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Ion-conductive self-healing hydrogels based on an interpenetrating polymer network for a multimodal sensor
Korea Res Inst Chem Technol, Res Ctr Biobased Chem, Ulsan 44429, South Korea..
Korea Res Inst Chem Technol, Res Ctr Biobased Chem, Ulsan 44429, South Korea..
Korea Res Inst Chem Technol, Res Ctr Biobased Chem, Ulsan 44429, South Korea..
Korea Res Inst Chem Technol, Res Ctr Biobased Chem, Ulsan 44429, South Korea..
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2019 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 371, p. 452-460Article in journal (Refereed) Published
Abstract [en]

Conductive self-healing polymer hydrogel and related soft sensor devices are receiving considerable attention from academia to industry because of their impacts on the lifetime and ergonomic design of soft robotics, prosthesis, and health monitoring systems. However, the development of such a material has thus far been limited considering performances and accessibility. Herein, robustness, self-healing, and conductivity for soft electronic skin are realized by an interpenetrating polymer network (IPN) system based on chemical/ionic cross-inked poly(acrylic acid) containing ferric ions, intercalated with physically cross-linked poly(vinyl alcohol). This IPN hydrogel successfully satisfies all three aforementioned capabilities; elongation at break greater than 1400%; recovery to original mechanical properties greater than 80% after 24 h; and 0.14 Sm-1 of ionic conductivity, which is electrically healable. Such ionic conductivity of hydrogels enables multimodal sensing capabilities, i.e., for strain, pressure, and temperature. Particularly, a uniquely designed dual sensor attached to a finger simultaneously detects mechanical folding and pressure changes independently and can undergo large deformation 1000 times repeated and heating up to 90 degrees C.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2019. Vol. 371, p. 452-460
Keywords [en]
Self-healing polymer, Hydrogel, Sensor, Soft electronics
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-252360DOI: 10.1016/j.cej.2019.04.077ISI: 000467042200049Scopus ID: 2-s2.0-85064122365OAI: oai:DiVA.org:kth-252360DiVA, id: diva2:1338735
Note

QC 20190724

Available from: 2019-07-24 Created: 2019-07-24 Last updated: 2019-07-24Bibliographically approved

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Koo, Jun Mo
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Fibre- and Polymer Technology
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