A durable superhydrophobic coating based on inherent nano/micro-integrated materials

Yuxing Bai, Haiping Zhang, Jesse Zhu, Yuanyuan Shao, Hui Zhang

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

Superhydrophobic coating has been a research focus due to its self-cleaning, anti-fouling, anti-corrosion resistance properties, etc. However, poor durability of superhydrophobic coating affects its service life. In this study, we develop a durable superhydrophobic polyester (PE)/SiO2-perfluorooctyltriethoxysilane (PFOTES) (PSP) coating using a dual-spraying method. Two grades of mesoporous SiO2 particles with inherent nano/micro-integrated (NMI) geometry are successfully embedded into organic PE matrix achieving a stable rough structure under the action of interfacial wetting and chemical-bonding, which greatly reduces the difficulty in constructing hierarchical structure. The micro-scale particles work as both the microstructure important for the superhydrophobic surface and a protective framework for the nanostructure, and thus improve the robustness of superhydrophobic coatings. Significantly, the newly exposed low-surface-energy nanopore feature of PSP coatings are advantageous in maintaining a stable superhydrophobicity after being abraded, and the PSP coatings display good adhesion performance because of dual-interfacial interactions. Moreover, the superhydrophobic coatings possess excellent self-cleaning, anti-fouling and bouncing performances, and they can retain superhydrophobicity after a prolonged exposure to ultraviolet radiation and immersion in strong acid/alkaline solutions. Porous SiO2 particles, taking advantage of its superiority as an NMI structural material, provide a promising candidate for preparing durable superhydrophobic coatings endowing with necessary stable hierarchical roughness.

Original languageEnglish
Article number107854
JournalProgress in Organic Coatings
Volume184
DOIs
Publication statusPublished - Nov 2023

Keywords

  • Durability
  • Interfacial interaction
  • Mesoporous SiO
  • Nano/micro-integrated geometry
  • Superhydrophobic coating
  • Wetting effect

ASJC Scopus subject areas

  • General Chemical Engineering
  • Surfaces, Coatings and Films
  • Organic Chemistry
  • Materials Chemistry

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