Fabrication of Superhydrophobic Surfaces with Hierarchical Structure through a Solution-Immersion Process on Copper and Galvanized Iron Substrates

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• 作者：Wenguo Xu ; Hongqin Liu ; Shixiang Lu ; Jinming Xi ; Yanbin Wang
• 刊名：Langmuir
• 出版年：2008
• 出版时间：October 7, 2008
• 年：2008
• 卷：24
• 期：19
• 页码：10895-10900
• 全文大小：320K
• 年卷期：v.24,no.19(October 7, 2008)
• ISSN：1520-5827

文摘

Superhydrophobic surfaces were obtained on copper and galvanized iron substrates by means of a simple solution-immersion process: immersing the clean metal substrates into a methanol solution of hydrolyzed 1H,1H,2H,2H-perfluorooctyltrichlorosilane (CF₃(CF₂)₅(CH₂)₂SiCl₃, FOTMS) for 3−4 days at room temperature and then heated at 130 °C in air for 1 h. Both of the resulting surfaces have a high water contact angle (CA) of larger than 150.0° as well as a small sliding angle (SA) of less than 5°. The formation and structure of the superhydrophobic surfaces were characterized by means of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray spectrometry (EDX). SEM images showed that both of the resulting surfaces exhibited special hierarchical structure. The special hierarchical structure along with the low surface energy leads to the high surface superhydrophobicity.