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Few‐layer‐graphene/polycarbonate nanocomposites as dielectric and conducting material
Author(s) -
Sain P. K.,
Goyal R. K.,
Prasad Y. V. S. S.,
Sharma K. B.,
Bhargava A. K.
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42443
Subject(s) - materials science , graphene , nanocomposite , dielectric , percolation threshold , polycarbonate , raman spectroscopy , conductivity , composite material , scanning electron microscope , dielectric spectroscopy , percolation (cognitive psychology) , transmission electron microscopy , electrical resistivity and conductivity , nanotechnology , optics , electrode , optoelectronics , chemistry , electrochemistry , physics , engineering , neuroscience , electrical engineering , biology
An attempt is taken to develop a flexible and light weight polycarbonate‐based nanocomposite system which could be successfully used as a dielectric material below percolation and as conducting material beyond percolation. The nanocomposite system has been prepared by solution mixing method in which few layer graphene was incorporated as conductive filler. X‐ray diffractometry, Raman spectroscopy, transmission electron microscopy, scanning electron microscopy techniques were employed for characterization studies. The dielectric constant and conductivity were evaluated using precision impedance analyzer. Percolation threshold has been observed to occur at 3.5 wt % of few layer graphene. Dielectric constant of the nanocomposite system, in the smearing region, has been found to increase from ∼3.3 (without filler) to ∼70 (at 5 wt % FLG) with a dissipation factor of 0.07. The conductivity of the system was increased from 10 −9 S/cm without FLG to 10 −2 S/cm with 7 wt % of few layer graphene. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42443.