首页|Towards direct superlubricity and superlow wear via amino modification of polyhydroxy alcohol solutions

Towards direct superlubricity and superlow wear via amino modification of polyhydroxy alcohol solutions

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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.

direct superlubricityamino modificationmolecular layersuperlow wear

Qiang MA、Chengpeng YAN、Rui YAN、Xin XU、Haifeng WANG

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State Key Laboratory of Solidification Processing,Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University,Xi'an 710072,China

Chongqing Innovation Center,Northwestern Polytechnical University,Chongqing 401135,China

Research&Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518063,China

National Key R&D Program of ChinaNatural Science Foundation of Chongqing,ChinaGuangdong Basic and Applied Basic Research FoundationFundamental Research Funds for the Central Universities of China

2022YFB38090002023NSCQ-MSX30292022A1515111005G2022KY05108

2024

10.1007/s40544-023-0848-1

摩擦(英文)

摩擦(英文)

CSTPCDEI
ISSN：2223-7690
年,卷(期)：2024.12(9)
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