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Effect of upper contact line on sliding behavior of water droplet on superhydrophobic surface
  • ISSN号:1001-6538
  • 期刊名称:科学通报(英文版)
  • 时间:0
  • 页码:727-731
  • 语言:中文
  • 分类:TB33[一般工业技术—材料科学与工程]
  • 作者机构:[1]School of Aerospace, Tsinghua Universtiy, Beijing, 100084, China
  • 相关基金:Supported by the National Natural Science Foundation of China (Grant Nos 10672089 and 10872106)
  • 相关项目:多尺度微纳结构的超疏水表面的流动减阻特性研究
中文摘要:

与一个低表面精力,高明显的接触角(】150 °) 和低滑动角度(【5 °) ,超级恐水病的表面最近一直在吸引很多注意。决定滑动角度的真因素仍然保持不清楚。在这篇论文,有支柱的各种各样的超级恐水病的硅表面被影印石版术和 hydrophobized 与 octadecyltrichlorosilane (OTS ) 制作。在滑动角度和 micro-structured 表面与 10 mg 详细被调查之间的关系处于 C-B 州、混合的状态浇微滴。试验性的图画和数据证明滑动角度独立于从 20 ~ 80 μ m 的支柱高度,增加在在滑动角度,并且增加支柱的方面长度的原因减少引起滑动角度的增加的支柱之间的空间。而且,滑动角度与水固体和更低的接触线的界面的接触区域的状态无关。micro-structured 表面上的水微滴的滑动角度被上面的接触线仅仅决定,这被结束。

英文摘要:

With a low surface energy, high apparent contact angle(〉150°) and low sliding angle(〈5°), superhydrophobic surface has recently been attracting a great deal of attention. The true factor determining the sliding angle still remains unclear. In this paper, various superhydrophobic silicon surfaces with pillars are fabricated by photolithography and hydrophobized with octadecyltrichlorosilane (OTS). Relations between sliding angles and micro-structured surfaces are being investigated in detail with 10 mg water droplets in C-B state and mixed state. Experimental pictures and data show that the sliding angle is independent of pillar heights from 20 to 80 μm, increasing the space between pillars causes decrease in sliding angle, and increasing the side lengths of pillars causes increase in sliding angle. Moreover, the sliding angle is irrelevant to the state of interfacial contact area of water-solid and lower contact line. It is concluded that the sliding angle of water droplet on the micro-structured surface is merely determined by the upper contact line.

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