A “self‐pinning” adhesive based on responsive surface wrinkles |
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| Authors: | Edwin P. Chan Jeffrey M. Karp Robert S. Langer |
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| Affiliation: | 1. Harvard‐MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139;2. Center for Regenerative Therapeutics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02319;3. Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts 02138;4. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 |
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| Abstract: | ![]()
Surface wrinkles are interesting since they form spontaneously into well‐defined patterns. The mechanism of formation is well‐studied and is associated with the development of a critical compressive stress that induces the elastic instability. In this work, we demonstrate surface wrinkles that dynamically change in response to a stimulus can improve interfacial adhesion with a hydrogel surface through the dynamic evolution of the wrinkle morphology. We observe that this control is related to the local pinning of the crack separation pathway facilitated by the surface wrinkles during debonding, which is dependent on the contact time with the hydrogel. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2010 |
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| Keywords: | adhesion adhesives biomaterials hydrogels stimuli‐sensitive polymers surfaces swelling |
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