Optimal design of superhydrophobic surfaces using a paraboloid microtexture | |
Tie L(铁璐)1![]() ![]() ![]() | |
刊名 | Journal of Colloid and Interface Science
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2014 | |
卷号 | 436页码:19-28 |
关键词 | Paraboloid microstructure Superhydrophobic Free energy Contact angle |
ISSN号 | 0021-9797 |
通讯作者 | 郭志光 |
英文摘要 | 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. |
学科主题 | 材料科学与物理化学 |
收录类别 | SCI |
资助信息 | 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 |
语种 | 英语 |
WOS记录号 | WOS:000344441700004 |
公开日期 | 2014-10-21 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/6577] ![]() |
专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Guo ZG(郭志光) |
作者单位 | 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 |
推荐引用方式 GB/T 7714 | Tie L,Guo ZG,Li W,et al. Optimal design of superhydrophobic surfaces using a paraboloid microtexture[J]. Journal of Colloid and Interface Science,2014,436:19-28. |
APA | Tie L,Guo ZG,Li W,&郭志光.(2014).Optimal design of superhydrophobic surfaces using a paraboloid microtexture.Journal of Colloid and Interface Science,436,19-28. |
MLA | Tie L,et al."Optimal design of superhydrophobic surfaces using a paraboloid microtexture".Journal of Colloid and Interface Science 436(2014):19-28. |
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