Effects of graphene nanoplatelet size and surface area on the AC electrical conductivity and dielectric constant of epoxy nanocomposites

Ravindran, A, Feng, C, Huang, S, Wang, Y, Zhao, Z and Yang, J 2018, 'Effects of graphene nanoplatelet size and surface area on the AC electrical conductivity and dielectric constant of epoxy nanocomposites', Polymers, vol. 10, no. 5, pp. 1-17.


Document type: Journal Article
Collection: Journal Articles

Attached Files
Name Description MIMEType Size
n2006083640.pdf Published Version application/pdf 4.73MB
Title Effects of graphene nanoplatelet size and surface area on the AC electrical conductivity and dielectric constant of epoxy nanocomposites
Author(s) Ravindran, A
Feng, C
Huang, S
Wang, Y
Zhao, Z
Yang, J
Year 2018
Journal name Polymers
Volume number 10
Issue number 5
Start page 1
End page 17
Total pages 17
Publisher M D P I AG
Abstract Epoxy nanocomposites reinforced with various grades of multilayer graphene nanoplatelets (GNPs) are manufactured and tested. The effects of size, surface area, and concentration of GNP, as well as alternating current (AC) frequency on the electrical and dielectric properti es of epoxy nanocomposites are experimentally investigated. GNPs with larger size and surface area are always beneficial to increase the electrical conductivity of the composites. However, their effects on the dielectric constant are highly dependent on GNP concentration and AC frequency. At lower GNP concentration, the dielectric constant increases proportionally with the increase in GNP size, while decreasing as the AC frequency increases. At higher GNP concentration in epoxy, the dielectric constant first increases with the increase of the GNP size, but decreases thereafter. This trend is also observed for varying the processed GNP surface area on the dielectric constant. Moreover, the variations of the electrical conductivity and dielectric constant with the GNP concentration and AC frequency are then correlated with the measured interfiller spacing and GNP diameter.
Subject Materials Engineering not elsewhere classified
Keyword(s) Dielectric constant
Electrical conductivity
Epoxy nanocomposites
Graphene platelet
DOI - identifier 10.3390/polym10050477
Copyright notice © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
ISSN 2073-4360
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 11 Abstract Views, 10 File Downloads  -  Detailed Statistics
Created: Wed, 19 Sep 2018, 13:27:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us