Accurate self-damage detection by electrically conductive epoxy/graphene nanocomposite film

Meng Q. Araby S. Oh J.-A. Chand A. Zhang X. Kenelak V. Ma J. Liu T. Ma J.
20 May 2021 John Wiley and Sons Inc

Journal of Applied Polymer Science
2021 #138 Issue 20

Detecting and locating accurately structure damages at an early stage is essential to minimization of catastrophic disasters, prevention of fatalities and provision of cost-effective maintenance. We herein report a facile approach to detect structure damages and to accurately identify their locations by using an electrically conductive epoxy/graphene nanocomposite film. A percolation threshold of electrical conductivity was observed at 0.58 vol% of graphene platelets (GnPs, ~3 nm in thickness and ~15 μm in length); electrical conductivity of 3.3 S/cm was obtained at 9.00 vol% of GnPs. The epoxy/GnP composite film containing 9.00 vol% of GnPs was employed as an array of electrically conductive paths in horizontal and vertical directions to detect and locate structures damages. Thermal stability and temperature coefficient of the composite film were studied. Relative resistance change due to temperature effect was fitted into an exponential function, which showed strong correlation with the temperature change. This implies that an algorithm can be developed to compensate drift errors in resistance measurement due to temperature variation. With the help of Internet of Things, our self-sensing epoxy/graphene nanocomposite films have great potential for smart aerospace structural health monitoring.

adhesives , mechanical properties , percolation threshold , sensors and actuators , theory and modeling

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College of Aerospace Engineering, Shenyang Aerospace University, Shenyang, China
School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, Kazakhstan
Department of Mechanical Engineering, Benha Faculty of Engineering, Benha University, Benha, Egypt
University of South Australia, UniSA STEM and Future Industries Institute, Mawson Lakes, SA, Australia
Administrative Department, Shenyang Aerospace University, Shenyang, China
NICM Health Research Institute, Western Sydney University, Sydney, NSW, Australia

College of Aerospace Engineering
School of Engineering and Digital Sciences
Department of Mechanical Engineering
University of South Australia
Administrative Department
NICM Health Research Institute

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