Parametric Optimization of Inverse Trapezoid Oleophobic Surfaces

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• 作者：Andrea Cavalli ; Peter B酶ggild ; Fridolin Okkels
• 刊名：Langmuir
• 出版年：2012
• 出版时间：December 18, 2012
• 年：2012
• 卷：28
• 期：50
• 页码：17545-17551
• 全文大小：490K
• 年卷期：v.28,no.50(December 18, 2012)
• ISSN：1520-5827

文摘

In this paper, we introduce a comprehensive and versatile approach to the parametric shape optimization of oleophobic surfaces. We evaluate the performance of inverse trapezoid microstructures in terms of three objective parameters: apparent contact angle, maximum sustainable hydrostatic pressure, and mechanical robustness (Im, M. ; Im, H: ; Lee, J.H. ; Yoon, J.B. ; Choi, Y.K. A robust superhydrophobic and superoleophobic surface with inverse-trapezoidal microstructures on a large transparent flexible substrate. Soft Matter2010, 6, 1401鈥?404; Im, M. ; Im, H: ; Lee, J.H. ; Yoon, J.B. ; Choi, Y.K. Analytical Modeling and Thermodynamic Analysis of Robust Superhydrophobic Surfaces with Inverse-Trapezoidal Microstructures. Langmuir2010, 26, 17389鈥?7397). We find that each of these parameters, if considered alone, would give trivial optima, while their interplay provides a well-defined optimal shape and aspect ratio. The inclusion of mechanical robustness in combination with conventional performance characteristics favors solutions relevant for practical applications, as mechanical stability is a critical issue not often addressed in idealized models.