Achieving macroscale superlubricity with ultra-short running-in period by using polyethylene glycol-tannic acid complex green lubricant

Friction

Research Article

Ruilin Shen¹  Zishuai Wu¹  Xiaojuan Li²  Min Feng²  Changhe Du²  Yange Feng³  Daoai Wang³  Tongtong Yu³  Liqiang Zhang³ 

[1] State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, China;State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 100049, Beijing, China;State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, China;Qingdao Center of Resource Chemistry and New Materials, 266100, Qingdao, China;

关键词: superlubricity;    running-in period;    tannic acid;    green lubricant;    friction;   

DOI  :  10.1007/s40544-022-0660-3

 received in 2022-02-08, accepted in 2022-06-02,  发布年份 2022

来源: Springer

【 摘 要 】

Superlubricating materials can greatly reduce the energy consumed and economic losses by unnecessary friction. However, a long pre-running-in period is indispensable for achieving superlubricity; this leads to severe wear on the surface of friction pairs and has become one of the important factors in the wear of superlubricating materials. In this study, a polyethylene glycol-tannic acid complex green liquid lubricant (PEG10000-TA) was designed to achieve macroscale superlubricity with an ultrashort running-in period of 9 s under a contact pressure of up to 410 MPa, and the wear rate was only 1.19 × 10−8 mm3·N−1·m−1. This is the shortest running-in time required to achieve superlubricity in Si3N4/glass (SiO2). The results show that the strong hydrogen bonds between PEG and TA molecules can significantly reduce the time required for the tribochemical reaction, allowing the lubricating material to reach the state of superlubrication rapidly. Furthermore, the strong hydrogen bond can share a large load while fixing free water molecules in the contact zone to reduce shear interaction. These findings will help advance the use of liquid superlubricity technology in industrial and biomedical.

【 授权许可】

CC BY   
© The author(s) 2022

【 图 表 】

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Fig. 14