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Open AccessArticle

Assembly Mechanism and the Morphological Analysis of the Robust Superhydrophobic Surface

1
Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology, Jinju, Gyeongnam 52851, Korea
2
Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju, Gyeongnam 52828, Korea
3
Department of Convergence engineering, Pusan National University, Busan 46241, Korea
4
Analytical Engineering Group, Samsung Advanced Institute of Technology, Suwon 440-600, Korea
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(8), 472; https://doi.org/10.3390/coatings9080472
Received: 21 June 2019 / Revised: 24 July 2019 / Accepted: 24 July 2019 / Published: 26 July 2019
(This article belongs to the Special Issue Water and Oil Repellent Surfaces)
Robust superhydrophobic surfaces are fabricated on different substrates by a scalable spray coating process. The developed superhydrophobic surface consists of thin layers of surface functionalized silica nanoparticle (SiO2) bound to the substrate by acrylate-polyurethane (PU) binder. The influence of the SiO2/PU ratio on the superhydrophobicity, and the robustness of the developed surface, is systematically analyzed. The optimized SiO2/PU ratio for prepared superhydrophobic surfaces is obtained between 0.9 and 1.2. The mechanism which yields superhydrophobicity to the surface is deduced for the first time with the help of scanning electron microscopy and profilometer. The effect of mechanical abrasion on the surface roughness and superhydrophobicity are analyzed by using profilometer and contact angle measurement, respectively. Finally, it is concluded that the binder plays a key role in controlling the surface roughness and superhydrophobicity through the capillary mechanism. Additionally, the reason for the reduction in performance is also discussed with respect to the morphology variation. View Full-Text
Keywords: robust superhydrophobic surface; surface assembly mechanism; surface disintegration mechanism robust superhydrophobic surface; surface assembly mechanism; surface disintegration mechanism
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MDPI and ACS Style

Kim, D.; Sasidharanpillai, A.; Yun, K.H.; Lee, Y.; Yun, D.-J.; Park, W.I.; Bang, J.; Lee, S. Assembly Mechanism and the Morphological Analysis of the Robust Superhydrophobic Surface. Coatings 2019, 9, 472. https://doi.org/10.3390/coatings9080472

AMA Style

Kim D, Sasidharanpillai A, Yun KH, Lee Y, Yun D-J, Park WI, Bang J, Lee S. Assembly Mechanism and the Morphological Analysis of the Robust Superhydrophobic Surface. Coatings. 2019; 9(8):472. https://doi.org/10.3390/coatings9080472

Chicago/Turabian Style

Kim, Doeun; Sasidharanpillai, Arun; Yun, Ki H.; Lee, Younki; Yun, Dong-Jin; Park, Woon I.; Bang, Jiwon; Lee, Seunghyup. 2019. "Assembly Mechanism and the Morphological Analysis of the Robust Superhydrophobic Surface" Coatings 9, no. 8: 472. https://doi.org/10.3390/coatings9080472

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