Fabrication of super-hydrophobic surfaces on aluminum alloy substrates by RF-sputtered polytetrafluoroethylene coatings

被引：6
|
作者：
Wang, Yang [1 ]
Liu, Xiao Wei [1 ]
Zhang, Hai Feng [1 ]
Zhou, Zhi Ping [1 ]
机构：
[1] Harbin Inst Technol, Dept Microelect, Harbin 150001, Heilongjiang, Peoples R China
来源：
AIP ADVANCES | 2014年 / 4卷 / 03期
基金：
美国国家科学基金会;
关键词：
SUPERHYDROPHOBIC SURFACES; FILMS;
D O I：
10.1063/1.4868363
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, we present a method of fabricating super-hydrophobic surface on aluminum alloy substrate. The etching of aluminum surfaces has been performed using Beck's dislocation etchant for different time to create micrometer-sized irregular steps. An optimised etching time of 50 s is found to be essential before polytetrafluoroethylene (PTFE) coating, to obtain a highest water contact angle of 165+/-2 degrees with a lowest contact angle hysteresis as low as 5+/-2 degrees. The presence of patterned microstructure as revealed by scanning electron microscopy (SEM) together with the low surface energy ultrathin RF-sputtered PTFE films renders the aluminum alloy surfaces highly super-hydrophobic. (C) 2014 Author(s).
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页数：5
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