Enhanced lubricating properties of oils containing graphene synthesized in atmospheric plasmas
Enhanced lubricating properties of oils containing graphene synthesized in atmospheric plasmas
复制标题
大气等离子体中合成的含有石墨烯的油的润滑性能增强
DOI：
10.1016/j.cartre.2020.100010
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发表时间：
2020
影响因子：
29.4
通讯作者：
M. Siniawski
中科院分区：
文献类型：
--
作者：
G. Krauss;A. Dato;M. Siniawski
本文报道了使用气相合成石墨烯（GSG）作为润滑剂添加剂，其能够显着增强广泛使用的油的摩擦学性能。 GSG 纯净、高度有序，并表现出固有的褶皱形态，使纳米材料能够在基础油和全配方润滑剂中自分散并抵抗聚集。微摩擦磨损试验表明，当向菜籽油、聚 α 烯烃 (PAO)、全配方石油和全配方全合成油中添加相对少量的 GSG (≤ 0.1 wt%) 时，滑动表面的磨损可显着减少高达 53%。此外，随着 PAO 中纳米材料浓度的降低，GSG 引起的表面磨损减少保持一致，这表明基础油中 GSG 浓度低于 0.025 wt% 可以实现类似的磨损减少。据报道，PAO 中存在可控的 GSG 偏析现象，这有可能实现滑动表面的受控磨损和 GSG 添加剂的回收利用。 GSG 通过环保的大气等离子体工艺一步生产。我们的结果表明，GSG 有望成为发动机和其他摩擦学应用中使用的润滑油的可持续且有效的抗磨添加剂。
The use of gas-phase-synthesized graphene (GSG) as a lubricant additive that is capable of significantly enhancing the tribological properties of widely used oils is reported herein. GSG is pure, highly ordered, and exhibits an inherently crumpled morphology that causes the nanomaterial to self-disperse and resist aggregation in base oils and fully formulated lubricants. Micro-tribometer tests revealed that the wear of sliding surfaces was significantly reduced by up to 53% when relatively minute amounts of GSG (≤ 0.1 wt%) was added to canola oil, polyalphaolefin (PAO), fully-formulated petroleum oil, and fully-formulated full synthetic oil. Additionally, the wear reduction of surfaces caused by GSG remained consistent as the concentration of the nanomaterial was reduced in PAO, which indicates that GSG concentrations below 0.025 wt% in base oil could achieve similar reductions in wear. A controllable GSG segregation phenomenon in PAO is reported, which has the potential to enable the controlled wear of sliding surfaces and the recycling of GSG additives. GSG is produced in a single step through an environmentally friendly atmospheric plasma process. Our results demonstrate that GSG holds promise as a sustainable and effective anti-wear additive for lubricants used in engines and other tribological applications.