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Robust Superamphiphobic Coatings Based on Raspberry-like Hollow SnO2 Composites
Xinting Han1, Junyan Peng1, Shaohua Jiang2
1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|August 29, 2020
Summary
Researchers developed a robust superamphiphobic coating using raspberry-like hollow SnO2 nanoparticles and FAS-17. This durable coating exhibits excellent water and oil repellency, showing potential for various industrial applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Superhydrophobic surfaces require excellent mechanical and chemical stability for broad applications.
- Developing durable superhydrophobic materials remains a significant challenge in materials science.
Purpose of the Study:
- To prepare a robust superamphiphobic coating with enhanced stability and durability.
- To investigate the potential of hierarchical structures using tin dioxide nanoparticles for superamphiphobic surfaces.
Main Methods:
- Preparation of raspberry-like hollow SnO2 nanoparticles via hydrothermal synthesis and annealing.
- Construction of hierarchical rough surfaces by combining SnO2 with SiO2 nanoparticles.
- Surface modification using 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS-17) and epoxy resin as an adhesive.
Main Results:
- Achieved superamphiphobic coating with water contact angle ~165° and diiodomethane contact angle ~151°.
- Demonstrated excellent chemical and mechanical stability through hot water, salt water corrosion, tape peeling, and kneading tests.
- Facile spray-coating or drop-coating application on various substrates.
Conclusions:
- The developed superamphiphobic coating exhibits remarkable stability and durability.
- The hierarchical structure and surface modification are key to achieving robust superamphiphobicity.
- The coating shows significant potential for real-world applications and industrial production.
