Journal
EXTREME MECHANICS LETTERS
Volume 40, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.eml.2020.100891
Keywords
Topological adhesion; Chitosan; pH; Stretchable interface; Adhesion energy
Funding
- NSF MRSEC, USA [DMR-14-20570]
- National Science Foundation, USA Graduate Research Fellowship [DGE1745303]
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When two stretchable materials (e.g., hydrogels, elastomers, and biological tissues) are adhered, the interface should be stretchable, without constraining the deformation and degrading adhesion. Here we develop methods to characterize stretchable adhesion. We do so by topological adhesion, using polyacrylamide hydrogels as adherends, chitosan as stitch polymers, and a change in the pH as a trigger. We prestretch the topohered hydrogels in several ways, and measure adhesion energy when the hydrogels are either in the un-stretched or the stretched state. Stretchable adhesion is achieved when the adhesion energy can maintain a similar level, insensitive to the prestretch. We study the mechanism of stretchable adhesion formed by the chitosan topohesive. (C) 2020 Elsevier Ltd. All rights reserved.
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