Broadband dielectric/electric properties of epoxy thin films filled with multiwalled carbon nanotubes

Jan Macutkevic; Polina P. Kuzhir; Alesia G. Paddubskaya; Juras Banys; Sergey A. Maksimenko; Eleonora Stefanutti; Federico Micciulla; Stefano Bellucci

doi:10.1117/1.JNP.7.073593

2 April 2013 Broadband dielectric/electric properties of epoxy thin films filled with multiwalled carbon nanotubes

Jan Macutkevic, Polina P. Kuzhir, Alesia G. Paddubskaya, Juras Banys, Sergey A. Maksimenko, Eleonora Stefanutti, Federico Micciulla, Stefano Bellucci

Author Affiliations +

Journal of Nanophotonics, Vol. 7, Issue 1, 073593 (April 2013). https://doi.org/10.1117/1.JNP.7.073593

Abstract

Many attempts have been made to fully explore flexibility, resistance to corrosion, and processing advantage of epoxy resin filled with carbon nanotubes (CNTs) as conductive filler, although sometimes with a certain degradation of polymers’ intrinsic properties. It is important to move the percolation threshold into the region of smaller CNTs’ concentration. The results of a broadband dielectric investigation of multiwalled CNT (MWCNT)/epoxy resin composites in wide temperature range from room temperature to 450 K were analyzed for percolation. Far below the percolation threshold (0.25 wt. % MWCNT) the dielectric properties of the composite are mostly determined by alpha relaxation in pure polymer matrix and the freezing temperature decreases due to the extra free volume at the polymer–filler interface. Close to the percolation threshold, the composite shows the negative temperature coefficient effect in the temperature region, where the pure polymer matrix becomes conductive. The activation energy of DC conductivity increases with the MWCNT concentration far below the percolation threshold and decreases close to it (1.5 wt. % MWCNT). The dielectric analysis of the MWCNT/epoxy resin reveals a significant influence of the polymer matrix on the temperature dependence of composite dielectric properties.

Citation Download Citation

Jan Macutkevic, Polina P. Kuzhir, Alesia G. Paddubskaya, Juras Banys, Sergey A. Maksimenko, Eleonora Stefanutti, Federico Micciulla, and Stefano Bellucci "Broadband dielectric/electric properties of epoxy thin films filled with multiwalled carbon nanotubes," Journal of Nanophotonics 7(1), 073593 (2 April 2013). https://doi.org/10.1117/1.JNP.7.073593

Published: 2 April 2013

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available