Fabrication of Superhydrophobic Metallic Surface by Wire Electrical Discharge Machining for Seamless Roll-to-Roll Printing
- Authors
- So, Jin-Young; Bae, Won-Gyu
- Issue Date
- Apr-2018
- Publisher
- MDPI
- Keywords
- superhydrophobicity; dual-scale roughness; wire electrical discharge machining
- Citation
- METALS, v.8, no.4
- Journal Title
- METALS
- Volume
- 8
- Number
- 4
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/31814
- DOI
- 10.3390/met8040228
- ISSN
- 2075-4701
- Abstract
- 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.
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