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Enhanced dielectric permittivity of fluorine polyimide matrix with embedded graphene
Author(s) -
Liu Jingni,
Song Jingda,
Qi Shengli,
Tian Guofeng,
Wu Dezhen
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201307193
Subject(s) - graphene , polyimide , dielectric , materials science , percolation threshold , permittivity , composite material , dielectric permittivity , percolation (cognitive psychology) , percolation theory , fluorine , polymer , layer (electronics) , polymer chemistry , conductivity , nanotechnology , electrical resistivity and conductivity , chemistry , optoelectronics , electrical engineering , metallurgy , engineering , neuroscience , biology
Abstract A polymer nanohybrid material with enhanced dielectric permittivity was prepared using the fluorine‐containing polyimide (PI) 4,4′‐(hexafluoroisopropylidene)diphthalic anhydride/4,4′‐oxydianiline (6FDA/ODA) as matrix and graphene as conductive filler in our present work. Studies on the dielectric properties of the 6FDA/ODA–graphene nanohybrid films show that the dielectric permittivity ( ε ) can be significantly enhanced by the layer‐by‐layer structure of graphene and the presence of fluorine also has an important influence on the improvement of ε . The percolation theory and microcapacitor model are used to explain the change of dielectric properties and a percolation threshold f c = 0.0152 (2.45 wt%) was obtained by a linear‐fit calculation.(© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)