A novel and inexpensive technique for creating superhydrophobic surfaces using Teflon and sandpaper
A novel and inexpensive technique for creating superhydrophobic surfaces using Teflon and sandpaper
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DOI：
10.1088/0022-3727/43/4/045301
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发表时间：
2010-02-03
影响因子：
3.4
通讯作者：
Rothstein, Jonathan P.
中科院分区：
文献类型：
--
作者：
Nilsson, Michael A.;Daniello, Robert J.;Rothstein, Jonathan P.
在过去的十年中，已经花费了相当大的努力来开发与水表现出非常大的接触角的疏水表面。这些方法中的许多需要复杂且昂贵的制造技术。我们证明，砂磨聚四氟乙烯可以产生超疏水表面的前进接触角高达151度和接触角滞后小于4度此外，我们表明，一个广泛的前进接触角和接触角滞后可以通过改变砂纸的粒度，允许未来的滞后和接触角的研究。粗糙化表面的扫描电子显微镜图像描绘了由砂纸赋予表面的长度尺度的范围和幅度，这导致对表面上的润湿状态的更深入的理解。
Considerable efforts have been spent over the last decade developing hydrophobic surfaces exhibiting very large contact angles with water. Many of these methods require complex and expensive fabrication techniques. We demonstrate that sanding Teflon can produce superhydrophobic surfaces with advancing contact angles of up to 151 degrees and contact angle hysteresis of less than 4 degrees Furthermore, we show that a wide range of both advancing contact angles and contact angle hysteresis can be achieved by varying the grit size of the sandpaper, allowing for future hysteresis and contact angle studies. Scanning electron microscopy images of the roughened surfaces depict the range and amplitude of length scales imparted on the surface by the sandpaper, which leads to deeper understanding of the state of wetting on the surface.