Roughness effects on contact angle measurements
Roughness effects on contact angle measurements
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DOI：
10.1119/1.2952446
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发表时间：
2008-10
影响因子：
0.9
通讯作者：
Bernard J. Ryan;K. Poduska
中科院分区：
文献类型：
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作者：
Bernard J. Ryan;K. Poduska
我们开发了一种简单且经济的程序来证明粗糙度和润湿分数对固体表面上液滴的平衡接触角的影响。放置在粗糙表面上的液滴的接触角（仅润湿表面的一部分）大于由蒸汽冷凝形成的液滴的接触角，后者更完全地润湿表面。这些接触角数据有助于评估由于表面粗糙化而导致的真实表面积的变化，以及由于粗糙表面和水滴之间形成的气穴而导致的水滴部分接触面积的变化。
We have developed a simple and economical procedure to demonstrate the effects of roughness and wetting fraction on the equilibrium contact angles of liquid droplets on solid surfaces. Contact angles for droplets placed on a rough surface, which wet only a portion of the surface, are larger than the contact angles of droplets formed by condensation of steam, which wet the surface more completely. These contact angle data facilitate assessments of changes in true surface area, due to surface roughening, as well as changes in the fractional contact areas of the water droplets, due to the formation of air pockets between the rough surface and the droplet.