Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 15, Pages 6489-6493Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2011.02.049
Keywords
Superhydrophobicity; Anodising; Supercooled temperature; Silicone rubber; Voltage
Categories
Funding
- Hydro-Quebec
- Hydro One
- Reseau Transport d'Electricite (RTE)
- Electricite de France (EDF)
- Alcan Cable
- K-Line Insulators
- Tyco Electronics
- Dual-ADE
- FUQAC
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A nanostructutered superhydrophobic surface was elaborated by applying an RTV silicone rubber coating on electrochemically processed aluminium substrates. Study of anodisation voltage on surface morphology showed that higher anodising voltage led to larger pore sizes. Scanning electron microscopy image analysis showed bird's nest and beehive structures formed on anodised surfaces at 50 V and 80 V. Water static contact angle on the treated surfaces reached up to 160 degrees at room temperature. Study of superhydrophobic surfaces at super cooled temperature showed important delayed freezing time for RTV hydrophobic surfaces when compared to non-treated aluminium. However, lower wettability was observed when surface temperature went down from 20 degrees C to -10 degrees C. Also, it was found that the capacitance of superhydrophobic surfaces decreased with increasing anodising voltage. (C) 2011 Elsevier B. V. All rights reserved.
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