A review of current understanding in tribochemical reactions involving lubricant additives

Chen, Yan; Renner, Peter; Liang, Hong

doi:10.1007/s40544-022-0637-2

Cited by 34 publications

(22 citation statements)

References 179 publications

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“…Among them, C–O represented the organic part in the tribofilm, part of which was generated in the tribochemical reaction, and the others derived from the deposition of B,N@PCNS . The C–C corresponded to amorphous carbon with sp 3 hybridization; on the one hand, the B,N@PCNS possessed pretty poor crystallinity and presented an amorphous feature, and on the other hand, the products produced in the tribochemical reaction usually emerged in an amorphous state, which was in accordance with the conclusion from the Raman mappings . C–Fe originated from the cementite in the steel substrate .…”

Section: Resultssupporting

confidence: 77%

Boron–Nitrogen Codoped Carbon Nanosheets as Oil-Based Lubricant Additives for Antioxidation, Antiwear, and Friction Reduction

Zhang

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Leveraging the advantages of shape retention and atomic reconstruction during the carbonizing of crystalline precursors, we demonstrated an efficient strategy to manufacture boron–nitrogen codoped carbon nanosheets (B,N@PCNS) by virtue of pyrolysis combining metal–organic framework (MOF) precursors and B-dopants. Through the regulation of the ratio between reactants, we implemented an ultrahigh-surface heteroatomic doping rate of N at 10.44 atom % and B at 5.60 atom % with homogeneous distribution, which significantly enhanced the compatibility between carbon nanosheets and the lubricant oil PAO10, resulting in outstanding dispersion stability. Expectedly, the hybrid oil with 2.0 wt % B,N@PCNS displayed fascinating tribological performances in multiple aspects: it lowered the mean coefficient of friction to 0.088, promoted the load-carrying ability from 100 to 400 N, and diminished the wear loss by 91.3%. What is most laudable was the dramatic antioxidation property brought about by B doping; the unique radical scavenging effect of B atoms can restrain the decomposition of oil molecules, consequently prolonging the oxidative induction time from 15.7 min of PAO10 to exceeding 90 min with B,N@PCNS and promoting the onset oxidative temperature by 31.4 °C. With the aid of Raman mapping and XPS sputtering analysis, we verified that a complex tribochemical reaction occurred between B,N@PCNS and the steel substrate and induced the formation of a robust protective tribofilm composed of iron oxides, boron oxides, iron borides, and an amorphous carbonaceous compound. Among these, the rigid boron oxides and iron borides pervaded the whole tribofilm and strengthened it as a reinforcing phase, accounting for the tremendous boost in load-carrying and antiwear performances. This work not only puts forward a novel path in the synthesis of multidoped carbon nanosheets with tailored properties but also broadens the cognition of the tribochemical reaction via intuitive characterization.

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Section: Resultssupporting

confidence: 77%

Boron–Nitrogen Codoped Carbon Nanosheets as Oil-Based Lubricant Additives for Antioxidation, Antiwear, and Friction Reduction

Zhang

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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“…At present, wind power bearings are widely used in timing, quantitative lubricant addition, lubricant replacement, and other methods; however, these methods still have shortcomings. For example, adding lubricant at regular intervals and in quantities can lead to insufficient or excessive lubrication of the bearings, which in turn can lead to wear and tear of the bearings, chemical reactions, and contamination caused by overflow of lubricant [133,134]. Therefore, finding a suitable lubrication method improves the bearing lubrication effect and extends the bearing life.…”

Section: Gas-lubricationmentioning

confidence: 99%

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Peng,

Zhao,

Shangguan

et al. 2023

Coatings

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With the significant penetration of wind generation, wind turbines require higher and higher lubrication performance for bearings. To improve the lubrication performance of wind power bearings, this study takes wind power bearings as the research object and comprehensively analyzes the wear forms of wind power bearings as well as intelligent lubrication methods. Firstly, the main roles and wear forms of wind turbine bearings are sorted out and analyzed. Secondly, the common lubrication problems of wind power bearings are analyzed from the bearing grease selection, lubrication mode, and lubrication status, highlighting the important influence of lubrication on bearings. Thirdly, the wind turbine bearing wisdom lubrication method research and organization, mainly including the wind power generation bearing lubrication materials, lubrication devices and monitoring methods, and other issues of research and analysis. Finally, current challenges and future development directions are summarized, which are designed to provide theoretical reference and technical support for the related research and engineering practice in the field of wind power engineering.

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“…When ZDDP and MO interacted chemically, it was evident that MO considerably increased ZDDP's antioxidant capacity while lowering its anti-wear capability [264]. Additionally, in the 2000s, ionic liquids (ILs) and nanoparticles (NPs), two new categories of lubricant additives, were developed [265]. The results of many investigations that were carried out to examine the impact of adding nanoparticles to mineral oils and biolubricants are summarized in Table 7.…”

Section: Developing Advanced Lubricantsmentioning

confidence: 99%

Technical Implications of the Use of Biofuels in Agricultural and Industrial Compression-Ignition Engines with a Special Focus on the Interactions with (Bio)lubricants

Piri,

Renzi,

Bietresato

2023

Energies

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The environmental sustainability of agricultural and industrial vehicles, as well as of the transportation sector, represents one of the most critical challenges to the sustainable development of a nation. In recent decades, compression-ignition engines have been widely used in on-road and off-road vehicles due to their better fuel economy, autonomy, compactness, and mechanical performance (spec. the high torque values). Due to the consistent environmental impact of fossil fuels, scientists are searching for alternative energy sources while preserving the beneficial features of diesel engines. The utilization of blends of diesel fuel, biodiesel, and bioethanol fuel (referred to as “ternary blends”) is among the most promising solutions for replacing fossil fuels in the near term, allowing, at the same time, us to continue using existing vehicles until new technologies are developed, consolidated and adapted to the agricultural and industrial sector. These ternary blends can lower exhaust emissions without creating major problems for existing fuel-feeding systems, typically designed for low-viscosity fossil fuels. One of the concerns in using liquid biofuels, specifically biodiesel, is the high chemical affinity with conventional and bio-based lubricants, so the main parameters of lubricants can vary significantly after a long operation of the engine. The comprehensive literature review presented in this article delves into the technical challenges, the main research pathways, and the potential solutions associated with the utilization of biofuels. Additionally, it investigates the emerging application of nanoparticles as additives in lubricants and biofuels, highlighting their valuable potential. This study also discusses the potential implementation of bio-ethanol in ternary blends, offering a promising avenue for reducing reliance on fossil fuels while maintaining engine efficiency.

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A review of current understanding in tribochemical reactions involving lubricant additives

Cited by 34 publications

References 179 publications

Boron–Nitrogen Codoped Carbon Nanosheets as Oil-Based Lubricant Additives for Antioxidation, Antiwear, and Friction Reduction

Boron–Nitrogen Codoped Carbon Nanosheets as Oil-Based Lubricant Additives for Antioxidation, Antiwear, and Friction Reduction

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Technical Implications of the Use of Biofuels in Agricultural and Industrial Compression-Ignition Engines with a Special Focus on the Interactions with (Bio)lubricants

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