液体 - 固体接口的透滴成像:从沿着滴滴周边的接触角度变化到在表面上的接触角度的映射
Arthur Vieira1, Ville Jokinen2, Sakari Lepikko3,4
1Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, Maarintie 8, 02150 Espoo, Finland.
Langmuir : the ACS journal of surfaces and colloids
|April 15, 2024
概括
这项研究引入了一种新方法,用于测量疏水表面的局部接触角. 这种技术提供了湿性质的详细地图,改善了表面的表征.
科学领域:
- 表面科学是一门学科.
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 滴滴与防水表面的相互作用导致沿三相接触线的接触角度变化.
- 一个单一的平均接触角度并不完全代表这些表面的湿性质.
- 目前的方法在估计不透明疏水表面的局部接触角度方面缺乏有效性.
研究的目的:
- 开发和介绍一种新的方法来估计在不透明的疏水表面上沿着接触线的局部接触角度.
- 为了能够更准确地表示表面湿性质.
- 为了克服现有的接触角度测量技术的局限性.
主要方法:
- 在滑动实验中结合了湿接口的透滴成像.
- 使用滴滴的有限元模型 (FEM) 来估计接触角度.
- 将该方法应用于不透明的疏水表面.
主要成果:
- 成功测量了四个疏水样本 (99°178.9°) 的平均前进和后退接触角度.
- 生成了详细的前进和后退的接触角度地图.
- 实现了3μm的前所未有的分辨率,用于接触角度映射.
结论:
- 本方法有效地估计了在不透明的疏水表面上沿着接触线的局部接触角.
- 与单个平均接触角测量相比,这种技术提供了优越的表面表征.
- 允许对有图案的表面的湿特性进行高分辨率的映射.
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