Superhydrophobic and Anti-icing Coatings on Aluminium Alloy Surfaces
نویسندگان
چکیده
A superhydrophobic and anti-icing surface was prepared by consecutive immersion in boiling water and sputtering of polytetrafluoroethylene on the surface of an aluminium alloy substrate. The immersion time in boiling water plays an important role on the surface morphology and water repellency of the deposited RF-sputtered Teflon coating. The Teflon-like coating deposited on a rough surface achieved with five-minute immersion in boiling water, provided a high static contact angle (~164 o) and low contact angle hysteresis (~4 o). Study of its wettability at low temperature showed that the superhydrophobic surface becomes rather hydrophobic at supercool temperatures. However, these results also showed a delayed freezing time of water droplets on its surface.
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