Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating

Many studies of anisotropic wetting surfaces with directional structures inspired from rice leaves, bamboo leaves, and butterfly wings have been carried out because of their unique liquid shape control and transportation. In this study, a precision mechanical cutting process, ultra-precision machini...

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Veröffentlicht in:Coatings (Basel) 2017-11, Vol.7 (11), p.194
Hauptverfasser: Lee, Kyong-Min, Ngo, Chi-Vinh, Jeong, Ji-Young, Jeon, Eun-chae, Je, Tae-Jin, Chun, Doo-Man
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container_end_page
container_issue 11
container_start_page 194
container_title Coatings (Basel)
container_volume 7
creator Lee, Kyong-Min
Ngo, Chi-Vinh
Jeong, Ji-Young
Jeon, Eun-chae
Je, Tae-Jin
Chun, Doo-Man
description Many studies of anisotropic wetting surfaces with directional structures inspired from rice leaves, bamboo leaves, and butterfly wings have been carried out because of their unique liquid shape control and transportation. In this study, a precision mechanical cutting process, ultra-precision machining using a single crystal diamond tool, was used to fabricate a mold with microscale directional patterns of triangular cross-sectional shape for good moldability, and the patterns were duplicated on a flat thermoplastic polymer plate by compression molding for the mass production of an anisotropic wetting polymer surface. Anisotropic wetting was observed only with microscale patterns, but the sliding of water could not be achieved because of the pinning effect of the micro-structure. Therefore, an additional dip coating process with 1H, 1H, 2H, 2H-perfluorodecythricholosilanes, and TiO2 nanoparticles was applied for a small sliding angle with nanoscale patterns and a low surface energy. The anisotropic superhydrophobic surface was fabricated and the surface morphology and anisotropic wetting behaviors were investigated. The suggested fabrication method can be used to mass produce an anisotropic superhydrophobic polymer surface, demonstrating the feasibility of liquid shape control and transportation.
doi_str_mv 10.3390/coatings7110194
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source Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute; Alma/SFX Local Collection
subjects Anisotropy
Bamboo
Coating effects
Diamond machining
Diamond tools
Hydrophobic surfaces
Hydrophobicity
Immersion coating
Mass production
Moldability
Molding (process)
Plates (structural members)
Polymers
Precision machining
Pressure molding
Shape control
Sliding
Surface energy
Titanium oxides
Transportation
Wetting
title Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating
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