Importance of hierarchical structures in wetting stability on submersed superhydrophobic surfaces

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	Importance of hierarchical structures in wetting stability on submersed superhydrophobic surfaces
	Xue YH; Chu SG; Lv PY; Duan HL(段慧玲)
刊名	LANGMUIR
	2012-06-01
通讯作者邮箱	hlduan@pku.edu.cn
卷号	28 期号:25 页码:9440-9450
关键词	Contact-Angle Hysteresis Rough Surfaces Low Adhesion Transition Cassie States Water Pressure
ISSN号	0743-7463
通讯作者	Duan, HL ; Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
产权排序	[Xue, Yahui;Chu, Shigan; Lv, Pengyu; Duan, Huiling] Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China; [Duan, Huiling] Peking Univ, CAPT, Key Lab High Energy Dens Phys Simulat HEDPS, Beijing 100871, Peoples R China; [Duan, Huiling] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
合作状况	国内
中文摘要	Submersed superhydrophobic surfaces exhibit great potential for reducing flow resistance in microchannels and drag of submersed bodies. However, the low stability of liquid-air interfaces on those surfaces limits the scope of their application, especially under high liquid pressure. In this paper, we first investigate the wetting states on submersed hydrophobic surfaces with one-level structure under hydrostatic pressure. Different equilibrium states based on free-energy minimization are formulated, and their stabilities are analyzed as well. Then, by comparison with the existing numerical and experimental studies, we confirm that a new metastable state, which happens after depinning of the three-phase contact line (TCL), exists. Finally, we show that a strategy of using hierarchical structures can strengthen the TCL pinning of the liquid-air interface in the metastable state. Therefore, the hierarchical structure on submersed surfaces is important to further improve the stability of superhydrophobicity under high liquid pressure.
学科主题	物理力学
分类号	一类
收录类别	SCI ; EI
资助信息	Support by the following agencies and program is acknowledged: Major State Basic Research Development Program of China (Grant no. 2011CB013101). National Natural Science Foundation of China under Grants 10872003, 10932001 and 11172001;Program for the Author of National Excellent Doctoral Dissertation of China (grant no. 2007B2). Huiling Duan would like to acknowledge the Alexander von Humboldt (AvH) foundation to support this work through project "Mechanics theory of materials with complex surfaces and its applications" in the frame of the AvH program for funding a research group linkage.
原文出处	http://dx.doi.org/10.1021/la300331e
语种	英语
WOS记录号	WOS:000305661400033
公开日期	2013-01-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46690]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Xue YH,Chu SG,Lv PY,et al. Importance of hierarchical structures in wetting stability on submersed superhydrophobic surfaces[J]. LANGMUIR,2012,28(25):9440-9450.
APA	Xue YH,Chu SG,Lv PY,&Duan HL.(2012).Importance of hierarchical structures in wetting stability on submersed superhydrophobic surfaces.LANGMUIR,28(25),9440-9450.
MLA	Xue YH,et al."Importance of hierarchical structures in wetting stability on submersed superhydrophobic surfaces".LANGMUIR 28.25(2012):9440-9450.