Percolation mechanism and effective conductivity of mechanically deformed 3-dimensional composite networks: Computational modeling and experimental verification

被引:60
作者
Chang, Eunse [1 ]
Ameli, Amir [1 ,2 ]
Alian, Ahmed R. [3 ]
Mark, Lun Howe [1 ]
Yu, Kejing [1 ,4 ]
Wang, Sai [1 ]
Park, Chul B. [1 ]
机构
[1] Univ Toronto, Dept Mech & Ind Engn, Microcellular Plast Mfg Lab, Toronto, ON M5S 3G8, Canada
[2] Univ Massachusetts Lowell, Dept Plast Engn, Lowell, MA 01854 USA
[3] Cairo Univ, Fac Engn, Dept Mech Design & Prod, Giza, Egypt
[4] Jiangnan Univ, Key Lab Ecotext, Minist Educ, Wuxi 214122, Jiangsu, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
Polymer-matrix composites; Electrical properties; Directional orientation; Computational modeling; Percolation threshold; INTERFERENCE SHIELDING EFFECTIVENESS; CARBON NANOTUBE NETWORK; ELECTRICAL-CONDUCTIVITY; POLYMER COMPOSITES; PIEZORESISTIVITY; ANISOTROPY; MATRIX;
D O I
10.1016/j.compositesb.2020.108552
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, the structural evolution of conductive polymer composites (CPCs) in response to mechanical deformation (uniaxial and biaxial compressive and tensile strains) is theoretically modeled and experimentally verified. The structural responses in mechanically deformed CPCs were simulated by incorporating the corresponding topological changes in representative volume element (RVE) and embedded filler networks. The percolating filler networks were then modeled as an equivalent electrical circuit consisting of tunneling and intrinsic resistances to examine the effect of deformation on the percolation threshold and the effective electrical conductivity. The results revealed that the filler alignment caused by strain changed both the vertical and lateral percolation thresholds, albeit with different trends. With an increase of uniaxial tensile (or equivalently, biaxial compressive) strain, applied on the vertical direction, the vertical percolation threshold initially reached a minimum value before rising, while the lateral percolation threshold monotonically increased. On the other hand, following incremental uniaxial compression (or equivalently, biaxial tension), the lateral percolation threshold reached a minimum value before increasing, while the vertical percolation threshold monotonically increased. The same relationship was observed in CPCs containing 1D fillers with different aspect ratios. The validity of the theoretical models was verified by comparing the predicted electrical conductivity values with the experimentally observed data obtained from polypropylene - multiwalled carbon nanotube nanocomposites.
引用
收藏
页数:9
相关论文
共 67 条
[1]   Destruction and formation of a conductive carbon nanotube network in polymer melts:: In-line experiments [J].
Alig, Ingo ;
Lellinger, Dirk ;
Engel, Martin ;
Skipa, Tetyana ;
Poetschke, Petra .
POLYMER, 2008, 49 (07) :1902-1909
[2]   Conductivity spectroscopy on melt processed polypropylene-multiwalled carbon nanotube composites:: Recovery after shear and crystallization [J].
Alig, Ingo ;
Lellinger, Dirk ;
Dudkin, Sergej M. ;
Poetschke, Petra .
POLYMER, 2007, 48 (04) :1020-1029
[3]   Polypropylene/carbon nanotube nano/microcellular structures with high dielectric permittivity, low dielectric loss, and low percolation threshold [J].
Ameli, A. ;
Nofar, M. ;
Park, C. B. ;
Poetschke, P. ;
Rizvi, G. .
CARBON, 2014, 71 :206-217
[4]   Electrical properties and electromagnetic interference shielding effectiveness of polypropylene/carbon fiber composite foams [J].
Ameli, A. ;
Jung, P. U. ;
Park, C. B. .
CARBON, 2013, 60 :379-391
[5]   Through-plane electrical conductivity of injection-molded polypropylene/carbon-fiber composite foams [J].
Ameli, A. ;
Jung, P. U. ;
Park, C. B. .
COMPOSITES SCIENCE AND TECHNOLOGY, 2013, 76 :37-44
[6]   A facile method to increase the charge storage capability of polymer nanocomposites [J].
Ameli, Aboutaleb ;
Wang, Sai ;
Kazemi, Yasamin ;
Park, Chul B. ;
Poetschke, Petra .
NANO ENERGY, 2015, 15 :54-65
[7]   Lightweight Polypropylene/Stainless-Steel Fiber Composite Foams with Low Percolation for Efficient Electromagnetic Interference Shielding [J].
Ameli, Aboutaleb ;
Nofar, Mohammadreza ;
Wang, Sai ;
Park, Chul B. .
ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (14) :11091-11100
[8]   Highly Stretchable and Sensitive Strain Sensor Based on Silver Nanowire-Elastomer Nanocomposite [J].
Amjadi, Morteza ;
Pichitpajongkit, Aekachan ;
Lee, Sangjun ;
Ryu, Seunghwa ;
Park, Inkyu .
ACS NANO, 2014, 8 (05) :5154-5163
[9]   Nanoparticle polymer composites: Where two small worlds meet [J].
Balazs, Anna C. ;
Emrick, Todd ;
Russell, Thomas P. .
SCIENCE, 2006, 314 (5802) :1107-1110
[10]   Piezoresistive behavior study on finger-sensing silicone rubber/graphite nanosheet nanocomposites [J].
Chen, Ling ;
Chen, Guohua ;
Lu, Liang .
ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (06) :898-904