Preparation of anisotropic superhydrophobic titanium alloy surface and analysis of droplet icing performance

Abstract

Inspired by various surfaces in nature, superhydrophobic surfaces have attracted significant research interest as functionalized surfaces over the past decades. In this work, titanium alloy (Ti-6Al-4V) surfaces with superhydrophobicity were prepared through rapid controlled laser ablation and chemical modification. Achieving water contact angles (WCAs) of approximately 159°, and the sliding angles (SAs) of surfaces with varying structures exhibited anisotropy. Additionally, droplet freezing experiments were performed on the superhydrophobic surfaces, demonstrating their effectiveness in delaying icing. The droplet freezing time was extended approximately twofold compared to smooth substrate surfaces. The rebound behavior of droplets impacting superhydrophobic and hydrophobic surfaces at varying Weber numbers (We) was investigated, revealing that superhydrophobic surfaces significantly reduce the contact time between droplets and the surfaces. This convenient preparation method is anticipated to enhance the properties of titanium alloy surfaces, thereby broadening their potential applications. This study provides valuable insights into potential applications across construction, transportation, and microdevices.