Robust superamphiphobic coating for oil repellency and other versatility prepared via one-step spraying

• Published in: Surfaces and interfaces 2024-08, Vol.51, p.104672, Article 104672
• Main Authors: Yu, Zhao-Peng, Kang, Lei, Song, Yun-Yun, Xue, Xiao-Lei, Liu, Yan, Zhang, You-Fa
• Format: Article
• Language: English
• Subjects: Chemical stability; Mechanical durability; Nano-/nano hierarchical structure; Oil repellency; One-step spraying; Superamphiphobic
• ISSN: 2468-0230; 2468-0230
• DOI: 10.1016/j.surfin.2024.104672

Special reentrant geometries can effectively trap air pockets and achieve superamphiphobic performance. However, due to the strong dependence on rough structure, the superamphiphobic surfaces usually introduce adhesives to improve their lifespan and durability, but it makes the processing more complicated. Here, a bioinspired superamphiphobic coating with the adhesive was fabricated by a one-step spraying technique including fluorinated SiO2 with different particle sizes, which were employed to create a nano-/nano hierarchical structure with high roughness and low surface energy groups. The prepared coating revealed excellent repellency and high stability, towards various liquids with low surface tension and high viscosity and demonstrated a long-term repellency for oil droplets and fumes for 90 days. Even upon exposure to mechanical damage and chemical corrosion, the coating exhibited strong repellency for water and various oils (contact angle >150°). Besides, droplets could be manipulated along various patterned tracks on the superamphiphobic coating. Thus, this work can provide new insight into superamphiphobic coatings design and make it more adaptable to practical industrial applications. [Display omitted] A robust superamphiphobic coating was produced with excellent repellency for liquid with low surface tension and high viscosity because of thicker air pockets.