Fabrication of pinecone-like structure superhydrophobic surface on titanium substrate and its self-cleaning property

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2016-04, Vol.290, p.82-90
• Main Authors: Li, Shou-Yi, Li, Yan, Wang, Jian, Nan, Ya-Gong, Ma, Bao-Hong, Liu, Zhen-Lai, Gu, Jian-Xiong
• Format: Article
• Language: English
• Subjects: Anodization; Anodizing; Contact angle; Corrosion prevention; Economics; Milk; Nanostructure; Pinecone-like structure; Stability and self-cleaning; Superhydrophobic; Surface energy; Titanium; Wettability
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2016.01.014

[Display omitted] •A pinecone-like superhydrophobic surface was fabricated on the Ti substrate.•Superhydrophobic surface with long-term stability and self-clearing property.•The largest static contact angle of 161.4° and ultra low slide angle of near to 0° were obtained.•The surface show superhydrophobic properties for other droplets (tea, vinegar, coffee and milk). A superhydrophobic surface was fabricated via an economical, simple, and highly effective anodization process combined with a low surface energy modifying. The surface exhibited rough microprotrusions consist of nanoflakes morphology, which is quite similar to the structure of the pinecone. The pinecone-like microstructures and the wettability of the surfaces could be easily adjusted by anodization parameters including anodization time and voltage. Besides a maximum water contact angle of 161.4°±1.5° and an extremely low sliding angle of about 0°, as prepared surface with pinecone-like hierarchical rough structure together with a chemical modification exhibited superhydrophobicity with other liquids such as tea, vinegar, coffee and milk. Moreover, this type of superhydrophobic surfaces prepared by this method was proven to have a good long-term stability, mechanical robustness, self-cleaning effect and anticorrosion.