Interfacial Adhesion of Fully Transient, Mussel‐Inspired Hydrogels with Different Network Crosslink Modalities
Name
10.1002-admi.202100319.pdf
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1.3 MB
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Unknown
Checksum (MD5)
191efaa1ab6888573f5c4ee83cf8ed39
Author(s)
Darby, Daniel R.
Lai, Erica
Holten‐Andersen, Niels
Pham, Jonathan T.
Date Issued
June 2021
Journal
Advanced Materials Interfaces
Publisher
Wiley
Citation
Darby, Daniel R., Lai, Erica, Holten‐Andersen, Niels and Pham, Jonathan T. 2021. "Interfacial Adhesion of Fully Transient, Mussel‐Inspired Hydrogels with Different Network Crosslink Modalities." Advanced Materials Interfaces, 8 (14).
Version
Author's final manuscript
Abstract
In fully transient, mussel-inspired hydrogels, metal-coordinate complexes form supramolecular crosslinks, which offer tunable viscoelastic properties and mechanical reversibility. The metal-coordination complexation that comprises the crosslinks can take on tris-, bis-, mono-, and free-state modalities (3, 2, 1, or 0 ligands per ion, respectively). Although prior work has established relationships between network crosslinking and mechanical properties, the effect of crosslink and ligand modalities on gel-surface adhesion is not well understood for fully transient hydrogels. Using glass and nickel-coated spherical probes, the effect of network crosslinking modalities on the adhesive strength of hydrogels based on histidine-Ni2+ and nitrodopamine-Fe3+ ion crosslinks is investigated. Since crosslink modalities have a strong impact on the mechanical properties of the bulk network, it is first determined how adhesion relates to the mechanical properties, regardless of the distribution of crosslinking modalities and ligand type. It is ultimately found that the peak adhesive stress increases with decreasing percentage of ligands in tris-crosslinks.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1002/admi.202100319
