Crosslinking of fibrous hydrogels

Daniël C. Schoenmakers, Alan E. Rowan () and Paul H. J. Kouwer ()
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Daniël C. Schoenmakers: Radboud University
Alan E. Rowan: Radboud University
Paul H. J. Kouwer: Radboud University

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract In contrast to most synthetic hydrogels, biological gels are made of fibrous networks. This architecture gives rise to unique properties, like low concentration, high porosity gels with a high mechanical responsiveness as a result of strain-stiffening. Here, we used a synthetic polymer model system, based on polyisocyanides, that we crosslinked selectively inside the bundles. This approach allows us to lock in the fibrous network present at the crosslinking conditions. At minimum crosslink densities, we are able to freeze in the architecture, as well as the associated mechanical properties. Rheology and X-ray scattering experiments show that we able to accurately tailor network mechanics, not by changing the gel composition or architecture, but rather by tuning its (thermal) history. Selective crosslinking is a crucial step in making biomimetic networks with a controlled architecture.

Date: 2018
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DOI: 10.1038/s41467-018-04508-x

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