BC/rGO conductive nanocomposite aerogel as a strain sensor

In this work, bacterial cellulose (BC)/reduced graphene oxide (rGO) as a new class of electrical conductive nanocomposite aerogels were in-situ synthesized and dried by the supercritical CO2 (ScCO2) drying method. A modification has been performed on the self-consistent effective medium theory to pr...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2018-02, Vol.137, p.82-96
Main Authors: Hosseini, Hadi, Kokabi, Mehrdad, Mousavi, Seyyed Mohammad
Format: Article
Language:English
Subjects:
Aerogels
Carbon dioxide
Cellulose
Drying
Effective medium theory
Electrical conductivity
Electrical resistivity
Electron tunneling
Mechanical properties
Modulus of elasticity
Motivation
Nanocomposite aerogel
Nanocomposites
Percolation
Percolation threshold
Porosity
Strain sensor
Studies
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, bacterial cellulose (BC)/reduced graphene oxide (rGO) as a new class of electrical conductive nanocomposite aerogels were in-situ synthesized and dried by the supercritical CO2 (ScCO2) drying method. A modification has been performed on the self-consistent effective medium theory to predict overall electrical conductivity of nanocomposite aerogels. It was observed that the porosity had a distinct effect on the overall electrical conductivity of nanocomposite aerogel beneath percolation threshold, but had no effect beyond it. The latter observation was attributed to the formation of continuous pathway associated with electron tunneling effect, beyond percolation threshold. The results also indicated that in the presence of rGO, the density, specific surface area and Young's modulus of nanocomposite aerogel increased up to 0.025 g/cm3, 252 m2/g and 2020 MPa, respectively. Also, the gauge factor of 19 obtained for BC/rGO nanocomposite aerogel indicated the potency of fabricated nanocomposite aerogel as a strain sensor. [Display omitted] •A novel class of conductive BC/rGO nanocomposite aerogel in-situ biosynthesized.•The modified model properly predicts the percolation threshold of BC/rGO aerogels.•A modified model was proposed for prediction of aerogels electrical conductivity.•A gauge factor of 19 for BC/rGO aerogel indicates its potency as a strain sensor.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2017.12.068