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High‐ k nanocomposites with modified double layer in carbon black‐epoxy system
Author(s) -
Yang Yooseong,
Jee Sang Soo,
Lee Eun Sung,
Lee Sangmock,
Kim Seyun,
Lee JaeChan,
Son Bui Thanh,
Bae JinYoung
Publication year - 2012
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.21263
Subject(s) - materials science , epoxy , dielectric , carbon black , dielectric loss , nanocomposite , passivation , composite material , percolation threshold , polymer , high κ dielectric , carbon fibers , layer (electronics) , composite number , electrical resistivity and conductivity , natural rubber , optoelectronics , engineering , electrical engineering
High dielectric constant ( K ), low dielectric loss (tan δ) polymer nanocomposite is achieved by introducing a modified electrical double layer in the carbon black (CB)‐epoxy system, rather than by exploiting the percolation of CB in the epoxy system, in which both the dielectric constant and loss are increased simultaneously. The modified electrical double layer is introduced in CB‐epoxy system when nanosized nickel oxides embedded in CB absorbs anionic surfactants. In addition to the ionic charges on the CB, high‐ k and low dielectric loss can be obtained because of CB passivation with the polymeric surfactant. The CB‐epoxy nanocomposite containing 3.1 vol% of modified CB exhibited a high dielectric constant of K 5200 and a low dielectric loss of tan δ 45% at 1 MHz. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers