Preparation of graphene-loading copper nanoparticles by freeze drying and its tribological properties

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL Lubrication Science Pub Date : 2022-12-27 DOI:10.1002/ls.1638

Runling Peng, Wei Wang, Peng Wang, Jinyue Liu, Shijiao Liu, Haonan Zhai, Junde Guo

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Abstract

To reduce the agglomeration of graphene and improve the synergistic friction-reducing and anti-wear action of graphene loading copper, one-step preparation of reduced graphene oxide/copper(RGO/Cu) nanoparticles by freeze-drying method was used, the influence of process parameters on particles size of RGO/Cu is studied by orthogonal experiments. The microstructures of RGO/Cu nanoparticles are characterized by SEM and AFM, and the tribological properties of RGO/Cu nanoparticles are studied on a tribometer. The results show that the purity of RGO/Cu nanoparticles prepared by freeze-drying was higher, and the copper nanoparticles 100–200 nm are uniformly attached to the graphene surface. It was found that RGO/Cu nanoparticles have better friction reduction and anti-wear properties than graphene mono-agent as lubricant additive. The synergistic anti-friction and anti-wear performance are better at the addition of 0.10 wt% for RGO/Cu nanoparticles. Compared with the base oil, the friction coefficient decreases by 23.1%, and the width of wear scar decreases by 62.5%.

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石墨烯负载铜纳米颗粒的冷冻干燥制备及其摩擦学性能

为了减少石墨烯的团聚，提高石墨烯负载铜的协同减摩擦和抗磨作用，采用冷冻干燥法一步制备了还原性氧化石墨烯/铜纳米颗粒(RGO/Cu)，并通过正交实验研究了工艺参数对RGO/Cu颗粒尺寸的影响。采用扫描电镜(SEM)和原子力显微镜(AFM)对RGO/Cu纳米颗粒的微观结构进行了表征，并在摩擦计上研究了RGO/Cu纳米颗粒的摩擦学性能。结果表明，冷冻干燥法制备的氧化石墨烯/铜纳米颗粒纯度较高，且100-200 nm的铜纳米颗粒均匀附着在石墨烯表面。结果表明，RGO/Cu纳米颗粒作为润滑油添加剂比石墨烯具有更好的减摩和抗磨性能。当RGO/Cu纳米颗粒添加量为0.10 wt%时，其协同抗摩擦和抗磨损性能更好。与基础油相比，摩擦系数减小23.1%，磨痕宽度减小62.5%。

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.