Facile method preparation of oil-soluble tungsten disulfide nanosheets and their tribological properties over a wide temperature range

Jiang, Zhengquan; Yang, Guangbin; Zhang, Yujuan; Gao, Chuanping; Ma, Jialin; Zhang, Shengmao; Zhang, Pingyu

doi:10.1016/j.triboint.2019.03.011

Cited by 14 publications

(7 citation statements)

References 45 publications

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“…However, in keeping with the implementation of increasingly strict laws and regulations for environmental protection, the release of gaseous sulfide in the preparation of metal sulfide is highly limited, and the establishment of the low-temperature green synthesis method for fabricating metal sulfide is still a challenge. Jiang et al [80] synthesized oil-soluble WS 2 nanoadditive using green liquid-phase pyrolysis in the presence of (NH 4 ) 2 WS 2 O 2 as the precursor and oleic acid as the modifier. As shown in Figure 5, the as-synthesized oil-soluble WS 2 nanoadditive can significantly improve the tribological properties of the base oil over a wide temperature range, and it could be a potential alternative to ZDDP, thanks to its excellent friction reduction and antiwear properties superior to those of ZDDP.…”

Section: Sulfidementioning

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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Section: Sulfidementioning

confidence: 99%

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

et al. 2022

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“…However, the deformation vibration peak and bending vibration peak of the N-H bond appear at 1575 cm −1 and 800 cm −1 , respectively; the peak of OM-modified CeO 2 nanoparticles at 1575 cm −1 shifted to the right, and the peak at 800 cm −1 also disappeared, as shown by the solid line in the figure. This may be caused by the physical adsorption of oleamines on CeO 2 surface through coordination [28]. Therefore, we can infer that OM were successfully modified on the surface of CeO 2 nanoparticles, thereby preventing them from aggregation and improving their compatibility with lubricating base stocks.…”

Section: Evaluation Of Tribological Propertiesmentioning

confidence: 99%

“…The first 2% of the mass loss is likely due to the micro amount of washing reagent adsorbed on the surface of CeO 2 particles, there is a slow weight loss in 25-100 °C. Then, the rapid weight loss at 360 °C (about 10%) is attributed to the decomposition of oleamine molecules adsorbed on the surface of CeO 2 nanoparticles [28], the weight loss around 500 °C finally. Based on this, we believed that the 10% weight loss is due to physical adsorption.…”

Section: Evaluation Of Tribological Propertiesmentioning

confidence: 99%

The Tribological Mechanism of Cerium Oxide Nanoparticles as Lubricant Additive of Poly-Alpha Olefin

Lei

Zhang

et al. 2020

Tribol Lett

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Oleylamine (hereinafter referred to as OM)-modified CeO 2 nanoparticles were synthesized by a one-pot pyrolysis method. The tribological properties of the as-prepared CeO 2 nanoparticles as the lubricant additive in poly-alpha olefin (PAO) were investigated with a four-ball machine, and their lubricating mechanism was discussed in relation to worn surface analyses by SEM, EDS, and XPS. Findings indicate that these nanoparticles exhibit good dispersibility as well as excellent anti-wear ability in PAO. This is because OM-modified CeO 2 nanoparticles can catalyze the oxidation of metallic Fe to form ferrite oxide-containing tribo-film. Under the condition of ASTM D2266-2001, the same lowest WDS was obtained at the concentration of 0.2 wt% and 1.8 wt%. When the concentration of CeO 2 is 0.2 wt%, a compact catalytic oxidation tribo-film is formed, which has more outstanding long-term anti-wear ability. When 1.8 wt% CeO 2 is added, the tribo-film formed is the combination of catalytic oxidation film and ceria deposition film, which has more significant bearing capacity.

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“…It can be found from the distribution diagram of each element in Figure 11 that elements Fe and O are very densely distributed, the element W is evenly distributed, and the element S is the least distributed. According to literature [31][32][33][34][35], it was found that oxidation products were formed on the friction surface through the X-ray photoelectron spectroscopy (XPS) analysis of the friction surface after the test. After further study on the products formed, it was found that the Fe 2p peak corresponds to Fe 2 O 3 or FeO, and the worn surface appeared on FeO and Fe 2 O 3 film.…”

Section: Lubrication Mechanismmentioning

confidence: 99%

“…The XPS data indicate that a frictional chemical reaction occurs on the surface of the wear steel during the friction process, thus forming the boundary lubrication film composed of WO 3 , Fe 2 O 3 , and FeO. Therefore, it can be speculated that the friction surface is most likely to form a dense chemical reaction film containing Fe 2 O 3 and FeO through chemical reactions [31][32][33][34][35]. In addition, the element W is evenly distributed on the friction surface, while the element S is scarce on the friction surface, indicating that W is most likely to form tungsten oxide on the surface.…”

Section: Lubrication Mechanismmentioning

confidence: 99%

Study on Tribological Properties and Mechanisms of Different Morphology WS2 as Lubricant Additives

Zhang

Wang

et al. 2020

Materials

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In the present work, the relationship curve of the coefficient of friction (COF) with varying loads of different morphology WS2 lubricating additives in the friction process at various sliding speeds was studied. On this basis, wear marks and elements on the wear surfaces after friction were analyzed, and then the anti-wear and mechanism effects of WS2 of different forms in the lubrication process were discussed. Meanwhile, the Stribeck curve was used to study the lubrication state of the lubricating oil in the friction process. It was revealed that the COF of lubricating oil containing lamellar WS2 decreased by 29.35% at optimum condition and the minimum COF was concentrated at around 100 N. The COF of lubricating oil containing spherical WS2 decreased by 30.24% and the minimum coefficient was concentrated at 120 N. The extreme pressure property of spherical WS2 was better than that of lamellar WS2, and the wear resistance of spherical WS2 was more stable when the load was over 80 N. The different morphology of WS2 additives can play anti-wear and anti-friction roles within a wide range of sliding speeds.

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Facile method preparation of oil-soluble tungsten disulfide nanosheets and their tribological properties over a wide temperature range

Cited by 14 publications

References 45 publications

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

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

The Tribological Mechanism of Cerium Oxide Nanoparticles as Lubricant Additive of Poly-Alpha Olefin

Study on Tribological Properties and Mechanisms of Different Morphology WS2 as Lubricant Additives

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