A highly robust, concrete-inspired superhydrophobic nanocomposite coating

Area of Science:

• Materials Science
• Surface Chemistry

Background:

• Durability remains a critical challenge for practical superhydrophobic surface applications.
• Integrating nanoparticles into superhydrophobic coatings often compromises robustness.

Purpose of the Study:

• To fabricate a highly durable superhydrophobic coating inspired by concrete's structure.
• To enhance the robustness and longevity of superhydrophobic surfaces using hybrid resins and categorized fillers.

Main Methods:

• Developed a superhydrophobic coating using a synthesized hydrophobic organic/inorganic hybrid resin.
• Incorporated categorized micro/nano fillers (silica sand, aluminum nanoparticles, PTFE) with optimized content.
• Evaluated coating durability through abrasion tests with sandpaper and sand particle impact.

Main Results:

• The hybrid resin enhanced both hydrophobicity and coating robustness.
• Optimized filler composition resulted in a long abrasion distance and high retention rate of superhydrophobicity.
• The coating maintained superhydrophobicity after significant abrasion (e.g., 10m with 180-grit sandpaper at 22.5 kPa) and particle impact, exhibiting strong substrate adhesion (5B).

Conclusions:

• The developed superhydrophobic coating demonstrates remarkable durability and robustness.
• The concrete-inspired design with hybrid resin and categorized fillers offers a promising strategy for durable superhydrophobic surfaces.
• Potential applications include self-cleaning, anti-icing, and anti-fouling technologies in various industries.