Stretchable, Adhesion-Tunable Dry Adhesive by Surface Wrinkling

Hoon Eui Jeong, Moon Kyu Kwak, Kahp Y. Suh

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114 Scopus citations

Abstract

We introduce a simple yet robust method of fabricating a stretchable, adhesion-tunable dry adhesive by combining replica molding and surface wrinkling. By utilizing a thin, wrinkled polydimethyl siloxane (PDMS) sheet with a thickness of 1 mm with built-in micropillars, active, dynamic control of normal and shear adhesion was achieved. Relatively strong normal (∼10.8 N/cm2) and shear adhesion (∼14.7 N/cm2) forces could be obtained for a fully extended (strained) PDMS sheet (prestrain of∼3%), whereas the forces could be rapidly reduced to nearly zero once the prestrain was released (prestrain of ∼0.5%). Moreover, durability tests demonstrated that the adhesion strength in both the normal and shear directions was maintained over more than 100 cycles of attachment and detachment. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)2223-2226
Number of pages4
JournalLangmuir
Volume26
Issue number4
DOIs
StatePublished - Feb 16 2010
Externally publishedYes

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