Elucidation of structure-to-property relationships of piezoresistive polymer-carbon nanotube nanocomposites

被引:6
作者
Fang, Weiqing [1 ]
Leung, Siu N. [1 ]
机构
[1] York Univ, Lassonde Sch Engn, Dept Mech Engn, Toronto, ON M3J 1P3, Canada
关键词
STRAIN SENSOR; COMPOSITES; FILMS;
D O I
10.1063/1.4927628
中图分类号
O59 [应用物理学];
学科分类号
摘要
Polymeric nanocomposites (PNC) filled with carbon nanotubes (CNTs) possess superior multifunctionality, including electrical, thermal, and mechanical properties, making them an emerging family of advanced and multifunctional materials. In recent years, flexible polymer/CNT nanocomposites are increasingly being considered as promising alternatives to conventional smart materials. Their piezoresistive behaviours have led to many potential applications in strain sensing. Despite extensive experimental and theoretical research, the underlying mechanisms for polymer/CNT nanocomposites' piezoresistive behaviours have yet been elucidated. This paper reports comprehensive investigations on the mechanisms and the structure-to-property relationships of these piezoresistive nanocomposites. Quantitative analyses revealed that piezoresistivity of polymer/CNT nanocomposites is predominantly governed by the three mechanisms related to the strain-induced morphological evolution of the CNT network embedded in the polymer matrix. Furthermore, both CNT content and CNT alignment are key structural parameters that affect the contribution of different mechanisms on PNCs' piezoresistivity and the sensitivity of flexible PNCs as strain sensors. For PNC filled with high content of randomly dispersed CNTs, the piezoresistivity was predominantly caused by the breakage of a complex conductive network into two or more simpler conductive paths. For PNC filled with low content of highly aligned CNTs, the piezoresistivity was mainly contributed by the complete disruption of originally interconnected CNTs in electrically conductive pathways. (C) 2015 AIP Publishing LLC.
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页数:9
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共 32 条
  • [1] Piezoresistive Strain Sensors Made from Carbon Nanotubes Based Polymer Nanocomposites
    Alamusi
    Hu, Ning
    Fukunaga, Hisao
    Atobe, Satoshi
    Liu, Yaolu
    Li, Jinhua
    [J]. SENSORS, 2011, 11 (11) : 10691 - 10723
  • [2] Modeling electrical conductivities of nanocomposites with aligned carbon nanotubes
    Bao, W. S.
    Meguid, S. A.
    Zhu, Z. H.
    Meguid, M. J.
    [J]. NANOTECHNOLOGY, 2011, 22 (48)
  • [3] Super-tough carbon-nanotube fibres -: These extraordinary composite fibres can be woven into electronic textiles.
    Dalton, AB
    Collins, S
    Muñoz, E
    Razal, JM
    Ebron, VH
    Ferraris, JP
    Coleman, JN
    Kim, BG
    Baughman, RH
    [J]. NATURE, 2003, 423 (6941) : 703 - 703
  • [4] Nanotube film based on single-wall carbon nanotubes for strain sensing
    Dharap, P
    Li, ZL
    Nagarajaiah, S
    Barrera, EV
    [J]. NANOTECHNOLOGY, 2004, 15 (03) : 379 - 382
  • [5] Effect of nanotube alignment on percolation conductivity in carbon nanotube/polymer composites
    Du, FM
    Fischer, JE
    Winey, KI
    [J]. PHYSICAL REVIEW B, 2005, 72 (12)
  • [6] Electrical conductivity of individual carbon nanotubes
    Ebbesen, TW
    Lezec, HJ
    Hiura, H
    Bennett, JW
    Ghaemi, HF
    Thio, T
    [J]. NATURE, 1996, 382 (6586) : 54 - 56
  • [7] Fang W., COMPOS B UNPUB
  • [8] Piezoresistive Performance of Long-Fiber Composites with Carbon Nanotube Doped Matrix
    Fernberg, Patrik
    Nilsson, Greger
    Joffe, Roberts
    [J]. JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, 2009, 20 (09) : 1017 - 1023
  • [9] Magnetic properties of carbon nanotube poly(ether-ester) nanocomposites
    Glenis, S.
    Likodimos, V.
    Guskos, N.
    Yarmis, D.
    Zolnierkiewicz, G.
    Szymczyk, A.
    Lin, C. L.
    [J]. JOURNAL OF APPLIED PHYSICS, 2010, 108 (05)
  • [10] Thermal characterization of single-wall carbon nanotube bundles using the self-heating 3ω technique
    Hou, Jinbo
    Wang, Xinwei
    Vellelacheruvu, Pallavi
    Guo, Jiaqi
    Liu, Chang
    Cheng, Hui-Ming
    [J]. JOURNAL OF APPLIED PHYSICS, 2006, 100 (12)