Superhydrophobic floatability of a hydrophilic object driven by edge effect

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题名:	Superhydrophobic floatability of a hydrophilic object driven by edge effect
作者:	Chang,FM;Sheng,YJ;Tsao,HK
贡献者:	化學工程與材料工程學系
关键词:	SURFACES;RESISTANCE;WATER
日期:	2009
上传时间:	2010-06-29 17:28:05 (UTC+8)
出版者:	中央大學
摘要:	It is generally believed that a water-repellent surface is necessary for small insects to stand on water. Through a combined experimental and theoretical study, we demonstrate that an object with hydrophilic surface can float with apparent contact angle greater than 90 degrees due to edge effect. The apparent contact angle rises with increasing loading even to a value typically displayed only by superhydrophobic surfaces. On the basis of free energy minimization, two regimes are identified. When buoyancy controls, the meniscus meets the object with the intrinsic contact angle. As surface tension dominates, however, contact angle is regulated by total force balance.
關聯:	APPLIED PHYSICS LETTERS
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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