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Strain and Pressure Gauges from Tough, Conducting and Edible Hydrogels

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Abstract

The development of highly conductive, robust edible hydrogels was investigated using a combination of the biopolymers gellan gum and gelatin, a common salt (NaCl) and plant-derived cross-linker (genipin). Robust strain gauge/pressure sensors were developed using edible materials to demonstrate the potential of these hydrogels. The hydrogels exhibited gauge factor and pressure sensitivity values of 7.6 ± 0.1 and 400 ± 7 μΩ/Pa for loads up to 3 kPa, respectively. Furthermore, these devices were able to operate under larger loads with gauge factor and pressure sensitivity values of 0.308 ± 0.002 and 7.17 ± 0.05 μΩ/Pa, respectively, for loads between 9 kPa and 280 kPa.

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Authors and Affiliations

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

    Alex Keller, Dominik Benz & 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

    Marc in het Panhuis

Authors
  1. Alex Keller
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  2. Dominik Benz
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  3. Marc in het Panhuis
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Keller, A., Benz, D. & in het Panhuis, M. Strain and Pressure Gauges from Tough, Conducting and Edible Hydrogels. MRS Online Proceedings Library 1795, 27–33 (2015). https://doi.org/10.1557/opl.2015.572

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  • DOI: https://doi.org/10.1557/opl.2015.572

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