Apparent contact angle of drops on liquid infused surfaces: geometric interpretation,Soft Matter

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Apparent contact angle of drops on liquid infused surfaces: geometric interpretation
Soft Matter ( IF 2.9 ) Pub Date : 2021-08-19 , DOI: 10.1039/d1sm00704a
Ciro Semprebon ₁ , Muhammad Subkhi Sadullah ₂ , Glen McHale ₃ , Halim Kusumaatmaja ₄

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We theoretically investigate the apparent contact angle of drops on liquid infused surfaces as a function of the relative size of the wetting ridge and the deposited drop. We provide an intuitive geometrical interpretation whereby the variation in the apparent contact angle is due to the rotation of the Neumann triangle at the lubricant–drop–gas contact line. We also derive linear and quadratic corrections to the apparent contact angle as power series expansion in terms of pressure differences between the lubricant, drop and gas phases. These expressions are much simpler and more compact compared to those previously derived by Semprebon et al. [Soft Matter, 2017, 13, 101–110].

中文翻译：

液体注入表面上液滴的表观接触角：几何解释

我们从理论上研究了液体注入表面上液滴的表观接触角作为润湿脊和沉积液滴的相对尺寸的函数。我们提供了一种直观的几何解释，其中表观接触角的变化是由于诺依曼三角形在润滑剂-液滴-气体接触线上的旋转。我们还根据润滑剂、液滴和气相之间的压差，推导出表观接触角的线性和二次修正，作为幂级数展开。与 Semprebon等人先前推导出的表达式相比，这些表达式更简单、更紧凑。[软物质, 2017, 13 , 101–110]。

更新日期：2021-09-02

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