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Switchable and reversible wetting properties
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DOI：10.1002/rpm2.70028.png)
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Abstract
En 中文
Controlling surface wettability is essential for various applications such as water harvesting, oil/water separation, and smart skin technologies. Inspired by natural surfaces like lotus leaves and springtails, superhydrophobic materials exhibit water contact angles (CA) > 150 degrees, low sliding angles (SA < 10 degrees), and minimal CA hysteresis. This state is typically achieved via surface structuring and low surface energy coatings, often governed by the Cassie-Baxter model. However, this metastable state can irreversibly transition to the Wenzel state under external energy. Reversible and switchable wettability is attainable by integrating stimuli-responsive materials. This review categorizes different external stimuli capable of modulating wettability: mechanical deformation, temperature, plasma treatment, light (UV), electron input, magnetic fields, solvent interaction, gas exposure, pH sensitivity, counterion exchange, chemical reactions. These strategies offer tailored control over surface-liquid interactions, enabling smart interfaces.
Keywords:
adhesion
reversible
superhydrophilicity
superhydrophobicity
switchable
wettability
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