Preparation and Tribological Behavior of N-doped Graphene Oxide Quantum Dots with MoS2 and Al2O3 Nanocomposites as Lubricant Additive in Aqueous Glycerol

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-07-03 DOI:10.1007/s11249-024-01885-x

Sang Xiong, Jiaqi He, Chenglong Wang

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Abstract

N-doped graphene oxide quantum dots (NGOQDs) with MoS₂ and Al₂O₃ nanocomposites were prepared by solvothermal method. The morphology and the composition and structure of the prepared composites were characterized by TEM, XRD, Raman, ATR-FTIR, and XPS. Tribological behavior of NGOQDs-MoS₂ and NGOQDs-Al₂O₃ nanocomposites as lubricant additive in aqueous glycerol were studied. Through experiments and MD simulations, the tribochemistry-induced lubrication mechanism was disclosed. The results shows that the combination of NGOQDs and hydrated glycerol can significantly improve lubrication performance, and the addition of NGOQDs-MoS₂ and NGOQDs-Al₂O₃ nanoparticles can further improve tribological properties. The formation of a tribofilm through tribochemical induced lubrication mechanism improves the wear resistance of metal surfaces.

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掺杂 N 的氧化石墨烯量子点与 MoS2 和 Al2O3 纳米复合材料在甘油水溶液中作为润滑添加剂的制备与摩擦学行为

采用溶热法制备了 N 掺杂氧化石墨烯量子点（NGOQDs）与 MoS2 和 Al2O3 纳米复合材料。利用 TEM、XRD、拉曼、ATR-FTIR 和 XPS 对所制备的复合材料的形貌、组成和结构进行了表征。研究了 NGOQDs-MoS2 和 NGOQDs-Al2O3 纳米复合材料作为润滑添加剂在甘油水溶液中的摩擦学行为。通过实验和 MD 模拟，揭示了摩擦化学诱导的润滑机理。结果表明，NGOQDs 与水合甘油的结合能显著改善润滑性能，而添加 NGOQDs-MoS2 和 NGOQDs-Al2O3 纳米粒子能进一步改善摩擦学性能。通过摩擦化学诱导润滑机制形成的三膜提高了金属表面的耐磨性。

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.