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Issue 40, 2018
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Polymers with autonomous self-healing ability and remarkable reprocessability under ambient humidity conditions

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Abstract

The use of moisture in self-healing polymeric materials is a very attractive option given the practical environments in which the materials are used. Herein, we incorporated tetrahedral boronate-esters bearing B–N dative bonds as dynamic crosslinks into polymers, which led to moisture-induced self-healing abilities in their bulk states. Owing to the higher rate of ester formation over tetrahedral boronate-ester hydrolysis under wet conditions, these polymers invariably maintain a sufficient number of dynamic crosslinks to facilitate a combination of autonomous healing behavior and mechanical strength, which makes them unique compared to other previously developed water-triggered self-healing polymers. The self-healed materials maintain good mechanical properties, with fracture stresses of ∼2 MPa, and ageing of the cut surfaces does not affect their healing efficiency. Furthermore, the tetrahedral boronate-ester bonds exhibit dual stimuli-responsive dynamic behavior triggered by either moisture or heat, resulting in network polymers with remarkable reprocessabilities.

Graphical abstract: Polymers with autonomous self-healing ability and remarkable reprocessability under ambient humidity conditions

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Publication details

The article was received on 22 May 2018, accepted on 12 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA04769C
Citation: J. Mater. Chem. A, 2018,6, 19643-19652
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    Polymers with autonomous self-healing ability and remarkable reprocessability under ambient humidity conditions

    C. Kim, H. Ejima and N. Yoshie, J. Mater. Chem. A, 2018, 6, 19643
    DOI: 10.1039/C8TA04769C

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