Title

The Role of Carbon Nanofiber Defects on the Electrical and Mechanical Properties of CNF-Based Resins

Document Type

Article

Publication Date

7-2013

Publication Source

Nanotechnology

Abstract

Heat treatment of carbon nanofibers has proven to be an effective method in removing defects from carbon nanofibers, causing a strong increase in their structural perfection and thermal stability. It affects the bonding states of carbon atoms in the nanofiber structure and causes a significant transformation in the hybridization state of the bonded carbon atoms.

Nanofilled resins made of heat-treated CNF show significant increases in their electrical conductivity even at low concentrations. This confirms that enhancement in the perfection of the fiber structure with consequent change in the morphological features plays a prominent role in affecting the electrical properties. Indeed heat-treated CNFs display a stiff structure and a smooth surface which tends to lower the thickness of the unavoidable insulating epoxy layer formed around the CNF which, in turn, plays a fundamental role in the electrical transport properties along the conducting clusters. This might be very beneficial in terms of electrical conductivity but might have negligible effect on the mechanical properties.

Inclusive pages

1-10

ISBN/ISSN

0957-4484

Publisher

IOP Publishing

Volume

24

Issue

30

Peer Reviewed

yes