Abstract
Low roll-off angle, high impalement pressure, and mechanical robustness are key requirements for super-liquid-repellent surfaces to realize their potential in applications ranging from gas exchange membranes to protective and self-cleaning materials. Achieving these properties is still a challenge with superamphiphobic surfaces, which can repel both water and low-surface-tension liquids. In addition, fabrication procedures of superamphiphobic surfaces are typically slow and expensive. Here, by making use of liquid flame spray, a silicon dioxide-titanium dioxide nanostructured coating is fabricated at a high velocity up to 0.8 m s-1. After fluorosilanization, the coating is superamphiphobic with excellent transparency and an extremely low roll-off angle; 10 μL drops of n-hexadecane roll off the surface at inclination angles even below 1°. Falling drops bounce off when impacting from a height of 50 cm, demonstrating the high impalement pressure of the coating. The extraordinary properties are due to a pronounced hierarchical nanotexture of the coating.
Original language | English |
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Article number | 1706529 |
Journal | Advanced Materials |
Volume | 30 |
Issue number | 14 |
Early online date | 2018 |
DOIs | |
Publication status | Published - 2018 |
Publication type | A1 Journal article-refereed |
Keywords
- Omniphobic
- Spray coating
- Superhydrophobic
- Superoleophobic
- Wetting
Publication forum classification
- Publication forum level 3
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering