Static and dynamic characterization of droplets on hydrophobic surfaces

• 来源期刊: 科学通报(英文版)
• 学科: 物理学
• 年，卷（期）: 2012,（10）
• 页码范围: 1095-1101
• 页数: 7页
• 分类号: O351
• 语种: 中文

摘要

We report on our study of the static and dynamic wetting property of hydrophobic surfaces with micro-and dual micro/nano-scale structures.Simulations based on the lattice Boltzmann method showed that the apparent contact angle of water droplets on hy-drophobic surfaces with micro-scale structures increases as solid area decreases,whereas dual micro/nano-scale structures not only increase surface hydrophobicity but also greatly stabilize the Cassie state of droplets.Droplets falling on a superhydrophobic surface distort and,depending of free energy,sometimes bounced on the surface before finally adhering to the surface.These phenomena are in agreement with experimental observations.Simulated results also show that micro/nano-scale surface structures can increase droplet rebound height,which depends on static apparent contact angle.