Hydrophobicity of curved microstructured surfaces

被引：11
|
作者：
Cannon, A. H. [1 ]
King, W. P. [1 ]
机构：
[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA
来源：
JOURNAL OF MICROMECHANICS AND MICROENGINEERING | 2010年 / 20卷 / 02期
关键词：
SUPERHYDROPHOBIC SURFACE;
D O I：
10.1088/0960-1317/20/2/025018
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents measurements and models for how the macroscopic curvature of microstructured polymers affects hydrophobicity. Flexible polymer substrates were fabricated with arrays of regular microstructures. The interaction of liquid drops with these surfaces was analyzed for flat substrates and substrates flexed into either positive or negative cylindrical shapes. Liquid droplet static contact angle and dynamic slide angle were measured for a range of surfaces. An increase in substrate curvature corresponded with decreased slide angle for liquid droplets suspended on the surface asperities. This phenomenon is investigated in terms of solid-liquid contact line and the periodicity of surface microstructures. We present a model that can be used to understand the observed phenomena and to design microstructure geometries for hydrophobicity.
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页数：6
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