UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

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

Xie, Yi; Xiong, Wei; Kareem, Shefiu; Qiu, Chuxiong; Hu, Yongfei; Parkin, Ivan P; Wang, Shengwu; ... Zhao, Xiujian; + view all (2022) Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances. Nano Research , 15 pp. 7565-7576. 10.1007/s12274-022-4386-3. Green open access

[thumbnail of Parkin_Manuscript without editing marks.pdf]
Preview
Text
Parkin_Manuscript without editing marks.pdf

Download (2MB) | Preview

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.

Type: Article
Title: Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s12274-022-4386-3
Publisher version: https://doi.org/10.1007/s12274-022-4386-3
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: superamphiphobic coatings, superhydrophobic coatings, insulator, pollution flashover voltage, anti-flashover
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10151204
Downloads since deposit
87Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item