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- Title
Superhydrophobic Surface by Replication of Laser Micromachined Pattern in Epoxy/Alumina Nanoparticle Composite.
- Authors
Psarski, Maciej; Marczak, Jacek; Grobelny, Jaros Baw; Celichowski, Grzegorz
- Abstract
Superhydrophobic surfaces were obtained by superposition of microstructure—defined by replication of laser micromachined masters, with nanostructure—created by durable epoxy/γ-Al2O3 nanoparticle composite, used for replication. Hierarchical surface topography thus obtained consisted of hexagonally spaced microcavities and nanoparticle agglomerates, exposed on the replica surface by radio frequency (RF) air plasma etching. Surface topography was further enhanced by rims around the microcavity edges, resulting from nanosecond laser micromachining defects in aluminum masters. Subsequent wet chemical hydrophobization with 1H,1H,2H,2H-perfluorotetradecyltriethoxysilane (PFTDTES) provided superhydrophobic behavior in replicas with a microcavity spacing of 30 μm, as indicated by a water contact angle of 160° and a sliding angle of 8°.The preparationmethod is relatively simple, inexpensive, and potentially scalable.
- Subjects
HYDROPHOBIC surfaces; MICROELECTROMECHANICAL systems; EPOXY compounds; ALUMINUM oxide; METAL nanoparticles; COMPOSITE materials; LASER beams
- Publication
Journal of Nanomaterials, 2014, p1
- ISSN
1687-4110
- Publication type
Article
- DOI
10.1155/2014/547895