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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); Duan, HL; Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
Source PublicationLANGMUIR
2012-06-01
Volume28Issue:25Pages:9440-9450
ISSN0743-7463
AbstractSubmersed 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.
KeywordContact-angle Hysteresis Rough Surfaces Low Adhesion Transition Cassie States Water Pressure
Subject Area物理力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000305661400033
Funding OrganizationSupport 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.
Department非线性力学国家重点实验室
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46690
Collection非线性力学国家重点实验室
Corresponding AuthorDuan, HL; Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
Recommended Citation
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,Duan, HL,&Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China..(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.
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