Abstract
Self-cleaning superhydrophobic coatings with water contact angle as high as 156° and sliding angle as low as 3° were prepared through a facile one-step spray coating process by spraying the hydrophobic silica nanoparticles onto Al substrate. In addition, the superhydrophobic coatings maintained excellent electrochemical corrosion resistance in a 3.5 wt% NaCl aqueous solution. The corrosion behavior of the superhydrophobic coatings on the Al substrate was characterized by the polarization curve and electrochemical impedance spectroscopy. The results indicated that the superhydrophobic coatings possessed excellent corrosion resistance. In addition, liquid marbles coated with hydrophobic silica nanoparticles were prepared by gentle rolling of liquid on powder beds of hydrophobic silica nanoparticles. Furthermore, water evaporation from the silica shell with time evolution was investigated using a contact angle measurement system video camera.
Graphical Abstract
Superhydrophobic silica surface with excellent corrosion resistance and liquid marbles coated with hydrophobic silica were fabricated by a facile process.
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The work is supported by the National Natural Science Foundation of China (Grants 21301141 and 21261021) and the Nature Science Foundation of Gansu Province, China (Grant 145RJYA241).
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Li, J., Zhao, Z., Zhang, Y. et al. Facile fabrication of superhydrophobic silica coatings with excellent corrosion resistance and liquid marbles. J Sol-Gel Sci Technol 80, 208–214 (2016). https://doi.org/10.1007/s10971-016-4076-2
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DOI: https://doi.org/10.1007/s10971-016-4076-2