Abstract
A chemical etching technique is used to prepare a superhydrophobic surface with a honeycomb rough structure on the aluminum surface. Use SEM, Optical contact angle meter and Surface tension detector to characterize the etched aluminum substrate. After the 8th etching, the surface of the sample showed the morphology of micro/nano-scale honeycomb pores and protrusions, and the water contact angle (WCA) is 135°. After being modified with octadecanethiol methanol solution, WCA is 153.1°. After modification, the contact angle of the sample surface decreases with the increase of the glucose solution concentration. When the glucose solution concentration reaches 1000 mg/L, the superhydrophobicity is lost.
Highlights
Wetting is one of the most common phenomena in nature, and wettability is the core issue of many biological processes, engineering and technology [1]
A chemical etching technique is used to prepare a superhydrophobic surface with a honeycomb rough structure on the aluminum surface
The contact angle of the sample surface decreases with the increase of the glucose solution concentration
Summary
Wetting is one of the most common phenomena in nature, and wettability is the core issue of many biological processes, engineering and technology [1]. The preparation of superhydrophobic surfaces requires increased roughness and reduced surface energy [6]. The preparation of superhydrophobic surfaces on aluminum substrates by chemical etching and low surface energy material modification is an extremely simple and low-cost method, which has attracted wide attention. B. Yin et al etched 2024 Al in hydrofluoric acid and HCl solutions, and surface-modified with fluorosilane (SC-1060F) to obtain a super-hydrophobic surface with a lotus-like papillary structure [8]. Amani Khaskhoussi et al used boiling water, HNO3/HCl etching or HF/HCl etching to achieve surface roughening, and reduced the surface energy by octadecyltrimethoxysilane (TCODS) to prepare a nano/micro-roughness dual layer structure on the surface of 6082-T6 Al [10]. A superhydrophobic surface was prepared by combining two roughening methods with low surface energy self-assembled alkyl mercaptans on a 1100 Al substrate. Using the preparation of super-hydrophobic surface, the relationship between different concentrations of glucose solution and its contact angle was analyzed
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