Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

José Cardoso, Antonio Garcia Giron, Jean-Michel Romano, Daniel Huerta-Murillo, R Jagdheesh, Marc Walker, Stefan Dimov, José L. Ocaña

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)
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Abstract

Micro cell structures of different sizes were patterned using a nanosecond near-infrared laser source on Al2024 aluminium alloy plates with 2 mm thickness. The influence of laser parameters on the shape and size of the produced patterns were studied together with the evolution of wettability properties over time for different storage conditions. Samples were found to be superhydrophobic from a single step laser patterning, requiring no further treatment. Exposure to ambient air was shown to be a key factor in the property changes of the samples over time. The produced surface patterns with different laser parameter settings were correlated with the contact angle measurements, revealing a great influence of the amount of recast material on the hydrophobic properties. X-Ray photoelectron spectroscopy was used to study the impact of surface chemistry changes on hydrophobicity, analysis of elemental composition proved that chemisorbed organic molecules present in the ambient air were responsible for the hydrophilic to superhydrophobic transition.
Original languageEnglish
Pages (from-to)39617-39627
Number of pages11
JournalRSC Advances
Volume7
Issue number63
Early online date14 Aug 2017
DOIs
Publication statusE-pub ahead of print - 14 Aug 2017

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