Tribological properties of polyimide coating filled with solvent-free covalent carbon quantum dots nanofluids

被引：0
|
作者：
Zhang, Baokai [1 ,2 ]
Pei, Xianqiang [2 ]
Wang, Yanming [2 ]
Wan, Shanhong [1 ]
Zhao, Gai [3 ]
Wang, Qihua [1 ]
Wang, Tingmei [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 73000, Peoples R China
[2] Hebei Univ Engn, Coll Mat Sci & Engn, Handan 056038, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Aerosp Struct, Nanjing 210016, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2025年 / 202卷
关键词：
Polyimide; Carbon quantum dots; Tribological properties; MD simulation;
D O I：
10.1016/j.triboint.2024.110376
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Novel organic coatings were developed by incorporating solvent-free covalent carbon quantum dots nanofluids (CQDs NFs) into a polyimide (PI) matrix. The tribological properties of CQDs NFs/PI composite coatings were tested using a ball-on-disk tribometer, revealing that even a low loading of CQDs NFs significantly improved tribological performance of PI. Molecular dynamics (MD) simulations and nanoindentation tests showed that CQDs NFs restricted PI molecular chain movement, enhancing mechanical properties. Additionally, CQDs NFs promoted the formation of stable transfer films on steel surfaces, improving wear resistance. This study confirms CQDs NFs' effectiveness in modifying PI composite coatings' friction and wear properties.
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页数：11
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