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High Piezo-Resistive Performances of an Anisotropic Composite Realized by Embedding rGO-based Chitosan Aerogel in Open Cell Polyurethane Foams

Abstract

Anisotropic aerogel-foam composites were developed by embedding reduced graphene oxide (rGO)/chitosan aerogel directly into an open-cell polyurethane foam through an in-situ bidirectional freeze-drying process. The resulting aerogel-foam composites possess both excellent compression-resilience performance and stable piezo-resistive properties due, respectively, to the high mechanical properties of polyurethane foam and to the presence of chitosan-based aerogel loaded with rGO. The latter, indeed, provides outstanding electrical properties due to its conductive and parallel flat lamellar structure. It has been proven that both mechanical and piezo-resistive properties are stable even after 1000 loading/unloading cycles and a reduction of the electrical resistance of about 86% is observed upon the application of a 60% strain. The high sensitivity, long cycling life, and reliable performance over a wide strain range make this unique anisotropic aerogel-foam composite a highly promising candidate for the production of wearable sensors and healthcare monitoring devices.

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Publication details

The article was received on 06 Jan 2019, accepted on 29 Mar 2019 and first published on 03 Apr 2019


Article type: Paper
DOI: 10.1039/C9NR00157C
Citation: Nanoscale, 2019, Accepted Manuscript

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    High Piezo-Resistive Performances of an Anisotropic Composite Realized by Embedding rGO-based Chitosan Aerogel in Open Cell Polyurethane Foams

    T. Zhai, L. Verdolotti, S. Kaciulis, P. Cerruti, G. Gentile, H. Xia, M. Stanzione, G. G. Buonocore and M. Lavorgna, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C9NR00157C

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