A novel approach to predict the electrical conductivity of multifunctional nanocomposites

On the mechanism of piezoresistivity of carbon nanotube polymer composites

“…Table 1 shows the physical parameters used in the following numerical analyses. In addition, three representative values of CNT intrinsic conductivity σ cnt are selected in the present analyses, ranging from 0.5 × 10 4 , 1 × 10 4 and 2 × 10 4 S/m respectively [22][23][24]. This is because the exact values of σ cnt were not reported in the experimental studies of electrical conductivity in the literature.…”

“…It is reasonable to assume that the electron conduction at CNT junctions is approximated as onedimensional ballistic transport [32]. Using the 1D Landauer-Büttiker (L-B) formula of electron transport theory, a new contact resistance model was developed by considering only the tunneling effect with two parameters: transmission probability and channel number [8,[22][23][24].…”

Ordered and Highly Conductive Carbon Nanotube Nano‐Networks in a Semiconducting Polymer Film by Solution Processing

“…Smaller aggregates lead to conductivities closer to their theoretical limit compared to bigger aggregates. [14][15][16] Other critical factors also play a role in the composite conductivity, such as the aspect ratio of the carbon nanotubes as well as their disentanglement. [ 17,18 ] It has been shown that high aspect ratio nanotubes at high concentration (above 3 wt%) can be simply mixed with polymers to create dendritic networks similar to vein patterns found in nature, leading to a 10 times increase in the conductivity of a rubber composite.…”

“…[ 19 ] Specifi c alignment of the nanotubes has also been shown to affect the conductivity of composites, with the higher conductivities being obtained for partially rather than perfectly aligned networks. [ 16,20 ] Several dispersion techniques have been investigated to create conducting composites, including calendering processes, roll milling, or ultrasonication. [ 18,21,22 ] The nanotubes can also be mixed with specifi c polymers which will react to the temperature or the pH of the mixture in solution, allowing to control the nanotubes bundling.…”

Molecular dynamics and atomistic based continuum studies of the interfacial behavior of nanoreinforced epoxy

“…The exceptional properties of CNTs have shown great promise for a wide variety of applications, such as nanotransistors, semiconductors, hydrogen storage devices, structural materials, molecular sensors, fieldemission based displays, fuel cells, and as the ideal reinforcements for advanced nanocomposites (Endo et al, 2004;Bekyarova et al, 2007;Schmidt et al, 2007;Vaysse et al, 2009;Bao et al, 2012;Kundalwal and Ray, 2012). It is found that a few weight percentages of CNTs can significantly improve the interfacial and mechanical properties of CNT-based composites.…”