Stretchable, Adhesion-Tunable Dry Adhesive by Surface Wrinkling

Type
Article

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

KAUST Grant Number
KUK-FI-037-02

Date
2010-02-16

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.

Citation
Jeong HE, Kwak MK, Suh KY (2010) Stretchable, Adhesion-Tunable Dry Adhesive by Surface Wrinkling. Langmuir 26: 2223–2226. Available: http://dx.doi.org/10.1021/la904290g.

Acknowledgements
This work was supported by the King Abdullah University of Science and Technology (KAUST) program (no. KUK-FI-037-02), the Korea Science & Engineering Foundation through the Nano R&D Program (grant 200702605),and the WCU (World Class University) program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (R31-2008-000-10083-0)

Publisher
American Chemical Society (ACS)

Journal
Langmuir

DOI
10.1021/la904290g

PubMed ID
20088533

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