论文标题
控制液滴固定力在液体注入表面上的因素
Factors Controlling the Pinning Force of Liquid Droplets on Liquid Infused Surfaces
论文作者
论文摘要
液体注入的表面具有部分润湿润滑剂，最近已用于用于众多有趣的应用，例如液滴操纵，液滴收集和自发运动。当使用部分润湿润滑剂时，固定力是可以强烈影响液滴迁移率的关键因素。在这里，我们得出了接触角滞后的分析预测（在半月板大小远小于液滴的情况下}的分析预测，并数值研究其如何由实心分数，润滑剂润湿角和各种流体表面紧张张力控制。我们进一步将液滴在液体注入的表面上经历的接触角滞后和固定力联系在一起，我们对临界滑动角的预测与现有的实验观察一致。最后，我们讨论了为什么与经典的超疏水表面上的液滴相比，与部分润湿剂的液体注入表面上的液滴通常会更强。
Liquid infused surfaces with partially wetting lubricants have recently been exploited for numerous intriguing applications, such as for droplet manipulation, droplet collection and spontaneous motion. When partially wetting lubricants are used, the pinning force is a key factor that can strongly affect droplet mobility. Here, we derive an analytical prediction for contact angle hysteresis {in the limit where the meniscus size is much smaller than the droplet}, and numerically study how it is controlled by the solid fraction, the lubricant wetting angles, and the various fluid surface tensions. We further relate the contact angle hysteresis and the pinning force experienced by a droplet on a liquid infused surface, and our predictions for the critical sliding angles are consistent with existing experimental observations. Finally, we discuss why a droplet on a liquid infused surface with partially wetting lubricants typically experiences stronger pinning compared to a droplet on a classical superhydrophobic surface.
