Optimal design of superhydrophobic surfaces using a paraboloid microtexture | |
Department | 固体润滑国家重点实验室(LSL) |
Lu Tie (铁璐)1; Guo ZG(郭志光)1,2,3; Li W(李文)4; Guo ZG(郭志光) | |
The second department | 合成润滑材料组 |
2014 | |
Source Publication | Journal of Colloid and Interface Science |
ISSN | 0021-9797 |
Volume | 436Issue:436Pages:19-28 |
Abstract | Due to the crucial role of surface roughness, it has been recently proposed to design optimal and extract geometrical microstructures for practical fabrications of superhydrophobic surfaces. In this work, a paraboloid microtexture is employed as a typical example to theoretically establish a relationship between surface geometry and superhydrophobic behavior for a final optimal design. In particular, based on a thermodynamic approach, the effects of all the geometrical parameters for such a paraboloid microtexture on free energy (FE) and free energy barrier (FEB) as well as equilibrium contact angle (ECA) and contact angle hysteresis (CAH) of a superhydrophobic surface have been systematically investigated in detail. It is interestingly noted that the droplet position for metastable state is closely related to the intrinsic CA of the surface. Furthermore, the paraboloid base steepness plays a significant important role in ECA and CAH, and a critical steepness is necessary for the transition from noncomposite to composite states, which can be judged using a proposed criterion. Moreover, the superhydrophobicity depends strongly the surface geometrical dimension for noncomposite state, while it is not sensitive for composite state. Additionally, both vibrational energy and geometrical dimension affect the transition from noncomposite to composite wetting states, and a comprehensive criterion for such transition can be obtained. Finally, using such criterion, it is revealed that the paraboloidal protrusion is the most optimal geometry among the three typical microtextures for ideal superhydrophobicity. |
Keyword | Paraboloid Microstructure Superhydrophobic Free Energy Contact Angle |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.jcis.2014.09.009 |
Funding Organization | the National Natural Science Foundation of China under Grant Nos. 11172301 ; 51202082 ; the Western Light Talent Culture project ; the Top Hundred Talents project of Chinese Academy of Sciences |
Indexed By | SCI |
If | 3.368 |
Language | 英语 |
Funding Project | 空间润滑材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/6577 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Guo ZG(郭志光) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Peoples R China 3.Hubei Univ, Key Lab Green Preparat & Applicat Funct Mat, Minist Educ, Wuhan 430062, Peoples R China 4.Hubei Polytech Univ, Huangshi 435003, Peoples R China |
Recommended Citation GB/T 7714 | Lu Tie ,Guo ZG,Li W,et al. Optimal design of superhydrophobic surfaces using a paraboloid microtexture[J]. Journal of Colloid and Interface Science,2014,436(436):19-28. |
APA | Lu Tie ,Guo ZG,Li W,&Guo ZG.(2014).Optimal design of superhydrophobic surfaces using a paraboloid microtexture.Journal of Colloid and Interface Science,436(436),19-28. |
MLA | Lu Tie ,et al."Optimal design of superhydrophobic surfaces using a paraboloid microtexture".Journal of Colloid and Interface Science 436.436(2014):19-28. |
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