Crack-Free, Soft Wrinkles Enable Switchable Anisotropic Wetting

Dongjoon Rhee, Won Kyu Lee, Teri W. Odom

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Soft skin layers on elastomeric substrates are demonstrated to support mechano-responsive wrinkle patterns that do not exhibit cracking under applied strain. Soft fluoropolymer skin layers on pre-strained poly(dimethylsiloxane) slabs achieved crack-free surface wrinkling at high strain regimes not possible by using conventional stiff skin layers. A side-by-side comparison between the soft and hard skin layers after multiple cycles of stretching and releasing revealed that the soft skin layer enabled dynamic control over wrinkle topography without cracks or delamination. We systematically characterized the evolution of wrinkle wavelength, amplitude, and orientation as a function of tensile strain to resolve the crack-free structural transformation. We demonstrated that wrinkled surfaces can guide water spreading along wrinkle orientation, and hence switchable, anisotropic wetting was realized.

Original languageEnglish
Pages (from-to)6523-6527
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number23
DOIs
Publication statusPublished - Jan 1 2017

Keywords

  • mechano-responsive patterns
  • plasma chemistry
  • polymers
  • soft matter
  • switchable wetting

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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