The Effect of Oleylamine on the Morphology and Hydrophobic Properties of Micro–Nano Structures with Al(OH)3 and AlOOH in an Al–Li Alloy

Micro–nano structures with hydrophobic properties are promising in self-cleaning, anti-corrosion, and anti-icing performance. Here, we report a solvothermal method to construct micro–nano structures on Al–Li alloy by introduction oleylamine. The results show the concentration of oleylamine has an effect on morphology and hydrophobic property of micro–nano structures formed on Al–Li alloy. The X-ray diffraction results indicates the micro–nano structure is mixture with AlOOH and Al(OH) 3 . When the concentration of oleylamine is about 0.48 mol/L, the length of micro–nano structures is up to microscale, the width of micro–nano structures is about 100–200 nm, and the water contact angle can achieve 152.3°. Graphical A hydrothermal solution was prepared by mixing oleylamine, sodium formate, and DMF. Then, the uniform mixed solution was successfully used to prepare micro–nano structures on the surface of Al–Li alloy by a one-step hydrothermal method. The results show that when the concentration of oleylamine reaches the optimal level (0.48 mol/L), the micro–nano structure is uniform and the voids are filled with air, thus forming a superhydrophobic state.