论文标题
冷凝液滴筛
Condensation Droplet Sieve
论文作者
论文摘要
在滴水过程中出现的大液滴会损害抗雾化/糖霜能力和传热效率等表面特性。如何自发地分离具有控制尺寸的大规模随机分布液滴仍然是一个巨大的挑战。本文中，我们通过制造带有超疏水层的显微镜薄壁晶格（TWL）结构，提出了一种称为冷凝液滴筛的通用溶液。观察到生长的液滴从这个TWL表面跳下，一旦略大于晶格，就有100％的概率。液滴的最大半径和残留体积分别严格限制在16μm和3.2 nl/mm2中，极大地超过了当前的最新水平状态。我们透露，这种极为有效的跳跃归因于相邻晶格之间的合并不匹配和有效分离液滴的耐受性。我们的工作为设计和制造高性能抗大便材料提供了新的视角。
Large droplets emerging during dropwise condensation impair surface properties such as anti-fogging/frosting ability and heat transfer efficiency. How to spontaneously detach massive randomly distributed droplets with controlled sizes has remained a great challenge. Herein, we present a general solution called condensation droplet sieve, through fabricating microscale thin-walled lattice (TWL) structures coated with a superhydrophobic layer. Growing droplets were observed to jumped off this TWL surface with 100% probability once becoming slightly larger than the lattices. The maximum radius and residual volume of droplets were strictly confined to 16 μm and 3.2 nl/mm2 respectively, greatly surpassing the current state of the art. We reveal that this extremely efficient jumping is attributed to the large tolerance of coalescence mismatch and effective isolation of droplets between neighbouring lattices. Our work provides a new perspective for the design and fabrication of high-performance anti-dew materials.
