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Thursday, 19 September 2019
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Raw materials & technologies, Technologies, Functional coatings

One-step process for the construction of a superhydrophobic surface

Tuesday, 25 October 2016

A simple, one-step method has been developed to construct a corrosion-resistant bionic superhydrophobic surface by solve-thermal process in an ethanol and water solution containing stearic acid.

A one-step solve-thermal process was used to prepare a superhydrophobic surface. Source: Serghei Velusceac/fotolia.com

A one-step solve-thermal process was used to prepare a superhydrophobic surface. Source: Serghei Velusceac/fotolia.com

A superhydrophobic surface with biomimetic micronanostructures was prepared in this study. The Mammillaria herrerae-like microspheres, carnation-like microclusters and carnation-petal-like nanoslices of biomimetic micronanostructures on magnesium alloy surface can create a stable superhydrophobic surface, which is similar to the "lotus leaf” structure.

Improving the corrosion properties of magnesium alloy

The as-prepared superhydrophobic surface had a contact angle of 158.5° and a sliding angle of 2.0°. It was characterised by means of scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and contact angle measurement. Potentiodynamic polarisation measurements demonstrated that the superhydrophobic surface greatly improved the corrosion properties of magnesium alloy in 3.5 wt% NaCl solution.

The study is published in: Progress in Organic Coatings, Volume 100, November 2016, Pages 56–62.

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