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Trifunctional Microgel-Mediated Preparation and Toughening of Printable High-Performance Chitosan Hydrogels for Underwater Communications by Baokang Wang; Jupen Liu; Ping Zhang; Hongqiu Wei; You Yu is a Engineering article available to read on EtoBox.

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Natural and biocompatible chitosan has demonstrated wide applications. However, rapidly fabricating highperformance chitosan hydrogels in one-step controllable processes is still a challenge for some advanced applications. Here, we report a trifunctional microgel-mediated photochemical (TMMP) strategy to achieve the fabrication of printable tough chitosan-based hydrogels (PTCHs) in seconds. Such microgels help the slow release of persulfate anions and their uniform dispersion in an aqueous solution of cationic chitosan. The released persulfates are available for preparing multiple networks of phenolic coupling of modified chitosan and radical polymerization of Pluronic F127 via orthogonal tris(bipyridine)ruthenium(II)-based photochemistry, respectively. Trifunctional microgels have reversible Ca 2+ -crosslinked networks that further improve the hydrogels' mechanical properties and toughness. The maximum stress and toughness increase by >20 folds compared to the chitosan and F127 hydrogels with single network structures. Moreover, these microgels enable the precursor to have a good shearing-thinning property and benefit the controllable preparation of PTCHs in a short time, as low a

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Author

Baokang Wang; Jupen Liu; Ping Zhang; Hongqiu Wei; You Yu

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Engineering (Physical Sciences)