Water condensation on superhydrophobic aluminum surfaces with different low-surface-energy coatings

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DOIResolve DOI: http://doi.org/10.1016/j.apsusc.2011.12.100
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TypeArticle
Journal titleApplied Surface Science
ISSN0169-4332
Volume258
Issue8
Pages40634068; # of pages: 6
SubjectSuperhydrophobic; Condensation; Contact angle; Sliding angle; Surface temperature; Relative humidity
AbstractIn this work, we have fabricated superhydrophobic aluminum surfaces by a facile chemical etching method. Surface morphology and composition were studied by using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). To comparatively investigate the effect of environmental factors on superhydrophobic behaviors of surfaces with different low-surface-energy coatings under controllable condensation conditions, contact and sliding angles were measured from −10 °C to 30 °C under relative humidity (RH) of 30, 60 and 90%, respectively. The calculation of the solid–liquid contact area fraction quantitatively explained the increased wettability characterized by descending contact angle and ascending sliding angle under low temperature and high humidity, and indicated a transition of the equilibrium state from Cassie–Baxter to Wenzel on rough surfaces. The wettability restoration test showed that the loss of superhydrophobicity during condensation could be recovered completely after a drying process at room temperature.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedYes
IdentifierS0169433211020162
NPARC number21268665
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Record identifier0589fe57-d356-4287-98fa-fc98ab40400c
Record created2013-11-06
Record modified2016-05-09
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