Salvinia-like slippery surface with stable and mobile water/air contact line

Xiaomei Li, Jinlong Yang, Kaixuan Lv, Periklis Papadopoulos, Jing Sun, Dehui Wang, Yanhua Zhao, Longquan Chen, Dapeng Wang, Zuankai Wang, Xu Deng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)

Abstract

Superhydrophobic surfaces are widely used in many industrial settings, and mainly consist of rough solid protrusions that entrap air to minimize the liquid/solid area. The stability of the superhydrophobic state favors relatively small spacing between protrusions. However, this in turn increases the lateral adhesion force that retards the mobility of drops. Here we propose a novel approach that optimizes both properties simultaneously. Inspired by the hydrophobic leaves of Salvinia molesta and the slippery Nepenthes pitcher plants, we designed a Salvinia-like slippery surface (SSS) consisting of protrusions with slippery heads. We demonstrate that compared to a control surface, the SSS exhibits increased stability against pressure and impact, and enhanced lateral mobility of water drops as well as reduced hydrodynamic drag. We also systematically investigate the wetting dynamics on the SSS. With its easy fabrication and enhanced performance, we envision that SSS will be useful in a variety of fields in industry.

Original languageEnglish
Article numbernwaa153
JournalNational Science Review
Volume8
Issue number5
DOIs
Publication statusPublished - 1 May 2021
Externally publishedYes

Keywords

  • drag reduction
  • low adhesion
  • Salvinia molesta
  • slippery Cassie state
  • stability

ASJC Scopus subject areas

  • General

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