Durability of the tunable adhesive superhydrophobic PTFE surfaces for harsh environment applications

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• 作者：Yao Fang ; Jiale Yong ; Feng Chen ; Jinglan Huo ; Qing Yang ; Hao Bian…
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：122
• 期：9
• 全文大小：1,945 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Optical and Electronic Materials
  Nanotechnology
  Characterization and Evaluation Materials
  Surfaces and Interfaces and Thin Films
  Operating Procedures and Materials Treatment
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630
• 卷排序：122

文摘

Tunable adhesive superhydrophobic materials have attracted increasing research interest due to their applications in microdroplet manipulation, biological detection and microfluidic system. However, most of the artificial materials easily lose superhydrophobicity in harsh environments. The durability of superhydrophobic materials is very important to extend their lifetime in practical applications. In this paper, bioinspired durable superhydrophobicity with tunable adhesion on polytetrafluoroethylene surfaces is realized via a one-step femtosecond laser irradiation. On the laser-induced superhydrophobic surfaces, the sliding angle can be tuned from 1° to 90° (water droplet is pinned on the surface at any titled angles). The tunable water adhesion results from different contact states which change from the lotus state to the transition state and then to the composite state with increasing average distance of irradiation points. Water droplet quick localization and no-loss droplet transportation were achieved through designing surface adhesion. In addition, the resultant surfaces are so stable that they can maintain superhydrophobicity even after storing in harsh environments, without dramatical superhydrophobicity decay for a long time.