polymerjournals Chemistry, materials, technology
Polymers and Polymer Composites

DIELECTRIC PROPERTIES OF COMPOSITES OF MULTI-WALLED CARBON NANOTUBES IN A RESIN MATRIX

March 1, 2003 By: Allaoui A; Bai J B; Rieux N Research article

Title: DIELECTRIC PROPERTIES OF COMPOSITES OF MULTI-WALLED CARBON NANOTUBES IN A RESIN MATRIX
Page Range: p.171-178
Author(s): Allaoui A; Bai J B; Rieux N
File size: 130K
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 11
Issue No: No. 3

Abstract
The dielectric properties of a multi-walled carbon nanotube (MWNT)/epoxy composite are studied by impedance spectroscopy. Results showed that the addition of a small amount of MWNT increases the permittivity of the resin by many orders of magnitude. The insulator-to-conductor transition, which occurred when a few wt% of MWNTs was added to the matrix, is said to be related to a percolation phenomenon with non-universal critical exponent. Two types of MWNTs treatment are compared, and the results are claimed to demonstrate that MWNTs should be used in as-prepared state. The treatment is shown to alter their morphology, and reduce the aspect ratio by a factor of 10, leading to a modification of the shape of the insulator-to-conductor transition curve and a decrease of the global improvement. 15 refs.

Related reading

More journal reading and science coverage connected to this topic.