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Peer-reviewed publication

2021 · Volume 630 · Article 127552

Study on the self-cleaning phenomenon and anti-pollution flashover performance of micro-nanostructure superhydrophobic coating surface under a high humidity environment

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Authors and affiliations

  • Jinyu ChenSchool of Electrical and Electronic Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
  • Junwu Chen *School of Electrical and Electronic Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, ChinaDSAN NEW MATERIALS core team
  • Lee Li *School of Electrical and Electronic Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
  • Shengwu WangSchool of Electrical and Electronic Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
  • Yi XieState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology (WUT), Wuhan 430074, ChinaDSAN NEW MATERIALS core team

DSAN NEW MATERIALS core team participation

Research experience connected with DSAN NEW MATERIALS' technical leadership.

Co-authored by DSAN NEW MATERIALS leaders Junwu Chen and Yi Xie; the paper also records participation related to DSAN NEW MATERIALS in preparing the studied coating.

Junwu Chen

corresponding author · project administration · validation · methodology

Paper affiliation: Huazhong University of Science and Technology

Yi Xie

resources

Paper affiliation: Wuhan University of Technology

01

Publisher abstract

Original abstract

Using micro-nanostructure superhydrophobic coating with the unique self-cleaning phenomenon is a feasible method to further reduce the frequency of insulator pollution flashover. However, the research on the anti-pollution flashover performance of superhydrophobic coating is still insufficient. This paper analyzes the various types of forces on the polluted particles accumulated on the superhydrophobic coating surface, and calculates that the vertical force or the horizontal force on the nano-scale and micro-scale particles is positive when they are in contact with most types of droplets. After being fully wetted, these particles are easily absorbed or pulled by the droplets and leave the coating surface. So it is necessary to establish a new DC pollution flashover mechanism model of superhydrophobic coatings surface from the electric field perspective. Based on this model, the relationship between the pollution flashover voltage and the dry flashover voltage is clarified in the state of extremely small leakage current. Furthermore, the anti-pollution flashover performance experiment was carried out on superhydrophobic coating, RTV coating, and uncoated surface to test the leakage current under different conditions. The experimental results show that at any pollution degree, the leakage current of superhydrophobic coating surface always remains about 16.3μA after being completely wetted.

02

DSAN NEW MATERIALS editorial interpretation

Why this research matters to material applications.

This paper explains the self-cleaning mechanism and leakage-current behavior behind hydrophobic insulation protection. Its participation by Junwu Chen and Yi Xie, together with the recorded coating-preparation collaboration, makes it relevant technical background for DSAN NEW MATERIALS anti-pollution-flashover evaluation. The paper is research evidence rather than a universal product-performance claim.

This explanation was prepared by DSAN NEW MATERIALS for engineering orientation. The original paper remains the authoritative source.

03

Research highlights

Key findings reported in the paper.

  1. 01

    The study models the vertical and horizontal forces acting on contaminated particles when droplets contact a micro-nanostructured superhydrophobic surface.

  2. 02

    It establishes a DC pollution flashover mechanism model from an electric-field perspective.

  3. 03

    Leakage-current tests compare superhydrophobic, RTV-coated and uncoated surfaces under different pollution and wetting conditions.

  4. 04

    After full wetting, the superhydrophobic coating maintained a leakage current of about 16.3 microamperes across the tested pollution levels.

04

Paper navigation

Contents of the publication.

  1. 1 Introduction
  2. 2 Preparation and performance of micro-nanostructure superhydrophobic coating
  3. 3 Self-cleaning phenomenon and theoretical analysis
  4. 3.1 Process analysis of self-cleaning phenomenon
  5. 3.2 Force analysis between droplet and polluted particle
  6. 4 Calculation and analysis of factors affecting the self-cleaning phenomenon
  7. 4.1 Polluted particle type and radius
  8. 4.2 Droplet type
  9. 4.3 Droplet static contact angle
  10. 5 DC pollution flashover mechanism model of superhydrophobic coating surface
  11. 6 Instrument and method of anti-pollution flashover performance experiment
  12. 6.1 Experimental instruments and samples
  13. 6.2 Pollution method
  14. 6.3 Experimental method
  15. 7 Experimental results and analysis of anti-pollution flashover performance
  16. 7.1 Pollution degree
  17. 7.2 DC voltage
  18. 7.3 Wetting time
  19. 8 Conclusion

05

Cite this research

Copy or export a checked citation record.

Chen J, Chen J, Li L, Wang S, Xie Y. Study on the self-cleaning phenomenon and anti-pollution flashover performance of micro-nanostructure superhydrophobic coating surface under a high humidity environment. Colloids and Surfaces A. 2021;630:127552. doi:10.1016/j.colsurfa.2021.127552.

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