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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

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Published on: August 15, 2018

One-level microstructure-arrayed hydrophobic surface with low surface adhesion and strong anti-wetting function.

Liyang Huang^1,2, Yin Yao^1,2, Zhilong Peng^1,2

¹Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|September 22, 2021

Summary

Researchers analyzed one-level microstructures for low adhesion and anti-wetting surfaces. The square frustum-arrayed surface shows potential for near-zero adhesion and infinite anti-wetting capacity, verified by simulations.

Keywords:

low adhesion mono-stable Cassie state one-level strong anti-wetting

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Area of Science:

Surface Science and Engineering
Materials Science
Tribology

Background:

Achieving low surface adhesion and high anti-wetting typically requires complex multi-level micro-nano-structures.
These complex structures face challenges in preparation and are prone to nanostructure damage, leading to functional failure.

Purpose of the Study:

To analyze the surface adhesion and anti-wetting properties of one-level microstructure-arrayed hydrophobic surfaces.
To investigate the feasibility of achieving simultaneous low adhesion and high anti-wetting using simpler surface designs.

Main Methods:

Theoretical analysis using dynamics theory on various one-level microstructures (square pillar, conical table, square frustum).
Numerical simulations to verify theoretical predictions.
Evaluation of critical pressure for anti-wetting and surface adhesion characteristics.

Main Results:

One-level microstructures cannot simultaneously achieve optimal anti-adhesion and anti-wetting performance.
A trade-off exists: minimal adhesion may limit anti-wetting, or both properties remain finite.
Square frustum-arrayed surfaces demonstrate potential for infinite anti-wetting (vanishing inter-structure distance) and near-zero adhesion (reducing to square pyramids).

Conclusions:

Simpler, one-level microstructures present limitations for achieving superior combined adhesion and anti-wetting properties.
The square frustum microstructure offers a promising design pathway for surfaces with exceptional anti-wetting and low adhesion.
Findings provide valuable insights for designing advanced functional surfaces in engineering applications.