Switchable and Reversible Superhydrophobic Surfaces: Part One

Abstract

In this chapter, most of the methods used in the literature to prepare switchable and reversible superhydrophobic surfaces are described. Inspired by Nature, it is possible to induce the Cassie-BaxterÀWenzel transition using different external stimuli such as light, temperature, pH, ion exchange, voltage, magnetic field, mechanic stress, plasma, ultrasonication, solvent, gas or guest. Such properties are extremely important for various applications but especially for controllable oil/water separation membranes, oilabsorbing materials and water harvesting systems.

Owens–Wendt Method for Comparing the UV Stability of Spontaneous Liquid-Repellency with Wet Chemical Treatment of Laser-Textured Stainless Steel

“…The sample was then returned to its initial hydrophilic state after UV irradiation [73] to illustrate the reversibility of the wetting transition. It is worth mentioning the general trends in the wetting transition on a variety of metal oxide surfaces (ZnO, TiO2, Bi2O3), described in detail in [74]. The hydrophobicity of the samples decreased after UV treatment, which was associated with the oxidation of the thin absorbed organic layer, but was restored in air or after heat treatment.…”

Experimental Investigation of the Wettability of Protective Glove Materials: A Biomimetic Perspective

“…A variety of treatment methods are available for the design of structural solutions suitable for the intended purpose. Of particular importance are the hydrophobic properties of polymeric surfaces [9,10], which are often determined by their morphology and roughness, as well as chemical composition. The application of, amongst others, fl uorine compounds, leads to very low values of surface free energy (SFE).…”