MoS2/WS2 Quantum Dots as High‐Performance Lubricant Additive in Polyalkylene Glycol for Steel/Steel Contact at Elevated Temperature,Advanced Materials Interfaces

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MoS2/WS2 Quantum Dots as High‐Performance Lubricant Additive in Polyalkylene Glycol for Steel/Steel Contact at Elevated Temperature
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2017-11-23 , DOI: 10.1002/admi.201700859
Xinhu Wu _{1,

2} , Kuiliang Gong _{1,

3} , Gaiqing Zhao _{1,

3} , Wenjing Lou _{1,

3} , Xiaobo Wang _{1,

3} , Weimin Liu ₁

Affiliation

Herein, molybdenum disulfide (MoS₂) and tungsten disulfide (WS₂) quantum dots (QDs) are prepared by a facile and green technique, and characterized by microscopy and spectroscopy. The resulting products display exceptional stability in polyalkylene glycol (PAG) base oil, and are used for the first time as friction reducing and antiwear additives in PAG for steel/steel contact. Tribological measurements indicate that the stable dispersion consisting of PAG mixed with MoS₂/WS₂ QDs exhibits significant tribological properties compared with pure PAG and PAG containing MoS₂/WS₂ QDs nanosheets under different loads at elevated temperatures. The excellent tribological behaviors of MoS₂/WS₂ QDs are attributed to the formation of a boundary lubrication film, which can be generated not only by the physical entrapment of MoS₂/WS₂ QDs at the ball‐disk contact surfaces, but also by tribochemical reaction between MoS₂/WS₂ and the iron atoms/iron oxide species.

中文翻译：

MoS2 / WS2量子点作为聚亚烷基二醇中的高性能润滑油添加剂，用于高温下的钢/钢接触

在此，通过简便且绿色的技术制备二硫化钼（MoS ₂）和二硫化钨（WS ₂）量子点（QD），并通过显微镜和光谱学对其进行表征。所得产品在聚亚烷基二醇（PAG）基础油中显示出出色的稳定性，并首次在PAG中用作钢/钢接触的减摩和抗磨添加剂。摩擦学测量表明，由PAG与MoS ₂ / WS ₂ QDs混合而成的稳定分散体与纯PAG和含有MoS ₂ / WS ₂ QDs纳米片的PAG在高温下不同负荷下相比，表现出显着的摩擦学性能。MoS的优异摩擦学行为₂ / WS ₂ QDs归因于边界润滑膜的形成，不仅可以通过将MoS ₂ / WS ₂ QDs物理截留在球盘接触表面上，而且还可以通过MoS ₂ /之间的摩擦化学反应生成WS ₂和铁原子/氧化铁物质。

更新日期：2017-11-23

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