Enhanced Dielectric Performance in Polymer Composite Films with Carbon Nanotube-Reduced Graphene Oxide Hybrid Filler
- Authors
- Kim, Jin-Young; Kim, TaeYoung; Suk, Ji Won; Chou, Harry; Jang, Ji-Hoon; Lee, Jong Ho; Kholmanov, Iskandar N.; Akinwande, Deji; Ruoff, Rodney S.
- Issue Date
- 27-Aug-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- carbon nanotube; chemical vapor deposition; dielectric performance; polymer composite film; reduced graphene oxide
- Citation
- SMALL, v.10, no.16, pp.3405 - 3411
- Journal Title
- SMALL
- Volume
- 10
- Number
- 16
- Start Page
- 3405
- End Page
- 3411
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/12375
- DOI
- 10.1002/smll.201400363
- ISSN
- 1613-6810
- Abstract
- The electrical conductivity and the specific surface area of conductive fillers in conductor-insulator composite films can drastically improve the dielectric performance of those films through changing their polarization density by interfacial polarization. We have made a polymer composite film with a hybrid conductive filler material made of carbon nanotubes grown onto reduced graphene oxide platelets (rG-O/CNT). We report the effect of the rG-O/CNT hybrid filler on the dielectric performance of the composite film. The composite film had a dielectric constant of 32 with a dielectric loss of 0.051 at 0.062 wt% rG-O/CNT filler and 100 Hz, while the neat polymer film gave a dielectric constant of 15 with a dielectric loss of 0.036. This is attributed to the increased electrical conductivity and specific surface area of the rG-O/CNT hybrid filler, which results in an increase in interfacial polarization density between the hybrid filler and the polymer.
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