通过对聚羟基乙醇溶液进行氨基改性,实现直接超润滑和超低磨损

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2024-07-11 DOI:10.1007/s40544-023-0848-1
Qiang Ma, Chengpeng Yan, Rui Yan, Xin Xu, Haifeng Wang
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引用次数: 0

摘要

摩擦仍然是能量消耗和部件磨损的主要方式,而实现超润滑则为节能和终生磨损保护带来了巨大希望。这项工作的结果表明,当聚合羟基乙醇溶液被氨基选择性修饰时,钢/Si3N4 接触件可在工程规模上实现直接超润滑和超低磨损。之所以能产生宏观的直接超润滑性,是因为摩擦界面上的 3-氨基-1,2-丙二醇分子可被诱导旋转并垂直吸附在摩擦表面上,从而在原位形成厚而致密的分子膜来钝化接触面。此外,氨基改性还有利于通过加强分子间氢键相互作用来改善润滑状态,使其从边界润滑状态转变为混合润滑状态,从而提高承载能力并减少固体表面的直接接触。因此,可同时实现 0.01 的直接超低平均摩擦和超低磨损。这项工作中的直接超润滑和超低磨损设计原理确实提供了一种有效的策略,可从根本上提高能效,并为运动机械组件提供终生磨损保护。
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Towards direct superlubricity and superlow wear via amino modification of polyhydroxy alcohol solutions

Friction remains as the primary mode of energy dissipation and components wear, and achieving superlubricity shows high promise in energy conservation and lifetime wear protection. The results in this work demonstrate that direct superlubricity combined with superlow wear can be realized for steel/Si3N4 contacts on engineering scale when polyhydroxy alcohol solution was selectively modified by amino group. Macroscopic direct superlubricity occurs because 3-amino-1,2-propanediol molecules at the friction interface could be induced to rotate and adsorb vertically on the friction surface, forming in-situ thick and dense molecular films to passivate the asperity contacts. Furthermore, amino modification is also conducive to improving the lubrication state from boundary to mixed lubrication regime by strengthening the intermolecular hydrogen bonding interaction, presenting enhanced load-bearing capability and reduced direct solid asperity contacts. Thus, direct superlow average friction of 0.01 combined with superlow wear are achieved simultaneously. The design principle of direct superlubricity and superlow wear in this work indeed offers an effective strategy to fundamentally improve energy efficiency and provide lifetime wear protection for moving mechanical assemblies.

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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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