Reversible Underwater Dry Adhesion of a Shape Memory Polymer

Jun Kyu Park, Jeffrey D. Eisenhaure, Seok Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Dry adhesives are believed to be inadequate to achieve high adhesion to a wet or submerged surface due to liquid layers intercalated at the contact interface. Here, the reversible dry adhesion of a thermoresponsive shape memory polymer (SMP) performing under water and other liquids such as oil is presented. It is revealed that applying pressure to the SMP in its compliant rubbery state enables to squeeze out the liquid from its contact interface, and that the interface is then maintained by fixing the SMPs shape in its glassy state. During this conformal and hermetic contact condition, the rigidity of the glassy state SMP provides remarkably high (≈18 atm, atmosphere) underwater yet dry adhesion. Lastly, the permanent shape recovery of the SMP allows a surrounding liquid to quickly squeeze in and separate the contact interface, which makes the SMP almost adhesiveless. These findings pave the way for inexpensive reversible dry adhesives working on submerged surfaces.

Original languageEnglish (US)
Article number1801542
JournalAdvanced Materials Interfaces
Volume6
Issue number3
DOIs
StatePublished - Feb 8 2019

Keywords

  • dry adhesive
  • reversible adhesive
  • shape memory polymer
  • underwater adhesive

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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