Journal article

3D-printing of dynamic self-healing cryogels with tuneable properties

Milena Nadgorny, Joe Collins, Zeyun Xiao, Peter J Scales, Luke A Connal

POLYMER CHEMISTRY | ROYAL SOC CHEMISTRY | Published : 2018

Abstract

We report a novel synthetic and processing methodology for the preparation of doubly dynamic, self-healing, 3D-printable macroporous gels. 3D-printable oxime hydrogels were prepared by cross-linking poly(n-hydroxyethyl acrylamide-co-methyl vinyl ketone) (PHEAA-co-PMVK) with a bifunctional hydroxylamine. 3D-printed oxime hydrogels were subjected to post-printing treatment by thermally induced phase separation (TIPS), which facilitated the formation of hydrogen bonding and oxime cross-links, and dramatically increased the mechanical strength of soft oxime objects in a well-controlled manner by up to ∼1900%. The mechanical properties of the cryogels were tuned by freezing conditions, which affe..

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Grants

Funding Acknowledgements

This work has been supported by the Victorian Endowment for Science Knowledge and Innovation (LAC).