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- 저자 : Gaasuren Davaasuren (검색결과 1 건)
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Transparency and Superhydrophobicity of Cone-Shaped Micropillar Array Textured Polydimethylsiloxane
Chi-Vinh Ngo,Gaasuren Davaasuren,오현석,천두만 한국정밀공학회 2015 International Journal of Precision Engineering and Vol.16 No.7
Transparent superhydrophobic surfaces have great potential for application to self-cleaning transparent windows. We suggest a fabrication method that combines laser beam machining and polymer casting. A UV nanosecond pulsed laser was used to machine arrays of holes into molds composed of 6061 aluminum alloy. Then, polydimethylsiloxane was cast into the laser-machined molds. To study the effects of the array geometry on superhydrophobicity and transparency, a series of micropillar arrays with different step sizes were fabricated. As a result, the critical step size at which the surfaces changed from hydrophobic to superhydrophobic was found to be approximately 80 μm. Cone-shaped micropillar arrays with 80 μm step size showed 175° maximum water droplet contact angle and were highly transparent throughout the 300-1000 nm spectral region. Sliding angle was observed to confirm the surfaces’ self-cleaning ability. This work opens up the possibility of mass production of superhydrophobic, transparent, self-cleaning surfaces.
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