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Graphene as a nanofiller for enhancing the tribological properties and thermal conductivity of base grease

机译：石墨烯作为纳米填充物，用于提高碱性特性和碱性润滑脂的导热率

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During mechanical processes, violent friction and wear between the friction contact surfaces not only causes wear to mechanical components, reducing the instrument life, but also causes friction heat, reducing the working efficiency of machines during operation. The addition of graphene-reinforced grease to the mechanical friction surface can effectively reduce the friction coefficient and improve the thermal conductivity. In this work, the tribological properties and thermal conductivity of base grease with graphene were investigated systematically. The tribological results showed that the grease with 2 wt% graphene had the best tribological properties among all these greases. The wear scar diameter and average friction coefficient of graphene grease with 2 wt% graphene reached 0.43 mm and 0.10 (the values for base grease are 0.50 mm and 0.118), respectively. In addition, the average friction coefficient and wear scar diameter increased proportionally with the increasing load and frequency. The thermal conductivity of the grease with 4 wt% graphene reached 0.28 W (m K)(-1), an increase of 55.5% in comparison with the base grease. It is proposed that the addition of graphene into the base grease effectively enhanced the tribological properties and thermal conductivity.
机译：在机械过程中，摩擦接触表面之间的剧烈摩擦和磨损不仅导致机械部件的磨损，还原仪器寿命，而且导致摩擦热，降低了操作期间机器的工作效率。将石墨烯增强润滑脂添加到机械摩擦表面可以有效地降低摩擦系数并提高导热率。在这项工作中，系统地研究了石墨烯的摩擦性质和导热性。摩擦学结果表明，具有2wt％石墨烯的润滑脂在所有这些润滑脂中具有最佳的摩擦学特性。具有2wt％石墨烯的石墨烯润滑脂的耐磨瘢痕直径和平均摩擦系数达到0.43mm，0.10（碱润滑脂的值为0.50mm，0.118）。另外，平均摩擦系数和耐磨瘢痕直径随着负荷和频率的增加而比例增加。具有4wt％石墨烯的润滑脂的导热率达到0.28W（k）（ - 1），与碱润滑脂相比，增加55.5％。提出将石墨烯的加入碱性润滑脂有效增强了摩擦学特性和导热率。

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    《RSC Advances》 |2019年第72期|共8页
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  • 正文语种 eng
  • 中图分类 化学;
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