Tribological Properties of Tungsten Disulfide Nanoparticles Surface-Capped by Oleylamine and Maleic Anhydride Dodecyl Ester as Additive in Diisooctylsebacate

Jiang, Zhengquan; Zhang, Yujuan; Yang, Guangbin; Ma, Jialin; Zhang, Shengmao; Yu, Laigui; Zhang, Pingyu

doi:10.1021/acs.iecr.6b04074

Cited by 28 publications

(4 citation statements)

References 31 publications

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“…Oleylamine (OM) and maleic anhydride dodecyl ester (MADE) were adopted as surface modifiers to prepare OM/MADE-capped WS 2 nanoparticles. The OM/MADE-capped nanoparticles added in the same base stock exhibit good dispersibility and resulted in greatly improved tribological properties [28]. The OM/MADE-capped WS 2 particulates added in the base oil are well adsorbed on the sliding surfaces of the steel-steel contact in order to afford a chemisorption film with a low shear force.…”

Section: Introductionmentioning

confidence: 99%

Tungsten Disulfide Inorganic Nanotubes Functionalized by PTFE for Friction Application

et al. 2021

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Inorganic nanotubes (INTs) and fullerene-like nanoparticles (NPs) of WS2/MoS2 penetrate and exfoliate at the contact interface and facilitate tribofilm formation. While the tribological properties are greatly improved by exfoliated NPs that shed easily, they may be diminished by agglomeration in oil. Therefore, surface functionalization is employed to improve dispersion in oil-based suspensions. Here, WS2 INTs were functionalized by polytetrafluoroethylene (PTFE) in a simple and cost-effective bath sonication method. WS2-INTs with two concentrations of added PTFE were characterized by scanning and transmission electron microscopy, micro-Raman spectroscopy, and thermogravimetric analysis. Superior distribution of WS2 was observed before and during friction experiments. Chemical analysis showed a significantly greater amount of PTFE-coated INTs on rubbed surfaces, in accordance with the improved friction and wear properties.

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Section: Introductionmentioning

confidence: 99%

Tungsten Disulfide Inorganic Nanotubes Functionalized by PTFE for Friction Application

et al. 2021

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“…In this paper, OM-modified CeO 2 nanoparticles with diameter 10 nm were prepared by one-step pyrolysis method in which their stable dispersion in base oil poly-alpha olefin (PAO) is enabled [23][24][25]. The friction reduction, antiwear, and load-carrying capacity of CeO 2 nanoparticles were investigated in a wide concentration range.…”

Section: Introductionmentioning

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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“…The WS 2 nanoparticles were not observed on the worn surfaces. Jiang Z et al [16] modified the surfaces of WS 2 nanoparticles by using oleylamine (OM) and maleic anhydride dodecyl ester (MADE), and found the tribological properties of modified WS 2 nanoparticles using a four-ball and a reciprocating tribometers. It was found that the OM-capped WS 2 nanoparticles had no effect on the frictional and wear reductions.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Tribological Properties of Oil-Based Flake WS<sub>2</sub>-Oleic Acid Lubricant on Steel-Brass Sliding Contact

et al. 2020

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The current research focused on the tribological properties of flake-like WS 2 particles dispersed into PAO 4 base oil with oleic acid as surfactant. Various concentrations of 0.2 mass%, 1 mass% and 3 mass% were applied in the preparation of WS 2 -OA lubricant. The wear tests were carried out using a ball-on-plate reciprocating sliding test configuration. It was found that the highest COF of 0.578 was obtained using PAO 4 base oil with significant fluctuations. The COF could be reduced to approximately 0.34 and stabilized after adding the OA. When introducing the WS 2 articles, the COF was around 0.158 under 0.2 mass%, 0.143 under 1 mass% and 0.145 under 3 mass%, and became almost constant after 4 min. In addition, the highest wear rate in width of 61.5 µm/m and in depth of 2.2 µm/m was found using PAO 4 base oil. The wear rate can be reduced to 51.6 µm/m in width (16.1%) and 0.9 µm/m (59.1%) in depth under 3 mass% OA. While using the WS 2 particles, the wear rate in width could be further reduced to 45.2 µm/m using 1 mass% but with slightly higher wear rate in depth than that of OA. Based on the analysis in SEM and EDX, the abrasive grooves became less after introducing the OA, some dark spots composed of carbon acted as tribo-films on the worn area. While using WS 2 particles, it could be found that WS 2 flakes were adhered on the surfaces to reduce the friction and wear.

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Tribological Properties of Tungsten Disulfide Nanoparticles Surface-Capped by Oleylamine and Maleic Anhydride Dodecyl Ester as Additive in Diisooctylsebacate

Cited by 28 publications

References 31 publications

Tungsten Disulfide Inorganic Nanotubes Functionalized by PTFE for Friction Application

Tungsten Disulfide Inorganic Nanotubes Functionalized by PTFE for Friction Application

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

Assessment of Tribological Properties of Oil-Based Flake WS<sub>2</sub>-Oleic Acid Lubricant on Steel-Brass Sliding Contact

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