复合超疏水表面制备及其上液滴运动特性研究

张静娴; 姚朝晖; 郝鹏飞; 傅承诵; 南豆; 韦进全

doi:10.3879/j.issn.1000-0887.2014.03.011

复合超疏水表面制备及其上液滴运动特性研究

doi: 10.3879/j.issn.1000-0887.2014.03.011

¹清华大学航天航空学院, 北京 100084;²清华大学材料学院, 北京 100084

基金项目: 国家自然科学基金（11272176）

详细信息

作者简介:
张静娴（1990—），女，重庆云阳人，硕士生（E-mail: zhang_jing_x@126.com）

中图分类号: O363.2
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出版历程
- 收稿日期: 2013-10-06
- 修回日期: 2013-12-13
- 刊出日期: 2014-03-15

Study of Preparation and Dynamic Hydrophobicity of Superhydrophobic Surfaces With Micro-Nano Textures

¹School of Aerospace, Tsinghua University, Beijing 100084, P.R.China;²School of Materials Science and Engineering, Tsinghua University,Beijing 100084, P.R.China

Funds: The National Natural Science Foundation of China（11272176）

摘要

摘要: 采用光刻法制备出微米尺度的硅微方柱结构，并利用化学气相沉积的方法在其上可控地生长定向碳纳米管，由此制备出具有可控比例微纳二级结构的超疏水表面．通过扫描电子显微镜(SEM)测量和接触角、滚动角测试的方法对具有不同微纳结构比例及尺寸的表面形貌和性能进行探查和测试，对制备过程中参数的选择做出了优化处理．得到了表面性质均匀、稳定的二级结构超疏水表面．通过粒子图像测速(PIV) 的方法测量在结构表面滚动液滴的内部流动形态，并与一级结构表面进行对比．分析并总结了该文中表面的疏水机理及表面微纳结构比例、形态、尺寸等因素对疏水性能的影响.
- 超疏水 /
- 微纳二级结构 /
- PIV(particle image velocimetry) /
- 流动减阻
Abstract: A kind of superhydrophobic surface with controlled two-scale micro-nano textures was prepared. The lithography and ion etching technology were used to fabricate the micro structures on silicon wafers. Then the carbon nanotubes were controlled to grow on the prepared substrate by means of chemical vapor deposition (CVD) technology. The morphology and performance of the different surfaces have been examined by scanning electron microscope (SEM) and contact angle, rolling angle measurement. Particle image velocimetry (PIV) technology was used to capture the internal velocity distribution of water droplets rolling on the superhydrophobic surfaces with two-scale micro-nano textures. Compared with the one-scale micro-structured surface, the two-scale micro-nano-textured surfaces were found with lower rolling angle and higher rolling velocity for the droplets on them. A much higher slip velocity was found near the wall in the two-scale case, too, which may lead to significant drag reduction in the future research.
- superhydrophobic /
- micro-nano textures /
- PIV(particle image velocimetry) /
- drag reduction

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参考文献(9)

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