Journal
ACS APPLIED POLYMER MATERIALS
Volume 1, Issue 11, Pages 2883-2889Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.9b00590
Keywords
hydrogel; mussel-inspired; high performance; underwater adhesion; noncovalent cross-link
Funding
- National Natural Science Foundation of China [51573088, 21374029, 21776076]
- Projects of Shanghai Municipality [18JC1410802]
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In this study, high performance hydrogels with strong underwater adhesion were constructed through a mussel feet-rock inspired strategy, in which a random copolymer containing side-chain positive charges and catechol groups (PMD) simulated the adhesive proteins of mussel, and poly(acrylic acid) (PAA) mimicked the rocky surface. PMD and PAA chains could noncovalently cross-link together through hydrogen bonding, charge interaction, and chain entanglement. Catechol groups further provide the hydrogel strong adhesion ability. Taking advantage of this strategy, the obtained PAA/PMD hydrogels featured the best stretchability among reported hydrogels and intensive repeatable adhesion behavior, and further exhibited unusual wet-enhanced tensile and shear strength together with durable underwater adhesion. These findings are valuable for the development of mussel-inspired adhesives and high performance hydrogels.
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