Superhydrophobic films from raspberry-like particles.
We report a robust procedure for preparing superhydrophobic hybrid films on which the advancing contact angle for water is about 165 degrees and the roll-off angle of a 10-muL water droplet is 3 +/- 1 degrees . Dual-size surface roughness, which mimics the surface topology of self-cleaning plant leaves, originates from well-defined silica-based raspberry-like particles that are covalently bonded to an epoxy-based polymer matrix. The roughened surface is chemically modified with a layer of poly(dimethylsiloxane) (PDMS). The robustness and simplicity of this procedure may make widespread applications of so-prepared superhydrophobic films possible.
Ming
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Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. w.ming@tue.nl
Wu
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van Benthem
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de With
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