中国物理B ›› 2022, Vol. 31 ›› Issue (6): 66202-066202.doi: 10.1088/1674-1056/ac4a5f

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Evolution of surfaces and mechanisms of contact electrification between metals and polymers

Lin-Feng Wang(王林锋), Yi Dong(董义), Min-Hao Hu(胡旻昊), Jing Tao(陶静), Jin Li(李进), and Zhen-Dong Dai(戴振东)   

  1. Jiangsu Provincial Key Laboratory of Bionic Functional Materials, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2021-08-30 修回日期:2021-09-24 接受日期:2022-01-12 出版日期:2022-05-17 发布日期:2022-06-06
  • 通讯作者: Lin-Feng Wang E-mail:wanglf@nuaa.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52075249, 51505217, 51435008, and 51705247).

Evolution of surfaces and mechanisms of contact electrification between metals and polymers

Lin-Feng Wang(王林锋), Yi Dong(董义), Min-Hao Hu(胡旻昊), Jing Tao(陶静), Jin Li(李进), and Zhen-Dong Dai(戴振东)   

  1. Jiangsu Provincial Key Laboratory of Bionic Functional Materials, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2021-08-30 Revised:2021-09-24 Accepted:2022-01-12 Online:2022-05-17 Published:2022-06-06
  • Contact: Lin-Feng Wang E-mail:wanglf@nuaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52075249, 51505217, 51435008, and 51705247).

摘要: Contact electrification (CE) is a pretty common phenomenon, but still is poorly understood. The long-standing controversy over the mechanisms of CE related to polymers is particularly intense due to their complexity. In this paper, the CE between metals and polymers is systematically studied, which shows the evolution of surfaces is accompanied by variations of CE outputs. The variations of CE charge quantity are closely related to the creep and deformation of the polymer and metal surfaces. Then the relationship between CE and polymer structures is put forward, which is essentially determined by the electronegativity of elements and the functional groups in the polymers. The effects of load and contact frequency on the CE process and outputs are also investigated, indicating the increase of CE charge quantity with load and frequency. Material transfer from polymer to metal is observed during CE while electrons transfer from metal to polymer, both of which are believed to have an influence on each other. The findings advance our understanding of the mechanism of CE between metal and polymers, and provides insights into the performance of CE-based application in various conditions, which sheds light on the design and optimization of CE-based energy harvest and self-powered sensing devices.

关键词: contact electrification, surface evolution, material structures, material transfer

Abstract: Contact electrification (CE) is a pretty common phenomenon, but still is poorly understood. The long-standing controversy over the mechanisms of CE related to polymers is particularly intense due to their complexity. In this paper, the CE between metals and polymers is systematically studied, which shows the evolution of surfaces is accompanied by variations of CE outputs. The variations of CE charge quantity are closely related to the creep and deformation of the polymer and metal surfaces. Then the relationship between CE and polymer structures is put forward, which is essentially determined by the electronegativity of elements and the functional groups in the polymers. The effects of load and contact frequency on the CE process and outputs are also investigated, indicating the increase of CE charge quantity with load and frequency. Material transfer from polymer to metal is observed during CE while electrons transfer from metal to polymer, both of which are believed to have an influence on each other. The findings advance our understanding of the mechanism of CE between metal and polymers, and provides insights into the performance of CE-based application in various conditions, which sheds light on the design and optimization of CE-based energy harvest and self-powered sensing devices.

Key words: contact electrification, surface evolution, material structures, material transfer

中图分类号:  (Friction, tribology, and hardness)

  • 62.20.Qp
81.40.Pq (Friction, lubrication, and wear) 81.40.Lm (Deformation, plasticity, and creep) 68.55.am (Polymers and organics)