Rapid Preparation of Superamphiphobic Surfaces Featuring Re-Entry Characteristics on Magnesium Alloy

Developing a straightforward method for preparing superamphiphobic surfaces holds significant importance for both academia and industry. Despite considerable progress in superamphiphobic surface fabrication techniques, the time-consuming nature of the process and the difficulty in guaranteeing wettability performance mean that simple production of such surfaces remains a challenging task. This paper introduces a simple magnetron sputtering coupled with chemical deposition coating technique for constructing fractal floral structures on AZ91D magnesium alloy. These structures exhibit pronounced biomimetic characteristics and significantly enhance superamphiphobic property through expanded re-entry structures. Beyond demonstrating fostering chemical stability, this surface exhibits outstanding repellency toward rapeseed oil and ethylene glycol. The static contact angles of ethylene glycol, rapeseed oil, and n-hexane are 163.7°, 156.8°, and 152.5°, respectively. This approach for fabricating practical superamphiphobic surfaces offers distinct potential advantages through its low cost and high efficiency. Notably, the entire preparation process takes less than 30 min, presenting an alternative highly efficient approach for synthesizing superamphiphobic surfaces.