Preparation and Tribological Properties of Carbon Quantum Dots/Graphene Composites

张丽秀; 李帅; 芮海博; 王俊海; 李颂华; 尹振宇; 李新然

doi:10.13433/j.cnki.1003-8728.20240043

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Preparation and Tribological Properties of Carbon Quantum Dots/Graphene Composites

更新时间：2026-04-23

- Preparation and Tribological Properties of Carbon Quantum Dots/Graphene Composites
- Mechanical Science and Technology for Aerospace Engineering Vol. 45, Issue 2, Pages: 338-344(2026)
- 作者机构：
  
  1. 沈阳建筑大学机构分析与检测技术研究中心,沈阳,110168
  2. 沈阳建筑大学高档石材数控加工装备与技术国家地方联合工程试验室,沈阳,110168
  3. 沈阳建筑大学机械工程学院,沈阳,110168
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20240043
  CLC：
- Published：2026
- 稿件说明：
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张丽秀, 李帅, 芮海博, et al. Preparation and Tribological Properties of Carbon Quantum Dots/Graphene Composites[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(2): 338-344.
DOI：

张丽秀, 李帅, 芮海博, et al. Preparation and Tribological Properties of Carbon Quantum Dots/Graphene Composites[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(2): 338-344. DOI： 10.13433/j.cnki.1003-8728.20240043.

摘要

为提高石墨烯润滑油的分散性及润滑性能，研究石墨烯基碳量子点复合材料的制备并研究其摩擦磨损性能。以柠檬酸为前驱体，通过热解法制备出碳量子点(CQDs)，利用水热合成法将其与石墨烯复合，制备出CQDs/石墨烯复合材料，用静置沉淀法研究添加剂的分散稳定性，利用Rtec摩擦磨损试验机进行试验，探究CQDs和石墨烯协同作用的摩擦学性能，对复合材料和磨痕进行表征分析。结果表明：CQDs/石墨烯相比于CQDs、石墨烯表现出更好分散性；CQDs/石墨烯润滑油减摩抗磨效果最为显著，当CQDs/石墨烯质量比为4∶1时，润滑效果最好；在40 N工况下平均摩擦因数相较于石墨烯润滑油降低了49.8%。CQDs/石墨烯润滑油在摩擦过程中会生成一系列碳氧化合物和其他摩擦化学产物，这些产物会形成一层保护膜。可见CQDs的引入可以提高石墨烯润滑油摩擦学性能。

Abstract

In order to improve the lubrication performance of graphene lubricating oil

the friction and wear properties of graphene-based carbon quantum dot composites as lubricant additives were studied. Carbon quantum dots (CQDs) were fabricated by pyrolysis with citric acid as the precursor

and CQDs/graphene composites were fabricated by hydrothermal synthesis

the dispersion stability of additives was studied by static precipitation method

the friction and wear tests were carried out by Rtec friction and wear testing machine

the tribological properties of the synergy between CQDs and graphene were explored

and the composites and wear marks were characterized and analyzed. Comparing with CQDs and graphene

CQDs/graphene showed better dispersion. CQDs/graphene lubricating oil has the most significant anti-friction and anti-wear effect

and the lubrication effect is the best when the mass ratio of CQDs/graphene is 4∶1. At 40 N

the average coefficient of friction is reduced by 57.9% comparing with graphene lubricant. CQDs/graphene lubricants produce a range of carbon oxides and other tribochemical products in friction that form a protective film. It can be seen that the introduction of CQDs can improve the tribological properties of graphene lubricating oils.

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