Superlubricity achieved by carbon quantum dots in ionic liquid

Ma, Wei; Gong, Zhenbin; Gao, Kaixiong; Li, Qiang; Zhang, Junyan; Yu, Shurong

doi:10.1016/j.matlet.2017.02.135

Cited by 66 publications

(30 citation statements)

References 25 publications

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“…Zhang et al [27] synthetized a novel N/B-codoped nanomaterial (carbon dots/ionic liquid, CD/IL), and found that the anti-wear and friction-reducing properties of polyethylene glycol (PEG) were improved with the addition of CD/IL particles. Ma et al [28] fabricated novel CQD and IL nanoparticles and discovered that the tribological behavior of these nanoparticles affects the lubrication of PEG, similar to the results found by Zhang [27]. Wang et al [29] used a one-pot pyrolysis method to synthesize IL (1-aminopropyl-3methylimidazolium bromide)-capped carbon dot particles.…”

Section: Introductionmentioning

confidence: 69%

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

Dearn

Wang

et al. 2019

Friction

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A novel green lubricating oil additive (carbon quantum dot (CQD) particle-doped nickel (Ni-CQD)) was synthesized from citric acid and nickel acetate. The effects of CQD and Ni-CQD nanoparticles on the tribological behaviors of polyethylene glycol (PEG200) were investigated under different loads and reciprocation speeds. The results indicate that CQD and Ni-CQD particles can both enhance the lubrication properties of PEG200. However, the Ni-CQD nanoparticles enhanced the lubrication properties more than the plain CQD particles did. The average friction coefficient and wear rate of PEG200 containing 2 wt% Ni-CQDs were reduced by 35.5% and 36.4%, respectively, compared to PEG200 containing pure CQDs under a load of 8 N and reciprocation speed of 25 mm/s over 60 min. The friction and wear mechanisms are attributed to the fact that friction induces the Ni-CQDs to participate in the formation of a tribofilm, resulting in a low friction coefficient and wear rate.

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Section: Introductionmentioning

confidence: 69%

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

Dearn

Wang

et al. 2019

Friction

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“…However, superlubricity of multiple nanoparticles shows dependence on the volume content rather than on directionality. With an appropriate concentration of 3.6% ionic liquid (IL)‐modified carbon quantum dot (CQD) nanoparticles, a superlow friction of ≈0.006 was found, which was considerably lower than other IL‐modified CQD contents (concentrations of 0%, 0.98%, and 8.2%) . The superlow friction performance is believed to relate to the sphere‐in‐shell architecture of the IL‐modified CQD nanoparticles, but correlative lubricating mechanisms need to be further explored.…”

Section: D Nanomaterialsmentioning

confidence: 99%

“…a) Schematic diagram of the assembling process of ionic liquid‐modified carbon quantum dots; b) TEM image of the as‐prepared nanoparticles; c) distribution of particle size; d) selected area electron diffraction pattern for CQD nanoparticles. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: D Nanomaterialsmentioning

confidence: 99%

Nanomaterials in Superlubricity

Zhai

Zhou

2019

Adv Funct Materials

205

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The vanishing friction, known as superlubricity, is potentially a significant performance indicator in the development of nanostructured materials and has become increasingly important for realizing energy saving and extending the life of mechanical components. Herein, a systematic review of recent progress in nanomaterials for achieving the superlubric state is provided, beginning with a brief introduction of nanostructured materials in superlubricity and its wide potential applications. Subsequently, a detailed discussion of experimental and simulation works on the different spatial structures of nanomaterials associated with size effects ranging from 0D to 3D nanostructures is given, with an emphasis on solid and liquid superlubricity. Finally, this work concludes with perspectives on the challenges and future directions for developing nanomaterials in the field of superlubricity.

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“…The tribological properties of RTILs, such as the friction reduction, anti-wear, and anticorrosion properties, have been well explored (Somers et al, 2013;Fan et al, 2014;Saurin et al, 2016;Li et al, 2017). However, studies of the superlubricity of RTILs have only been performed under a very low normal load (0.02 N) in combination with carbon quantum dots (Ma et al, 2017), or at the microscale between a SiO 2 /graphite tribopair . Therefore, the macroscale superlubricity of RTILs under high normal loads must be investigated.…”

Section: Rtil Lubricantsmentioning

confidence: 99%

Macroscale Superlubricity Achieved With Various Liquid Molecules: A Review

Luo

2019

Front. Mech. Eng.

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Superlubricity is generally classified as solid superlubricity and liquid superlubricity according to the lubricants involved at the interfaces, and is a popular research topic in tribology, which is closely linked to energy dissipation. Significant advancements in both experimental studies and theoretical analysis have been made regarding superlubricity in the past two decades. Compared with solid superlubricity, liquid superlubricity has many advantages; e.g., it is more easily achieved at the macroscale and less sensitive to the surface smoothness and atmospheric conditions. In the present study, the advancements in liquid superlubricity at the macroscale are reviewed, and the corresponding mechanisms for various types of liquid lubricants are discussed. This investigation is important for engineering traditional mechanical lubricating systems. Finally, the issues regarding the liquid superlubricity mechanism and the future development of liquid superlubricity are addressed.

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Superlubricity achieved by carbon quantum dots in ionic liquid

Cited by 66 publications

References 25 publications

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

Nanomaterials in Superlubricity

Macroscale Superlubricity Achieved With Various Liquid Molecules: A Review

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