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Formation conditions and mechanism of wetting state on micro-/nanostructured superhydrophobic surface

  • Haikun Zheng
  • , Shinan Chang*
  • , Guojia Ma
  • , Shuoshuo Wang
  • *Corresponding author for this work
  • Beihang University
  • China Aviation Industry Corporation

Research output: Contribution to journalArticlepeer-review

Abstract

Due to its unique wetting properties, the superhydrophobic surface caused by the micro-/nanostructure has shown good application prospects in many fields. Therefore, the relationship between the wetting state and the surface structure should have a deeper understanding. The thermodynamic method, based on the principle of minimum energy, is used to analyze all the nine wetting states of droplet on a micro-/nanostructured superhydrophobic surface, and the existence conditions and corresponding contact angle expressions of each wetting state are derived. On this basis, taking lotus-simulating surfaces as an example, the validity and sufficiency of the two-level micro-/nanostructure on superhydrophobicity is quantitatively clarified. The correlation between the wetting states as well as the transformation process of its structure is further analyzed. The results in this paper provide a reference for designing stable micro-/nanostructured superhydrophobic surface.

Original languageEnglish
Pages (from-to)311-322
Number of pages12
JournalInterfacial Phenomena and Heat Transfer
Volume7
Issue number4
DOIs
StatePublished - 2019

Keywords

  • Micro-/nanostructure
  • Superhydrophobic surface
  • Thermodynamics
  • Wetting state

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