) molecules, the hydrophobic CDs-PEI-X displayed excellent dispersibility and long-term stability in PEG200 base oil. Subsequently, the tribological behaviors of CDs-PEI-X as the lubricant additives of PEG200 were systematically investigated. It was proved that the anionic moieties of the polyelectrolyte shells of CDs-PEI-X played a crucial role in regulating their tribological behaviors. Particularly, CDs-PEI-OL was confirmed as an optimal additive, exhibiting the best lubricity, outstanding load-bearing capacity, long service life, and remarkable operational stability under boundary lubrication regime. Based on the tribological evaluations and worn surface analyses, the lubrication mechanism of CDs-PEI-OL was mainly attributed to the formation of the organic−inorganic hybrid adsorption film, the protective tribofilm, and its nanolubrication functions as scrollable "ball-bearing", i.e., the synergistic lubrication effects of surface polyelectrolyte shells and carbon cores. This study provides a feasible and versatile strategy to rapidly and effectively tailor the surface chemistry of CDs and discloses the essential contribution of carbon cores and surface groups on the lubrication process, which facilitates the development of advanced CDs-based nanolubricant additives.

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Section: Introductionmentioning

confidence: 99%

Integration of Functionalized Polyelectrolytes onto Carbon Dots for Synergistically Improving the Tribological Properties of Polyethylene Glycol

Mou

Zhao

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…He et al [194] prepared onion-like carbon nanoparticle by a short period of gas bursting, and the as-obtained onion-like carbon nanoparticle as the lubricant additive greatly reduced friction and wear because the exfoliated GP nanosheets can form a protective film with desired friction reduction and antiwear properties. Luo et al [195] obtained an onion structure by the spontaneous combination of MoS 2 nanosheets through laser irradiation.…”

Section: Onionmentioning

confidence: 99%

The Current Situation and Future Direction of Nanoparticles Lubricant Additives in China

et al. 2022

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Nanoparticles as lubricant additives demonstrate powerful friction reduction and antiwear properties and are potential alternatives to traditional additives in line with green and environmentally friendly requirements. However, the vast majority of currently available research focuses on the tribological properties of various nanoparticles in base oils at laboratory, which has a large gap with their application in engineering. To cope with the rapid economic and industrial development in China, there is a need to improve the tribological properties of nanoparticles. This paper highlights the current status and development trend of nanoparticles as lubricant additives in China. The factors influencing the tribological properties of nanoparticles, such as their composition, particle size and morphology, as well as the base stocks and their combination with other additives, are summarized. Furthermore, the research progress in the lubrication mechanism of nanoparticles is discussed, and the issues concerning the application of nanoparticles as lubricant additives as well as their future directions are discussed. This review is expected to provide an impetus to guide the design of high-performance, fully formulated lubricant systems containing nanoparticles as the lubricant additive.

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“…Nano-onion-like fullerene, a member of the zero-dimensional fullerene family, is commonly referred to as onion-like carbon (OLC), which exhibits near-spherical structures composed of multiple layers of closed fullerene carbon shells . Due to its unique structural characteristics, OLC possesses a high specific surface area and mechanical strength, both of which are conducive to its lubricating effect. − He et al prepared high-purity and high-reproducibility OLC via a one-step gas-phase explosion method, which improves the lubricating ability of 150SN mineral oil as a lubricant additive . Wang et al incorporated OLC as an additive into calcium sulfonate complex grease and found that the lubricating performance of the grease improved significantly with 0.10 wt % addition, reducing the average COF and wear volume by 31.4 and 70.0%, respectively .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Garlic Oil-Functionalized Onion-Like Carbon Nanoparticles as Effective Nanoadditives for Improved Lubricating Performance

Zhang,

Xue,

Wang

et al. 2024

ACS Appl. Nano Mater.

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One-step rapid fabrication of high-purity onion-like carbons as efficient lubrication additives

Cited by 13 publications

References 40 publications

Integration of Functionalized Polyelectrolytes onto Carbon Dots for Synergistically Improving the Tribological Properties of Polyethylene Glycol

Integration of Functionalized Polyelectrolytes onto Carbon Dots for Synergistically Improving the Tribological Properties of Polyethylene Glycol

The Current Situation and Future Direction of Nanoparticles Lubricant Additives in China

Fabrication of Garlic Oil-Functionalized Onion-Like Carbon Nanoparticles as Effective Nanoadditives for Improved Lubricating Performance

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