Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 17, Issue 8, Pages 5515-5519Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2017.13805
Keywords
Superhydrophobic; Self-Assembled Monolayer; Spray Coating; Non-Wetting; Nanoparticle
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Funding
- Kyonggi University
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Inspired by nature, creating an artificial superhydrophobic surface would have broad implication in many industries. Although various fabrication approaches have been developed, low-cost pathways for integration into large-area superhydrophobic coating remain a considerable challenge. Herein, we developed a fast, facile, and scalable approach for the fabrication of superhydrophobic surfaces via one-step spray coating process. The nanoparticle solution for the film coating was prepared by functionalizing the hydrophilic surface of Al2O3 nanoparticles by self-assembly of phosphonic acid based hydrocarbon molecule. After well dispersion in solution, the functionalized Al2O3 nanoparticles were simply spray-coated for fabricating the superhydrophobic hierarchical structures without post-hydrophobization. The surface morphologies and wetting properties of the developed coating were characterized to optimize the superhydrophobicity. Consequently, our optimized one-step coating method allows excellent non-wetting superhydrophobic surface with morphology controlled and densely packed hierarchical structures, exhibiting a high water contact angle (>160 degrees) with a low sliding angle (<2 degrees). Furthermore, this method was applied to diverse substrates including silicon, glass, fabric, and even flexible plastic substrates.
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