Fabrication of raspberry-like superhydrophobic hollow silica particles |
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Authors: | Ha Soo Hwang |
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Affiliation: | Korea Packaging Center, Korea Institute of Industrial Technology, Bucheonsi, Gyeonggido 421-742, South Korea |
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Abstract: | Raspberry-like superhydrophobic hollow silica particles were prepared through a sacrificial polymer template method. The Stöber method was adopted to coat silica onto the surface of cationic polymethylmethacrylate(PMMA) particles by electrostatic interaction. The surface of the PMMA-silica composite particles exhibited raspberry-like morphology with high surface roughness. Hollow silica particles were then obtained by calcination to selectively remove the PMMA core. Subsequent modification with nonafluorohexyltriethoxysilane (NFH-silane) conferred superhydrophobicity on the hollow silica particles. The surface property of this particles were investigated by measuring their water contact angle, and the results showed that such perfluorinated raspberry-like hollow particles had unique superhydrophobic. |
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Keywords: | Hollow particles Silica Polymer template Superhydrophobic Water contact angle |
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