Abstract

Superhydrophobic surfaces are widely used in many industrial settings, and mainly consist of rough solid protrusions that entrap air to minimize the liquid/solid area. The stability of the superhydrophobic state favors relatively small spacing between protrusions. However, this in turn increases the lateral adhesion force that retards the mobility of drops. Here we propose a novel approach that optimizes both properties simultaneously. Inspired by the hydrophobic leaves of Salvinia molesta and the slippery Nepenthes pitcher plants, we designed a Salvinia-like slippery surface (SSS) consisting of protrusions with slippery heads. We demonstrate that compared to a control surface, the SSS exhibits increased stability against pressure and impact, and enhanced lateral mobility of water drops as well as reduced hydrodynamic drag. We also systematically investigate the wetting dynamics on the SSS. With its easy fabrication and enhanced performance, we envision that SSS will be useful in a variety of fields in industry.

中文翻译：

---

类似鼠尾草的光滑表面，具有稳定且可移动的水/空气接触线

摘要

超疏水表面广泛用于许多工业环境，主要由粗糙的固体突起组成，这些突起捕获空气以最小化液体/固体区域。超疏水状态的稳定性有利于突起之间相对较小的间距。然而，这反过来又增加了阻碍液滴流动的横向粘附力。在这里，我们提出了一种同时优化这两个属性的新方法。受到鼠尾草疏水叶子和光滑的猪笼草猪笼草的启发，我们设计了一种鼠尾草似滑面 (SSS)，由带有滑头的突起组成。我们证明，与控制面相比，SSS 表现出更高的抗压力和冲击稳定性，增强了水滴的横向流动性，并降低了流体动力阻力。我们还系统地研究了 SSS 上的润湿动力学。凭借其易于制造和增强的性能，我们设想 SSS 将在工业的各个领域中发挥作用。