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The synthesis of two-dimensional MoS2 nanosheets with enhanced tribological properties as oil additives

机译：作为油添加剂的具有增强摩擦学性能的二维MoS2纳米片的合成

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The use of MoS _(2) nanosheets as oil additives has been proved effective to reduce friction and wear. Furthermore, it has been suggested that the synthesis of MoS _(2) nanosheets with an ultrathin structure could benefit the friction and wear reduction, as they would penetrate into the contact area easily. In this paper, two-dimensional MoS _(2) nanosheets were successfully fabricated by a solvothermal method with the aid of oleylamine. Meanwhile, the synthesized MoS _(2) nanosheets exhibited perfect dispersing stability in paraffin oil, due to the surface modification by oleylamine molecules. The friction and wear properties of the synthesized MoS _(2) nanosheets as oil additives were investigated using a ball-on-disk tribotester. The results showed that the two-dimensional MoS _(2) nanosheets exhibited enhanced friction-reducing and antiwear behaviors as compared to the multilayered MoS _(2) nanosheets. The prominent tribological performance of the two-dimensional MoS _(2) nanosheets was attributed to the formation of a thick tribofilm inside the wear tracks, which was confirmed by XPS analyses of the rubbing interfaces.
机译：已证明使用MoS _（2）纳米片作为油添加剂可以有效减少摩擦和磨损。此外，已经提出具有超薄结构的MoS_（2）纳米片的合成可以有益于减少摩擦和磨损，因为它们将容易地渗透到接触区域中。本文通过溶剂热法借助油胺成功制备了二维MoS _（2）纳米片。同时，由于油胺分子的表面改性，合成的MoS_（2）纳米片在石蜡油中表现出完美的分散稳定性。合成的MoS _（2）纳米片作为油添加剂的摩擦和磨损性能是使用圆盘球三botester研究的。结果表明，与多层MoS _（2）纳米片相比，二维MoS _（2）纳米片表现出增强的减摩和抗磨性能。二维MoS _（2）纳米片的突出摩擦学性能归因于在磨损轨迹内部形成了厚厚的摩擦膜，这一点已通过XPS对摩擦界面的分析得以证实。

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