Recent Topics on Dynamic Hydrophobicity of Solid Surfaces

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  • SAKAI Munetoshi
    Strategic Coordination of Research and Intellectual Properties, Meiji University
  • NAKAJIMA Akira
    Department of Materials Science and Engineering, School of Materials and Chemical Technology

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  • 固体表面の動的撥水性に関する最近の話題
  • コタイ ヒョウメン ノ ドウテキハツスイセイ ニ カンスル サイキン ノ ワダイ

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Abstract

<p>Hydrophobicity of a solid surface is divisible into two categories: static hydrophobicity and dynamic hydrophobicity. For improved performance of water-repellent surfaces, dynamic hydrophobicity has been investigated frequently as an important subject in various industrial fields. Conventionally, dynamic hydrophobicity has been evaluated by measuring the motion of water droplets laid “gently” on an inclined surface. However, from a practical standpoint (e.g. rain dropping onto a building roof), the droplet motion on a surface must be considered for various situations, such as “impact”. Recent collaborative discussions related to surface chemistry or materials science and fluid mechanics are increasing and becoming indispensable for elucidating the dynamic hydrophobicity on a solid surface. Furthermore, recently developed hydrophobic materials such as solid-liquid bulk composites provide unique dynamic hydrophobicity, which is difficult to understand from knowledge of normal solid hydrophobic materials. This paper presents recent research topics related to dynamic hydrophobicity.</p>

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