Core-rim structured MXene@SiO2 composites as oil-based additives for enhanced tribological properties

IF 6.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Friction Pub Date : 2024-05-01 DOI:10.1007/s40544-023-0840-9

Yuhong Cui, Shenghua Xue, Tiantian Wang, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu

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Abstract

Herein, we have prepared SiO₂ particles uploaded MXene nanosheets via in-situ hydrolysis of tetraetholothosilicate. Due to the large number of groups at the edges of MXene, SiO₂ grows at the edges first, forming MXene@SiO₂ composites with a unique core-rim structure. The tribological properties of MXene@SiO₂ as lubricating additive in 500 SN are evaluated by SRV-5. The results show that MXene@SiO₂ can reduce the friction coefficient of 500 SN from 0.572 to 0.108, the wear volume is reduced by 73.7%, and the load capacity is increased to 800 N. The superior lubricity of MXene@SiO₂ is attributed to the synergistic effect of MXene and SiO₂. The rolling friction caused by SiO₂ not only improves the bearing capacity but also increases the interlayer distance of MXene, avoiding accumulation and making it more prone to interlayer slip. MXene@SiO₂ is adsorbed on the friction interface to form a physical adsorption film and isolate the friction pair. In addition, the high temperature and high load induce the tribochemical reaction and form a chemical protection film during in the friction process. Ultimately, the presence of these protective films results in MXene@SiO₂ having good lubricating properties.

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作为油基添加剂的芯环结构 MXene@SiO2 复合材料可增强摩擦学性能

在这里，我们通过原位水解四乙醇基硅酸盐制备了上载 MXene 纳米片的 SiO2 颗粒。由于 MXene 边缘有大量基团，SiO2 首先在边缘生长，从而形成了具有独特核心-边缘结构的 MXene@SiO2 复合材料。用 SRV-5 评估了 MXene@SiO2 作为润滑添加剂在 500 SN 中的摩擦学性能。结果表明，MXene@SiO2 可将 500 SN 的摩擦系数从 0.572 降至 0.108，磨损量减少了 73.7%，承载能力提高到 800 N。SiO2 造成的滚动摩擦不仅提高了轴承的承载能力，还增加了 MXene 的层间距离，避免了堆积，使其更容易发生层间滑移。MXene@SiO2 吸附在摩擦界面上形成物理吸附膜，隔离了摩擦副。此外，高温和高负荷会诱发摩擦化学反应，在摩擦过程中形成化学保护膜。这些保护膜的存在最终使 MXene@SiO2 具有良好的润滑性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.