Tribological Properties of Oleylamine-Modified Ultrathin WS2 Nanosheets as the Additive in Polyalpha Olefin Over a Wide Temperature Range

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Tribological Properties of Oleylamine-Modified Ultrathin WS2 Nanosheets as the Additive in Polyalpha Olefin Over a Wide Temperature Range

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作者：Zhengquan Jiang ; Yujuan Zhang ; Guangbin Yang ; Kunpeng Yang…
关键词：WS2 nanosheet ; Polyalpha olefin ; Lubricant additive ; Tribological properties
刊名：Tribology Letters
出版年：2016
出版时间：March 2016
年：2016
卷：61
期：3
全文大小：2,791 KB
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作者单位：Zhengquan Jiang (1)
Yujuan Zhang (1)
Guangbin Yang (1)
Kunpeng Yang (1)
Shengmao Zhang (1)
Laigui Yu (1)
Pingyu Zhang (1)

1. Engineering Research Center for Nanomterials, Henan University, Kaifeng, 475004, People’s Republic of China
刊物类别：Chemistry and Materials Science
刊物主题：Chemistry
Tribology, Corrosion and Coatings
Surfaces and Interfaces and Thin Films
Theoretical and Applied Mechanics
Physical Chemistry
Nanotechnology
出版者：Springer Netherlands
ISSN：1573-2711

文摘

Ultrathin WS₂ nanosheets modified by oleylamine (OM) were prepared via a solution-phase method at a relatively high temperature of 300 °C. The thermal stability of the as-prepared WS₂ nanosheets was evaluated by thermogravimetric analysis. The tribological properties of as-synthesized WS₂ nanosheets as the additive in polyalpha olefin (PAO6) were evaluated with a four-ball machine and a reciprocating tribometer over a wide temperature range from room temperature to 200 °C. The morphology and elemental composition of worn steel surfaces were analyzed with a scanning electron microscope, a three-dimensional optical profiler, an energy dispersive spectrometer and an X-ray photoelectron spectroscope. Results show that OM as the modifier is able to improve the dispersibility of WS₂ nanosheets in PAO6 base oil. At a mass fraction of 2.0 % in PAO6 base oil, as-synthesized WS₂ nanosheets exhibit excellent antiwear and friction-reducing performance over the selected temperature range. This is because as-synthesized WS₂ nanosheets as the additive in PAO6 are able to form adsorbed film with a low shear force and tribochemical reaction film composed of W, Fe and O elements on the worn steel surface. Keywords WS₂ nanosheet Polyalpha olefin Lubricant additive Tribological properties