Intrinsically reversible superglues via shape adaptation inspired by snail epiphragm

Title
Intrinsically reversible superglues via shape adaptation inspired by snail epiphragm
Authors
조혜성Gaoxiang WuJason Christopher JollyNicole FortoulZhenping HeYuchong GaoAnand JagotaShu Yang
Issue Date
2019-07
Publisher
Proceedings of the National Academy of Sciences of the United States of America
Citation
VOL 116, NO 28-13779
Abstract
Adhesives are ubiquitous in daily life and industrial applications. They usually fall into one of two classes: strong but irreversible (e.g., superglues) or reversible/reusable but weak (e.g., pressuresensitive adhesives and biological and biomimetic surfaces). Achieving both superstrong adhesion and reversibility has been challenging. This task is particularly difficult for hydrogels that, because their major constituent is liquid water, typically do not adhere strongly to any material. Here, we report a snail epiphragm-inspired adhesion mechanism where a polymer gel system demonstrates supergluelike adhesion strength (up to 892 N·cm− 2) that is also reversible. It is applicable to both flat and rough target surfaces. In its hydrated state, the softened gel conformally adapts to the target surface by low-energy deformation, which is locked upon drying as the elastic modulus is raised from hundreds of kilopascals to ∼2.3 GPa, analogous to the action of the epiphragm of snails. We show that in this system adhesion strength is based on the material’s intrinsic, especially near-surface, properties and not on any nearsurface structure, providing reversibility and ease of scaling up for practical applications.
URI
http://pubs.kist.re.kr/handle/201004/70481
ISSN
0027-8424
Appears in Collections:
KIST Publication > Article
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