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Fabrication of Superhydrophobic Metallic Surface by Wire Electrical Discharge Machining for Seamless Roll-to-Roll Printing

Department of Electrical Engineering, Soongsil University, Seoul 156-743, Korea
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Metals 2018, 8(4), 228; https://doi.org/10.3390/met8040228
Received: 25 February 2018 / Revised: 28 March 2018 / Accepted: 30 March 2018 / Published: 2 April 2018
This paper presents a proposal of a direct one-step method to fabricate a multi-scale superhydrophobic metallic seamless roll mold. The mold was fabricated using the wire electrical discharge machining (WEDM) technique for a roll-to-roll imprinting application to produce a large superhydrophobic surface. Taking advantage of the exfoliating characteristic of the metallic surface, nano-sized surface roughness was spontaneously formed while manufacturing the micro-sized structure: that is, a dual-scale hierarchical structure was easily produced in a simple one-step fabrication with a large area on the aluminum metal surface. This hierarchical structure showed superhydrophobicity without chemical coating. A roll-type seamless mold for the roll-to-roll process was fabricated through engraving the patterns on the cylindrical substrate, thereby enabling to make a continuous film with superhydrophobicity. View Full-Text
Keywords: superhydrophobicity; dual-scale roughness; wire electrical discharge machining superhydrophobicity; dual-scale roughness; wire electrical discharge machining
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So, J.-Y.; Bae, W.-G. Fabrication of Superhydrophobic Metallic Surface by Wire Electrical Discharge Machining for Seamless Roll-to-Roll Printing. Metals 2018, 8, 228.

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