Tuning of the hydrophilicity and hydrophobicity of nitrogen doped carbon dots: A facile approach towards high efficient lubricant nanoadditives

Shang, Wangji; Ye, Mengting; Cai, Tao; Zhao, Lina; Zhang, Yunxiao; Liú, Dan; Liu, Shenggao

doi:10.1016/j.molliq.2018.06.042

Cited by 67 publications

(24 citation statements)

References 41 publications

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“…However, the increase in the contact area was lower than that of the load. In comparison with previously reported carbon/graphene quantum dots [57][58][59], colloidal polystyrene-carbon nanotubes [60], and graphene oxides [61,62], BPQDs possess a much better loadsupporting capacity under identical experimental conditions, even when using a small additive c of 0.005 wt%. For comparison purposes, BP powder was also utilized as additive of the base liquid to further highlight the superior performance of BPQDs as additives.…”

Section: Tribological Properties Of Bpqds As Waterbased Additivesmentioning

confidence: 53%

Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

et al. 2020

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Black phosphorus quantum dots (BPQDs), obtained via a typical solution-based top-down method, were used as water-based lubricant additives. BPQDs exhibited remarkable friction reduction and anti-wear properties even at the ultra-low concentration of 0.005 wt%, which reduced the friction coefficient and wear volume of the base liquid by 32.3% and 56.4%, respectively. In addition, the load-supporting capacity of the base liquid increased from 120 N to over 300 N. BPQDs-based additives exhibited a relatively long lifetime at a relatively high load of 80 N. The performance of BPQDs considerably exceeded that of the BP; this may be attributed to their small and uniform particle size, good dispersion stability in water, and high reactivity at the frictional surfaces. The results of the surface wear resistance analysis demonstrated that a robust tribochemical film with a thickness of approximately 90 nm was formed on the rubbing surface lubricated with 0.005 wt% of BPQDs dispersion. Moreover, the film served as a direct evidence of the excellent tribological performance of BPQDs.

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Section: Tribological Properties Of Bpqds As Waterbased Additivesmentioning

confidence: 53%

Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

et al. 2020

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“…The two-dimensional materials mainly include graphene [116], boron nitride [117], MoS 2 [118], and other 2D materials [119][120][121]. The other materials concentrate on metallic or nonmetallic nanoparticles [122,123], metallic or nonmetallic oxides [124,125], and inorganic nanocomposites [126]. Therefore, this section is divided into two parts, namely two-dimensional materials and other dimensional materials.…”

Section: Inorganic Additivementioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

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The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

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“…The above phenomenons were collectively responsible for the excellent tribological performance of the prepared CQDs. Shang et al [154,155] also obtained a similar conclusion by integrating and analyzing the corresponding wear scar surface analysis results, which were derived from the XPS, Raman, and SEM-EDS measurements, respectively. Table 1 shows the summary of various studies that have involved the particle diameters, lubricating base oils, additive concentrations, tribotest modes and conditions, surface analysis techniques, and lubrication mechanisms of commonly used CQDs-based additives.…”

Section: Polishing Effectmentioning

confidence: 67%

“…The synergistic lubricating effect was primarily accounted for the excellent tribological behaviors of CQDs-IL, that is, the nanolubrication effect of CQDs and the film-forming effect of ionic liquids collectively protected the rubbing surfaces against friction and wear. Meanwhile, Shang's group [154] also prepared a type of N-doped hydrophilic CQDs (N-CQDs) by directly pyrolyzing urea and citric acid; then, the N-CQDs were utilized as lubricant additives of PEG. The friction-reducing and anti-wear behaviors of PEG can be dramatically improved under boundary lubrication conditions, attributing to that N-CQDs could easily enter into the rubbing surfaces and react with the metallic surface to form a boundary lubricating thin film, thereby decreasing the friction and wear.…”

Section: Cqds As Additives In Pegmentioning

confidence: 99%

Applications of carbon quantum dots in lubricant additives: a review

Tang

Zhang

2021

J Mater Sci

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Advances in lubricants are vital to the pursuit of energy efficiency and sustainable development. It is well known that the essence of lubricating oil is lubricant additives, especially the friction-reducing and anti-wear additives. Carbon quantum dots (CQDs), a novel zero-dimensional carbon-based nanomaterial, have attained growing expectations in material and chemical sciences because of their extraordinary properties such as low toxicity and environmentally friendly, high chemical and thermal stability, and good designability. Since their discovery, CQDs have shown great potential in many applications including sensors, medicine, photovoltaic devices, biology, and tribology. The latest application of CQDs as the high-performance friction-reducing and antiwear additives has garnered increasing attention. With the in-depth study, CQDs have gradually exhibited their excellent tribological properties, especially acted as additives in lubricating base oils. This paper has reviewed the progress in the research and development of CQDs-based lubricant additives by introducing lots of successful applications of CQDs-based additives in the present work and then highlighted the friction-reducing and anti-wear property, superiority, as well as the lubrication mechanism of CQDs as an additive, along with some discussion on challenges and perspectives in this significant and promising field. Finally, we offered a series of suggestions for developing the next-generation high-performance CQDs-based lubricant additives.

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Tuning of the hydrophilicity and hydrophobicity of nitrogen doped carbon dots: A facile approach towards high efficient lubricant nanoadditives

Cited by 67 publications

References 41 publications

Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

A review of recent advances in tribology

Applications of carbon quantum dots in lubricant additives: a review

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