Skin-like mechanoresponsive self-healing ionic elastomer from supramolecular zwitterionic network

Wei Zhang, Baohu Wu, Shengtong Sun () and Peiyi Wu ()
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Wei Zhang: Donghua University
Baohu Wu: Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ) Forschungszentrum Jülich
Shengtong Sun: Donghua University
Peiyi Wu: Donghua University

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: Abstract Stretchable ionic skins are intriguing in mimicking the versatile sensations of natural skins. However, for their applications in advanced electronics, good elastic recovery, self-healing, and more importantly, skin-like nonlinear mechanoresponse (strain-stiffening) are essential but can be rarely met in one material. Here we demonstrate a robust proton-conductive ionic skin design via introducing an entropy-driven supramolecular zwitterionic reorganizable network to the hydrogen-bonded polycarboxylic acid network. The design allows two dynamic networks with distinct interacting strength to sequentially debond with stretch, and the conflict among elasticity, self-healing, and strain-stiffening can be thus defeated. The representative polyacrylic acid/betaine elastomer exhibits high stretchability (1600% elongation), immense strain-stiffening (24-fold modulus enhancement), ~100% self-healing, excellent elasticity (97.9 ± 1.1% recovery ratio,

Date: 2021
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DOI: 10.1038/s41467-021-24382-4

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