In this paper, a facile, inexpensive, and environment-friendly method is developed to construct a superhydrophobic surface with hierarchical micro/nanostructures on the steel substrates. The superhydrophobic surface was fabricated by magnetic agitation of a mixture of micro and nanosized Zinc oxide (ZnO) suspensions on a substrate, after being modified with a low-surface energy monolayer of stearic acid, the as-prepared coating exhibits self-cleaning properties with a water contact angle of 162°and a sliding angle of 6°, and shows the good corrosion resistance. It is believed that the rapid and cheap technique have a promising future application for fabricating superhydrophobic surfaces on steel materials.
We have developed a facile, environmentally friendly, and inexpensive method of creating a large-area superhydrophobic surface on steel substrates by a simple spray-coating method. Scanning electron microscopy, Fourier transform infrared spectrophotometry, and contact angle measurement were used to characterize the surface morphologies and wettability of the surfaces. The results showed that the hydrophobic -CH 3 and -CH 2 -groups were introduced into TiO 2 particles which were modified from hydrophilic to hydrophobic. When the weight ratio of modified TiO 2 to fluorinated polymethylhydrosiloxane was 7:3, the as-prepared coating both the micro/nanobinary structure and the low surface free energy layer exhibited superhydrophobic properties with a water contact angle of 161°and a sliding angle of 5°. In particular, the fluorinated polymethylhydrosiloxane/TiO 2 nanocomposite superhydrophobicity surface has excellent durability and corrosion resistance. These fascinating performances make the present method suitable for large-scale industrial fabrication of chemically stable and anticorrosive superhydrophobic surfaces.
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