作为润滑添加剂的 C@Ag 核壳结构可实现高效润滑

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2024-07-11 DOI:10.1007/s40544-023-0851-6
Dong Ao, Xiaoqiang Fan, Minhao Zhu
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引用次数: 0

摘要

通过引入具有硬核和软壳的核壳结构润滑添加剂,可以实现高效的协同润滑,从而从摩擦过程中的结构变化中获得预期的抗磨损性能。本研究采用氧化还原法制备了具有核壳结构的 C@Ag 微球。详细研究了不同浓度的 C@Ag 微球作为基础油(G1830)添加剂的摩擦学性能。与基础油相比,添加 0.5 wt% 的 C@Ag 颗粒可使摩擦系数(COF)和磨损体积(Wv)分别降低 15.5% 和 88%。更重要的是,C@Ag 颗粒的润滑性能优于单一添加剂(如碳球(CS)和纳米银颗粒)。C@Ag 核壳微粒通过柔性 Ag 和碳球(CS)的熔融结合形成三重膜,从而实现优异的自修复性能和高效润滑。因此,具有硬核和软壳的核壳结构纳米粒子在高性能润滑应用方面前景广阔。
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C@Ag core–shell structure as lubricating additives towards high efficient lubrication

Efficient cooperative lubrication can be achieved via the introduction of core–shell structure lubricant additives with hard core and soft shell, for obtaining the expected anti-wear performance from the structural changes in the friction process. In this study, C@Ag microspheres with a core–shell structure were prepared by the redox method with carbon spheres as the core and Ag nanoparticles as the shell. Their tribological behaviors as base oil (G1830) additive with different concentrations were investigated in detail. Compared with base oil, the addition of C@Ag particles at 0.5 wt% can reduce the coefficient of friction (COF) and wear volume (Wv) up to 15.5% and 88%, respectively. More importantly, C@Ag particles provide superior lubrication performance to single additive (like carbon sphere (CS) and Ag nanoparticle). C@Ag core–shell particles contribute to the formation of tribo-film by melt bonding of flexible Ag and carbon sphere (CS) toward excellent self-repair performance and high-efficiency lubrication. Hence, core–shell structural nanoparticles with hard-core and soft-shell hold bright future for high-performance lubrication application.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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