Enhanced Electromagnetic Interference Shielding Through the Use of Functionalized Carbon-Nanotube-Reactive Polymer Composites

Author

Park, Sung-Hoon ; Theilmann, Paul T. ; Asbeck, Peter M. ; Bandaru, Prabhakar R.

Author_Institution

Dept. of Mech. & Aerosp. Eng., Univ. of California at San Diego, San Diego, CA, USA

Volume

9

Issue

4

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

464

Lastpage

469

Abstract

We report on a new principle yielding enhanced electromagnetic shielding, using as an example a composite comprised of carbon nanotubes (CNTs) integrated with a reactive ethylene terpolymer (RET). Such composites were synthesized through the chemical reaction of the functional groups on the CNT with the epoxy linkage of the RET polymer. The main advantages of these composites include good dispersion with low electrical percolation volume fractions (~0.1 volume%), yielding outstanding microwave shielding efficiency for electromagnetic interference applications. The shielding effectiveness was characterized for both single-walled and multiwalled CNT-based composites and was much enhanced in the former. The specific roles of absorption and reflection in determining the total shielding, as a function of the nanotube filling fraction, is also discussed.

Keywords

carbon nanotubes; electromagnetic interference; electromagnetic shielding; epoxy insulation; electrical percolation volume fractions; electromagnetic interference shielding; epoxy linkage; functionalized carbon-nanotube-reactive polymer composites; microwave shielding efficiency; nanotube filling fraction; reactive ethylene terpolymer; Carbon nanotubes (CNTs); functionalization; polymer composites electromagnetic interference shielding;

fLanguage

English

Journal_Title

Nanotechnology, IEEE Transactions on

Publisher

ieee

ISSN

1536-125X

Type

jour

DOI

10.1109/TNANO.2009.2032656

Filename

5282625