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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709A Simple Method to Create Superhydrophobic...

A Simple Method to Create Superhydrophobic Aluminium Surfaces

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Abstract:

Superhydrophobic surfaces were prepared using a very simple and low-cost method by spray coating. A high static water contact angle of about 154° was obtained by deposition of stearic acid on an aluminium alloy. However, this coating demonstrated a high contact angle hysteresis (~ 30º). On the other hand, superhydrophobic surfaces with a static contact angle of about 162º and 158º, and a low contact angle hysteresis of about 3º and 5º were respectively obtained by incorporating nanoparticles of SiO₂ and CaCO₃ in stearic acid. The excellent resulting hydrophobicity is attributed to the synergistic effects of micro/nanoroughness and low surface energy. A study of the wettability of these surfaces at temperatures ranging from 20 to-10 °C showed that the superhydrophobic surface becomes rather hydrophobic at supercooled temperatures.

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THERMEC 2011

Info:

Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

2874-2879

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.2874

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Cite this paper

Online since:

January 2012

Authors:

R. Jafari, Masoud Farzaneh

Keywords:

Aluminum (Al), SiO₂ Nanoparticle, Spray Coating, Stearic Acid, Superhydrophobicity

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