Magnetorheological Elastomer Films with Tunable Wetting and Adhesion Properties

Sanghee Lee, Changyong Yim, Wuseok Kim, Sangmin Jeon

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

We fabricated magnetorheological elastomer (MRE) films consisting of polydimethylsiloxane and various concentrations of fluorinated carbonyl iron particles. The application of a magnetic field to the MRE film induced changes in the surface morphology due to the alignment of the iron particles along the magnetic field lines. At low concentrations of iron particles and low magnetic field intensities, needle-like microstructures predominated. These structures formed more mountain-like microstructures as the concentration of iron particles or the magnetic field intensity increased. The surface roughness increased the water contact angle from 100° to 160°and decreased the sliding angle from 180°to 10°. The wettability and adhesion properties changed substantially within a few seconds simply upon application of a magnetic field. Cyclical measurements revealed that the transition was completely reversible.

Original languageEnglish
Pages (from-to)19853-19856
Number of pages4
JournalACS applied materials & interfaces
Volume7
Issue number35
DOIs
StatePublished - 9 Sep 2015

Keywords

  • adhesion
  • contact angle
  • magnetic field
  • magnetorheological elastomer
  • superhydrophobic surfaces

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