Large dielectric constant of the chemically functionalized carbon nanotube/polymer composites

Temperature dependence of the electrical properties of the carbon nanotube/polymer composites

“…The electrical conductivity of these two kinds of composites increased significantly with low MWCNT concentration. The conductivity can be analyzed with the critical MWCNT concentration, percolation threshold p c , by the following scaling law [14][15][16] (Equation (1)): The percolation threshold of these composites by calculating is about 3.8 vol%. The conductivity of the pristine MWCNT/PVDF composites increases remarkably near the percolation threshold, and exhibits a typical insulator-conductor transition.…”

Preparation and Electrical Properties of Epoxy Resin Reinforced with Functionalized Carbon Nanotubes

“…This bundling of the nanotubes reduces their aspect ratio and decreases the dielectric constant. The PNCs with a high dielectric constant can be used in high charge-storage capacitors [16].But the ε'' value for the cured u-CNT PNCs increases as the u-CNT loading increases, while the ε'' value for the cured f-CNT PNCs decreases as the f-CNT loading increases as shown in Fig. (2) due to a phase lag between molecular orientation and electric field.…”

Preparation and characterization of polyamide 6 nanocomposites using MWCNTs based on bimetallic Co-Mo/MgO catalyst

“…This may explain the inferior strength of the PA6/CNT nanocomposites as observed in this study. As has been reported in different studies, in order to increase interaction between CNTs and polymers, chemical functionalization of CNTs is performed [34][35][36]. On the other hand, one of the interesting properties of CNTs is their electrical properties.…”