Fabrication of super-hydrophobic surfaces on aluminum alloy substrates by RF-sputtered polytetrafluoroethylene coatings
| Autor: | Yang Wang, Xiao Wei Liu, Hai Feng Zhang, Zhi Ping Zhou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | AIP Advances, Vol 4, Iss 3, Pp 031323-031323-5 (2014) |
| Druh dokumentu: | article |
| ISSN: | 2158-3226 43029167 |
| DOI: | 10.1063/1.4868363 |
| Popis: | In this work, we present a method of fabricating super-hydrophobic surface on aluminum alloy substrate. The etching of aluminum surfaces has been performed using Beck's dislocation etchant for different time to create micrometer-sized irregular steps. An optimised etching time of 50 s is found to be essential before polytetrafluoroethylene (PTFE) coating, to obtain a highest water contact angle of 165±2° with a lowest contact angle hysteresis as low as 5±2°. The presence of patterned microstructure as revealed by scanning electron microscopy (SEM) together with the low surface energy ultrathin RF-sputtered PTFE films renders the aluminum alloy surfaces highly super-hydrophobic. |
| Databáze: | Directory of Open Access Journals |
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