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3D Printed Edible Hydrogel Electrodes

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Abstract

We report on a hand-held reactive printing device used to pattern highly conductive, edible hydrogel wires formed from gellan gum, gelatin, cross-linkers and a common salt (NaCl). The conductivity of the gels when printed (190 ± 20 mS/cm) closely matched the conductivity recorded for cast systems (200 ± 19 mS/cm). Printing was observed to reduce the elastic modulus and failure strains of hydrogels under compression, but printed gels retained sufficient integrity for application as flexible conductive lines. We demonstrate that hand-held printing can utilize to pattern soft conductor elements within a simple electronic circuit.

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Authors and Affiliations

  1. Soft Materials Group, School of Chemistry, University of Wollongong, Wollongong, NSW, 2522, Australia

    Alex Keller & Marc in het Panhuis

  2. Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, University of Wollongong, Wollongong, NSW, 2522, Australia

    Leo Stevens, Gordon G. Wallace & Marc in het Panhuis

Authors
  1. Alex Keller
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  2. Leo Stevens
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  3. Gordon G. Wallace
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  4. Marc in het Panhuis
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Keller, A., Stevens, L., Wallace, G.G. et al. 3D Printed Edible Hydrogel Electrodes. MRS Advances 1, 527–532 (2016). https://doi.org/10.1557/adv.2015.10

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