Facile preparation of epoxy nanocomposites with highly dispersed graphite nanosheets and their dielectric properties

Kiwon Oh, Taeho Kim, Sang Soo Lee, Soonho Lim, Daeheum Kim, Heesuk Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Very thin graphite nanosheets (GNSs) with 11 nm thickness and 250 nm in lateral size were simply prepared from bulk graphite via an ultrasonication and centrifugation in N,N-dimethylformamide (DMF) without any chemical treatments such as using surfactants. GNSs/epoxy nanocomposites with 3 wt% GNSs showed a high dielectric constant (710) and relatively low dielectric loss tangent (less than 0.5) at low frequency (100 Hz). This great improvement in the dielectric properties could be attributed to very thin thickness, excellent dispersibility and sheet-like shape of GNSs in comparison with graphite or thick GNSs.

Original languageEnglish
Pages (from-to)1197-1200
Number of pages4
JournalMacromolecular Research
Volume20
Issue number11
DOIs
Publication statusPublished - 2012 Nov

Keywords

  • Dielectric properties
  • Dispersion.
  • Graphite nanosheets
  • Nanocomposites

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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