Fabrication of Different Morphologies Micro-/nano- Dual-scale Super-hydrophobic Al2O3 Surface

Wei Hu; Dafeng Yang; Guoquan Liu; Changbing Chen

doi:10.54097/hset.v20i.3221

Authors

Wei Hu
Dafeng Yang
Guoquan Liu
Changbing Chen

DOI:

https://doi.org/10.54097/hset.v20i.3221

Keywords:

Al2O3 Surface; Large Contact Angle CA; Super-hydrophobic.

Abstract

The preparation of super-hydrophobic surface by alumina usually uses indirect assembly methods, such as template method, deposition method, sol-gel method, etc., and super-hydrophobic Al₂O₃ surface with different micro-/nano- dual-scale structure is rarely obtained by direct oxidation method. In this study, lotus leaf-like super-hydrophobic surface alumina films with different micro-/nano- dual-scale structures were prepared by third-step anodic oxidation, no other assembly steps are required. The changes of surface morphology, hydrophobic property of Al₂O₃ films under different length of time of third-step anodization were analyzed, the results prove that the super-hydrophobic Al₂O₃ films have large contact angle CA (CAmax=158.6°).

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