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Peer-reviewed publication

2022 · Volume 15 · Issue 8 · Pages 7565-7576

Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances

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Authors and affiliations

  • Yi Xie *State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaDSAN NEW MATERIALS core team
  • Wei XiongState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
  • Shefiu KareemState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
  • Chuxiong QiuState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
  • Yongfei HuState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
  • Ivan P. ParkinDepartment of Chemistry, University College London, London WC1H 0AJ, UK
  • Shengwu WangState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Huayun WangState Grid Jiangxi Electric Power Co., Ltd., Electric Power Research Institute, Nanchang 330096, China
  • Junwu ChenState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaDSAN NEW MATERIALS core team
  • Lee LiState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Zhi ChenWuhan Shuneng New Material Co., LTD, Wuhan 430074, ChinaDSAN NEW MATERIALS core team
  • Huajun SunState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
  • Xiujian ZhaoState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

DSAN NEW MATERIALS core team participation

Research experience connected with DSAN NEW MATERIALS' technical leadership.

Authored by DSAN NEW MATERIALS leaders Yi Xie, Junwu Chen and Zhi Chen; Zhi Chen's declared affiliation is Wuhan Shuneng New Material Co., LTD.

Yi Xie

first author · corresponding author

Paper affiliation: Wuhan University of Technology

Junwu Chen

co-author

Paper affiliation: Huazhong University of Science and Technology

Zhi Chen

co-author · DSAN NEW MATERIALS company-affiliated author

Paper affiliation: Wuhan Shuneng New Material Co., LTD

01

Publisher abstract

Original abstract

Biomimetic superhydrophobic (SH) coatings have emerged as a promising alternative to traditional room temperature vulcanizing (RTV) silicone rubber coatings for improving the flashover strength of insulators. However, organic contamination occurs in outdoor applications and thus a superamphiphobic (SAP) surface is more desirable but not yet reported for improving flashover performance. Herein, we developed a novel anti-flashover technique by fabricating robust SAP coating with unique gradient and micro-nanoscale hierarchical architecture. The SAP coating was fabricated by sequentially spray-depositing a resin-based primer and a silica-based topcoat on substrates (i.e., glass slides and insulators). The primer not only functions as an adhesive offering strong adhesion to the substrate but also offers a micromastoid-like structure facilitating the subsequent formation of hierarchical micro-nanostructure. The appropriate spraying pressure leads to a diffusion of the fluorocarbon-modified silica nanoparticles into the primer to form a unique gradient structure, by analogy to inserting bullets into a wood. These features render the SAP coating excellent robustness with strong abrasive resistance, excellent ultraviolet (UV) resistance, and excellent chemical and thermal stability. Pollution flashover property of the SAP coating was explored and compared with that of SH and RTV specimens, from which a novel organic-contamination model to evaluate the flashover performance was proposed. The coated SAP glass insulator demonstrated 42.9% pollution flashover voltage improvement than RTV-coated insulator. These stated unique features reveal the convincing potential of the present SAP coatings to be applied for not only outdoor transmission line insulators for anti-flashover but also other fields for self-cleaning, anti-fouling, and anti-icing.

02

DSAN NEW MATERIALS editorial interpretation

Why this research matters to material applications.

This study connects the DSAN NEW MATERIALS core team's surface-engineering research with an insulator-focused coating architecture. It shows how a primer/topcoat gradient combines liquid repellency, durability and anti-flashover testing.

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

    A scalable primer-and-topcoat spray process creates a gradient hierarchical micro-nanostructure.

  2. 02

    The coating combines water and oil repellency with abrasion, ultraviolet, chemical and thermal resistance.

  3. 03

    The coated glass insulator produced a 42.9% pollution-flashover-voltage improvement over the RTV-coated specimen under heavy pollution.

  4. 04

    The work proposes an organic-contamination model for evaluating pollution flashover performance.

04

Paper navigation

Contents of the publication.

  1. 1 Introduction
  2. 2 Experimental
  3. 2.1 Materials
  4. 2.2 Preparation of resin-based dispersion
  5. 2.3 Synthesis of silica nanoparticle dispersion and nanoparticle surface modification
  6. 2.4 Fabrication of superamphiphobic and superhydrophobic coatings
  7. 2.5 Materials characterization
  8. 2.6 Flashover test
  9. 3 Results and discussion
  10. 3.1 Fabrication and characterization of SAP coatings
  11. 3.2 Stability and durability of the coatings
  12. 3.3 Pollution leakage current and evaluation model
  13. 3.4 Self-cleaning and pollution flashover performance of coated insulators
  14. 4 Conclusions

05

Cite this research

Copy or export a checked citation record.

Xie Y, Xiong W, Kareem S, et al. Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances. Nano Research. 2022;15(8):7565-7576. doi:10.1007/s12274-022-4386-3.

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