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Adhesion Reduction at Solid/Liquid Interfaces Based on Topologically Optimized Microtextures
Zhen Li1,2, Yeming Han1, Jianyu Zhang1
1State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun 130033, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 23, 2024
Summary
Artificial microtextures designed with topology optimization significantly reduce liquid adhesion by 45%. These robust microtextures maintain the Cassie-Baxter state, improving droplet sliding and reducing drag and bioadhesion.
Area of Science:
- Surface Science and Engineering
- Materials Science
- Microfluidics
Background:
- Chemical coatings for adhesion reduction have vulnerabilities.
- Current microtextures often lack manufacturability due to complex designs.
- Topology optimization offers a method to design manufacturable microstructures.
Purpose of the Study:
- To reduce liquid adhesion on solid surfaces using artificial microtextures.
- To design microtextures via topology optimization for enhanced performance.
- To investigate the wetting behavior and adhesion reduction capabilities of these microtextures.
Main Methods:
- Inverse design of hexagonal periodic microtextures using topology optimization.
- Fabrication of polydimethylsiloxane (PDMS) microtextures via soft lithography.
- Measurement of liquid adhesion using the tilting plate method.
Main Results:
- Topologically optimized microtextures reduced liquid adhesion by 45.0%.
- Achieved significant adhesion reduction through a robust Cassie-Baxter wetting state.
- Demonstrated robust Cassie-Baxter state underwater and accelerated droplet sliding.
Conclusions:
- Topology optimization is effective for designing manufacturable microtextures for adhesion reduction.
- The designed microtextures offer significant performance benefits in reducing liquid adhesion.
- Potential applications include reducing underwater drag and bioadhesion.
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