Purpose

This study aims to investigate the synergistic friction reduction and antiwear effects of lyophilized graphene loading nano-copper (RGO/Cu) as lubricating oil additives, compared with graphene.

Design/methodology/approach

The friction performance of freeze-drying graphene (RGO) and RGO/Cu particles was investigated at different addition concentrations and under different conditions.

Findings

Graphene plays a synergistic friction reduction and antiwear effect because of its large specific surface area, surface folds and loading capacity on the nanoparticles. The results showed that the average friction coefficients of RGO and RGO/Cu particles were 22.9% and 6.1% lower than that of base oil and RGO oil, respectively. In addition, the widths of wear scars were 62.3% and 55.3% lower than those of RGO/Cu particles, respectively.

Originality/value

The RGO single agent is suitable for medium-load and high-speed conditions, while the RGO/Cu particles can perform better in the conditions of heavy load and high speed.

中文翻译：

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冻干石墨烯负载纳米铜作为润滑油添加剂的摩擦学性能

目的

本研究旨在研究与石墨烯相比，冻干石墨烯负载纳米铜（RGO/Cu）作为润滑油添加剂的协同减摩和抗磨效果。

设计/方法/途径

研究了冷冻干燥石墨烯 (RGO) 和 RGO/Cu 颗粒在不同添加浓度和不同条件下的摩擦性能。

发现

石墨烯因其较大的比表面积、表面褶皱和对纳米粒子的负载能力而发挥协同减摩和抗磨作用。结果表明，RGO和RGO/Cu颗粒的平均摩擦系数分别比基础油和RGO油低22.9%和6.1%。此外，磨痕宽度分别比 RGO/Cu 颗粒低 62.3% 和 55.3%。

原创性/价值

RGO单剂适用于中载高速工况，而RGO/Cu颗粒在重载高速工况下表现更佳。