TY - GEN
T1 - A strain sensor from a polymer/carbon nanotube nanocomposite
AU - Hu, Ning
AU - Karube, Yoshifumi
AU - Fukunaga, Hisao
N1 - Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - In this work, the piezoresistive behavior of a strain sensor made from a polymer/carbon nanotube nanocomposite has been investigated. To underpin the working principle of the sensor, we propose an improved 3D statistical resistor network model by incorporating the tunneling effect among randomly distributed carbon nanotubes (CNTs) in a polymer matrix.Moreover, the strain sensor has been experimentally fabricated from a polymer nanocomposite with multi-walled carbon nanotube (MWNT) fillers. The piezoresistivity of this nanocomposite strain sensor has been experimentally investigated. The numerical results obtained from the 3D statistical resistor network model combined with the fiber reorientation model agree very well with the experimental measurements. From numerical and experimental results, as compared to the traditional strain gauges, much higher sensitivity can be obtained in this nanocomposite sensor. The tunneling effect is highlighted to be the major working mechanism of the sensor under small strains. By using the proposed successful numerical model, the influences of various parameters on the sensitivity of the new sensor have been numerically investigated in detail. The influence of various experimental parameters on the sensitivity of the sensor has also been studied. Both results have shown that higher resistance of the sensor leads to higher sensitivity of the sensor. Furthermore, the different behaviors of the sensor under tension and compression have been investigated.
AB - In this work, the piezoresistive behavior of a strain sensor made from a polymer/carbon nanotube nanocomposite has been investigated. To underpin the working principle of the sensor, we propose an improved 3D statistical resistor network model by incorporating the tunneling effect among randomly distributed carbon nanotubes (CNTs) in a polymer matrix.Moreover, the strain sensor has been experimentally fabricated from a polymer nanocomposite with multi-walled carbon nanotube (MWNT) fillers. The piezoresistivity of this nanocomposite strain sensor has been experimentally investigated. The numerical results obtained from the 3D statistical resistor network model combined with the fiber reorientation model agree very well with the experimental measurements. From numerical and experimental results, as compared to the traditional strain gauges, much higher sensitivity can be obtained in this nanocomposite sensor. The tunneling effect is highlighted to be the major working mechanism of the sensor under small strains. By using the proposed successful numerical model, the influences of various parameters on the sensitivity of the new sensor have been numerically investigated in detail. The influence of various experimental parameters on the sensitivity of the sensor has also been studied. Both results have shown that higher resistance of the sensor leads to higher sensitivity of the sensor. Furthermore, the different behaviors of the sensor under tension and compression have been investigated.
KW - Carbon nanotubes
KW - Nanocomposites
KW - Strain sensor
KW - Tunneling effect
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U2 - 10.1007/978-90-481-3771-8_8
DO - 10.1007/978-90-481-3771-8_8
M3 - Conference contribution
AN - SCOPUS:84862295291
SN - 9789048137701
T3 - IUTAM Bookseries
SP - 77
EP - 86
BT - IUTAM Symposium on Multi-Functional Material Structures and Systems - Proceedings of the IUTAM Symposium on Multi-Functional Material Structures and Systems
PB - Springer Verlag
T2 - IUTAM Symposium on Multi-Functional Material Structures and Systems
Y2 - 10 December 2008 through 12 December 2008
ER -