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

被引：104

作者：

Cardoso, J. T. ^{[1
]}

Garcia-Giron, A. ^{[2
]}

Romano, J. M. ^{[2
]}

Huerta-Murillo, D. ^{[1
]}

Jagdheesh, R. ^{[1
]}

Walker, M. ^{[3
]}

Dimov, S. S. ^{[2
]}

Ocana, J. L. ^{[1
]}

机构：

[1] Univ Politecn Madrid, UPM Laser Ctr, Ctra Valencia,Km 7-3, Madrid 28031, Spain

[2] Univ Birmingham, Sch Mech Engn, Birmingham B15 2TT, W Midlands, England

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

RSC ADVANCES | 2017年 / 7卷 / 63期

基金：

欧盟地平线“2020”;

关键词：

SUPERHYDROPHOBIC SURFACES; METALLIC SURFACES; CHEMISTRY; OXIDE; TRANSITION; CASSIE; WATER;

D O I：

10.1039/c7ra07421b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：39617 / 39627

页数：11

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