Electrical Properties Of Fiber And Carbon
Nanotube Reinforced Polymer Composites
Author(s)
H. Estrada, J. Trovillion, L. S. Lee, M. Tusz, A. Kumar
& L. D. Stephenson
Abstract
Heightened concerns for electromagnetic interference (EMI) in defense
applications have led to developments of multi-functional materials that can
provide structural performance while shielding electronic components from
electromagnetic waves. Since EMI shielding effectiveness is highly dependent
on electrical properties, the goal of this paper is to characterize the conductivity,
permittivity, and resistivity of fiber and Carbon Nanotube (CNT) reinforced
polymer composites (nanocomposites). The key component of the
nanocomposite is a non-woven textile formed using synthetic carbon nanofibers.
The material is proprietary and was obtained from Nanocomp Technologies, Inc
(www.nanocomptech.com).Electrical testing of specimens was conducted using a
low frequency impedance analyser in order to measure the conductivity and
resistivity of the nanocomposite for frequencies ranging from 0.1 kHz to
1000 kHz. The nanocomposite material’s EMI shielding effectiveness is
estimated to be approximately 46 dB for a resistivity of 0.88 Ohms/square.
Given the material’s average area density of 12.8 g/m2, these results can be
considered promising since the Nanocomp material can be incorporated into
conventional composites intended for load bearing applications in order to add
EMI shielding to the material with little additional weight.
Keywords: carbon nanotube, composites, electrical properties, electromagnetic
interference shielding.
Keywords
carbon nanotube, composites, electrical properties, electromagnetic
interference shielding
Related Book
Other papers in this volume
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