The influence of matrix mediated hopping conductivity, filler concentration, aspect ratio and orientation on the electrical response of carbon nanotube/polymer nanocomposites

2011 ◽  
Vol 71 (5) ◽  
pp. 643-646 ◽  
Author(s):  
J. Silva ◽  
S. Ribeiro ◽  
S. Lanceros-Mendez ◽  
R. Simões
Keyword(s):  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Polymer Nanocomposites ◽  
Electrical Response ◽  
Filler Concentration ◽  
Hopping Conductivity

scholarly journals Model Progress for Tensile Power of Polymer Nanocomposites Reinforced with Carbon Nanotubes by Percolating Interphase Zone and Network Aspects

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1047 ◽  
Author(s):  
Yasser Zare ◽  
Kyong Yop Rhee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Polymer Nanocomposites ◽  
Simple Simulation ◽  
Advanced Model

In the present work, a simple simulation is advanced based on a Callister equation considering the impacts of interphase and carbon nanotube (CNT) nets on the strength of nanocomposites after percolation onset. The advanced model can analyze the strength of nanocomposite by filler aspect ratio (α), percolation beginning ( φ p ), interphase depth (t), interphase power (σi), net density (N), and net power (σN). The empirical consequences of several samples agree with the estimations of the industrialised model. The nanocomposite strength straightly depends on “α”, “t”, “σi”, “N”, and “σN”, while the radius and percolation onset of CNT play the inverse characters. The reasonable impacts of net and interphase possessions on the nanocomposite strength rationalise the accurate progress of the Callister equation.

A computational approach to evaluate the nonlinear and noisy DC electrical response in carbon nanotube/polymer nanocomposites near the percolation threshold

2020 ◽  
Vol 173 ◽  
pp. 109439
Author(s):  
Abolfazl Alizadeh Sahraei ◽  
Moosa Ayati ◽  
Denis Rodrigue ◽  
Majid Baniassadi
Keyword(s):  
Carbon Nanotube ◽  
Percolation Threshold ◽  
Polymer Nanocomposites ◽  
Electrical Response ◽  
Computational Approach

Dual percolations of electrical conductivity and electromagnetic interference shielding in progressively agglomerated CNT/polymer nanocomposites

2021 ◽  
pp. 108128652110214
Author(s):  
Xiaodong Xia ◽  
George J. Weng
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Percolation Threshold ◽  
Polymer Nanocomposites ◽  
Electromagnetic Interference ◽  
Effective Medium Theory ◽  
Scale Model ◽  
Shielding Effectiveness ◽  
Emi Shielding

Recent experiments have revealed two distinct percolation phenomena in carbon nanotube (CNT)/polymer nanocomposites: one is associated with the electrical conductivity and the other is with the electromagnetic interference (EMI) shielding. At present, however, no theories seem to exist that can simultaneously predict their percolation thresholds and the associated conductivity and EMI curves. In this work, we present an effective-medium theory with electrical and magnetic interface effects to calculate the overall conductivity of a generally agglomerated nanocomposite and invoke a solution to Maxwell’s equations to calculate the EMI shielding effectiveness. In this process, two complex quantities, the complex electrical conductivity and complex magnetic permeability, are adopted as the homogenization parameters, and a two-scale model with CNT-rich and CNT-poor regions is utilized to depict the progressive formation of CNT agglomeration. We demonstrated that there is indeed a clear existence of two separate percolative behaviors and showed that, consistent with the experimental data of poly-L-lactic acid (PLLA)/multi-walled carbon nanotube (MWCNT) nanocomposites, the electrical percolation threshold is lower than the EMI shielding percolation threshold. The predicted conductivity and EMI shielding curves are also in close agreement with experimental data. We further disclosed that the percolative behavior of EMI shielding in the overall CNT/polymer nanocomposite can be illustrated by the establishment of connective filler networks in the CNT-poor region. It is believed that the present research can provide directions for the design of CNT/polymer nanocomposites in the EMI shielding components.

Interaction Stresses in Carbon Nanotube–Polymer Nanocomposites

2011 ◽  
Vol 3 (9) ◽  
pp. 3425-3431 ◽  
Author(s):  
Meysam Rahmat ◽  
Kaushik Das ◽  
Pascal Hubert
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites

Relations between the aspect ratio of carbon nanotubes and the formation of percolation networks in biodegradable polylactide/carbon nanotube composites

2010 ◽  
Vol 48 (4) ◽  
pp. 479-489 ◽  
Author(s):  
Defeng Wu ◽  
Liang Wu ◽  
Weidong Zhou ◽  
Yurong Sun ◽  
Ming Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

A data-driven computational homogenization method based on neural networks for the nonlinear anisotropic electrical response of graphene/polymer nanocomposites

2018 ◽  
Vol 64 (2) ◽  
pp. 307-321 ◽  
Author(s):  
Xiaoxin Lu ◽  
Dimitris G. Giovanis ◽  
Julien Yvonnet ◽  
Vissarion Papadopoulos ◽  
Fabrice Detrez ◽  
...  
Keyword(s):  
Neural Networks ◽  
Polymer Nanocomposites ◽  
Electrical Response ◽  
Homogenization Method ◽  
Computational Homogenization ◽  
Data Driven

A Carbon Nanotubes Aggregation in Polymer Nanocomposites

2018 ◽  
Vol 935 ◽  
pp. 55-60 ◽  
Author(s):  
Louise B. Atlukhanova ◽  
George V. Kozlov
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Packing Density ◽  
Elasticity Modulus ◽  
Aggregation Process ◽  
Walk Dimension

Carbon nanotubes aggregation process in aggregates (bundles) has been studied. This process results in essential reduction of nanocomposites attainable elasticity modulus. The bundles packing density is defined by aggregation expectation time and corresponding carbon nanotube walk dimension up to sticking with a similar nanotube.

Carbon Nanotube Hybrids and Their Polymer Nanocomposites

2019 ◽  
pp. 29-60 ◽  
Author(s):  
Raja Nor Othman ◽  
Arthur Norman Wilkinson
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites

scholarly journals A computer simulation of stress transfer in carbon nanotube/polymer nanocomposites

2019 ◽  
Vol 163 ◽  
pp. 236-242 ◽  
Author(s):  
Jiawei Zhao ◽  
Mo Song
Keyword(s):  
Computer Simulation ◽  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Stress Transfer
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