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Optimal design of superhydrophobic surfaces using a paraboloid microtexture.
J Colloid Interface Sci 2014; 436:19-28JC

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.

Authors+Show Affiliations

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China. Electronic address: zguo@licp.cas.cn.Hubei Polytechnic University, Huangshi 435003, China. Electronic address: wenl@ualberta.ca.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25265581

Citation

Tie, Lu, et al. "Optimal Design of Superhydrophobic Surfaces Using a Paraboloid Microtexture." Journal of Colloid and Interface Science, vol. 436, 2014, pp. 19-28.
Tie L, Guo Z, Li W. Optimal design of superhydrophobic surfaces using a paraboloid microtexture. J Colloid Interface Sci. 2014;436:19-28.
Tie, L., Guo, Z., & Li, W. (2014). Optimal design of superhydrophobic surfaces using a paraboloid microtexture. Journal of Colloid and Interface Science, 436, pp. 19-28. doi:10.1016/j.jcis.2014.09.009.
Tie L, Guo Z, Li W. Optimal Design of Superhydrophobic Surfaces Using a Paraboloid Microtexture. J Colloid Interface Sci. 2014 Dec 15;436:19-28. PubMed PMID: 25265581.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Optimal design of superhydrophobic surfaces using a paraboloid microtexture. AU - Tie,Lu, AU - Guo,Zhiguang, AU - Li,Wen, Y1 - 2014/09/16/ PY - 2014/07/25/received PY - 2014/09/05/revised PY - 2014/09/08/accepted PY - 2014/9/30/entrez PY - 2014/9/30/pubmed PY - 2015/9/9/medline KW - Contact angle KW - Free energy KW - Paraboloid microstructure KW - Superhydrophobic SP - 19 EP - 28 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 436 N2 - 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. SN - 1095-7103 UR - https://www.unboundmedicine.com/medline/citation/25265581/Optimal_design_of_superhydrophobic_surfaces_using_a_paraboloid_microtexture_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(14)00658-4 DB - PRIME DP - Unbound Medicine ER -