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

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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 affected the microstructure of the cryogels. These doubly dynamic 3D-printed cryogels are macroporous, exhibit outstanding swelling performances, and can fully, rapidly and autonomously self-heal.

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

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Publication details

The article was received on 20 Nov 2017, accepted on 20 Dec 2017 and first published on 20 Dec 2017


Article type: Paper
DOI: 10.1039/C7PY01945A
Citation: Polym. Chem., 2018, Advance Article
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    3D-printing of dynamic self-healing cryogels with tuneable properties

    M. Nadgorny, J. Collins, Z. Xiao, P. J. Scales and L. A. Connal, Polym. Chem., 2018, Advance Article , DOI: 10.1039/C7PY01945A

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