Processing of nanocomposites using supercritical fluid assisted extrusion for stress/strain sensing applications

Poudel, Anup and Karode, Nireeksha and McGorry, Peter and Walsh, Philip and Lyons, John G. and Kennedy, James and Matthews, Siobhán and Coffey, Austin (2019) Processing of nanocomposites using supercritical fluid assisted extrusion for stress/strain sensing applications. Composites Part B: Engineering, 165. pp. 397-405. ISSN 1359-8368

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The problem of dispersion of nano-additives in thermoplastic elastomers using continuous processing techniques still prevails in scientific and engineering applications. To address this, supercritical fluid (SCF) assisted extrusion was utilised to develop elastic, isotropic and electrically superior materials, which contain elastomeric microphases of Poly(styrene-ethylene-butylene-styrene [SEBS] with homogeneously dispersed conductive nano-additives of carbon black [CB]. SEBS-SCF/CB 5 wt% extrudates showed 46% and 14% higher storage modulus compared to their counterparts in transverse and longitudinal direction respectively. Similarly, piezo-resistive properties of SEBS-SCF/CB composites were found to have a superior strain gauge factor with linear decrease in conductivity with increasing strain, compared to nonlinear increase/decrease in piezoresistive behaviour of SEBS/CB composites. Piezo-resistivity of SEBS-SCF/CB 5 wt% nanocomposites were found to be highly sensitive in both bending (3.6% change in resistance per degree for 1.7 cm thick sample) and tensile strain conditions (gauge factor ca. 9) for smart applications.

Item Type: Article
Additional Information: Funding Information: The authors acknowledge Waterford Institute of Technology scholarship 2013 and SFI Infrastructural Grant (2012) for financial support. Special thanks to SCF Processing Ltd., Drogheda, Ireland and Applied Polymer Technology Research Centre, Athlone for their support throughout the work. Publisher Copyright: © 2019 Elsevier Ltd
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2500/2503
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Depositing User: Admin SSL
Date Deposited: 19 Oct 2022 23:11
Last Modified: 25 Jul 2023 05:50

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