Abstract
Dense copper oxide nanoribbons arrays are prepared on a copper sheet by using a low-temperature hydrothermal method. The wettability of the surface modified by stearic acid is superhydrophobic, and the water contact angle is 153.6°. It is demonstrated that the reversible transition from superhydrophilicity to superhydrophobicity is successfully achieved by heat treatment and re-modification, and the whole process can be accomplished in 170 s. Potentiodynamic polarization curves and Nyquist curves show that these superhydrophobic surfaces have good corrosion resistance and superior durability.
Highlights
The superwetting surface has attracted considerable research interest due to its important application in self-cleaning, oil/water separation, corrosion resistance, and so on (Forooshani et al, 2017a; Bagheri et al, 2017; Forooshani et al, 2017b; Bagheri et al, 2018; Forooshani et al, 2019; BaratiDarband et al, 2020; Hatte and Pitchumani, 2021)
A surface with water contact angles (WCAs) greater than 150° and slide angles less than 10° is called the superhydrophobic surface (Taghvaei et al, 2021)
The copper sheet-based copper oxide nanoribbons arrays are fabricated through a simple low temperature hydrothermal method
Summary
The superwetting surface has attracted considerable research interest due to its important application in self-cleaning, oil/water separation, corrosion resistance, and so on (Forooshani et al, 2017a; Bagheri et al, 2017; Forooshani et al, 2017b; Bagheri et al, 2018; Forooshani et al, 2019; BaratiDarband et al, 2020; Hatte and Pitchumani, 2021). The first step is to prepare a rough structure on a solid surface through various methods, and the second step is to modify with low surface energy substances (Yu et al, 2021). Among the mentioned external stimuli, UV has been extensively employed, because some photocatalytic materials, such as ZnO, TiO2, and SnO2, can realize wettability transition under UV irradiation (Velayi and Norouzbeigi, 2019). These reported methods have many drawbacks, such as long transition time, complex fabrication process, and high costs.
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