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Mechanically robust superamphiphobic aluminum surface with nanopore-embedded microtexture.

Sumit Barthwal¹, Young Su Kim, Si-Hyung Lim

¹Department of Bio and Nano Chemistry, Kookmin University , Seoul 136-702, South Korea.

Langmuir : the ACS Journal of Surfaces and Colloids

|August 29, 2013

Summary

Researchers developed a simple method to create durable superamphiphobic surfaces on aluminum plates. This robust surface repels various liquids and maintains its properties after mechanical stress, suitable for industrial applications.

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Area of Science:

Materials Science
Surface Engineering
Nanotechnology

Background:

Developing superamphiphobic surfaces is crucial for applications requiring liquid repellency.
Existing methods often lack mechanical robustness or scalability.
Aluminum surfaces offer potential for widespread use if surface properties can be enhanced.

Purpose of the Study:

To develop a simple and mechanically robust superamphiphobic surface on aluminum (Al) plates.
To investigate the effect of dual micro- and nanoscale architectures on surface wettability and durability.
To assess the potential for large-scale industrial fabrication.

Main Methods:

Fabrication of microscale plateaus on Al via chemical etching.
Formation of nanopores through anodization, with varying anodization times.

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Surface functionalization via fluorination to achieve superamphobicity.

Main Results:

The fabricated Al surface demonstrated super-repellency to liquids with surface tensions from 27.5 to 72 mN/m.
Mechanical tests (Scotch tape, hardness) confirmed the surface's robust adhesion and durability.
The superamphiphobic properties were retained after mechanical stress and long-term storage.

Conclusions:

A simple, time-saving technique yields mechanically robust superamphiphobic Al surfaces.
The dual-scale architecture enhances durability and liquid repellency.
The method is scalable and applicable to large-area, three-dimensional surfaces for industrial use.