Ultrafast Processing of Hierarchical Nanotexture for a Transparent Superamphiphobic Coating with Extremely Low Roll-Off Angle and High Impalement Pressure

Advanced Materials
Hannu TeisalaHans-Jürgen Butt

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.

References

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Citations

Jun 4, 2019·Advanced Materials·Kolleboyina JayaramuluRoland A Fischer
Oct 21, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Zhe LiChoon Hwai Yap
Feb 9, 2021·Chemical Society Reviews·Wenluan ZhangXu Deng
Mar 10, 2021·ACS Applied Materials & Interfaces·Heng LuoNing Zhao
May 7, 2021·Advanced Materials·Jie LiuHans-Jürgen Butt
Aug 9, 2021·Advanced Materials·Katharina I HegnerDoris Vollmer
Nov 27, 2018·ACS Applied Materials & Interfaces·Shuantao DongJunping Zhang
Sep 25, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Mimmi ErikssonAgne Swerin
Nov 23, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Hannu Teisala, Hans-Jürgen Butt
Sep 9, 2021·ACS Applied Materials & Interfaces·Jiang LiYuxiang Huang

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