Recent Study Topics on the Static and Dynamic Wettability of Water Droplets on Various Hydrophobic Solid Surfaces

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  • SAKAI Munetoshi
    Research and Innovation Center, Ibaraki University
  • NAKAJIMA Akira
    Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology

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  • 撥水性固体表面における水滴の静的動的濡れ性に関する研究の最近のトピックス
  • ハッスイセイ コタイ ヒョウメン ニ オケル スイテキ ノ セイテキ ドウテキ ヌレ セイ ニ カンスル ケンキュウ ノ サイキン ノ トピックス

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Abstract

<p>Water repellency is an important surface finishing technology in various industries because chemical reactions or bond formation through water are limited on a hydrophobic surface. The hydrophobicity of the solid surface is divided into two categories: static and dynamic hydrophobicity. Recently, thanks to rapid advance and availability of high-speed cameras, CPUs, and surface nano-scale characterization techniques such as AFM, the number of research reports on dynamic hydrophobicity has increased, and the content has advanced remarkably. Technologies for droplet manipulation by internal factors of solids or external fields made a great progress through these researches and they have become a key part in designing various industrial devices. The importance of static and dynamic hydrophobicity is rapidly increasing, and merging fluid dynamics considerations with solid surface or interface chemistry is a clear trend in this field. This paper presents research topics related to static and dynamic hydrophobicity of solids in recent 4~5 years.</p>

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