Premium
Electrospun magnetic carbon composite fibers: Synthesis and electromagnetic wave absorption characteristics
Author(s) -
Yang Ying,
Guo Zhen,
Zhang Huan,
Huang Daqing,
Gu Jialin,
Huang Zhenghong,
Kang Feiyu,
Alan Hatton T.,
Rutledge Gregory C.
Publication year - 2012
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.38027
Subject(s) - materials science , polyacrylonitrile , nanocomposite , composite material , composite number , nanoparticle , carbonization , electrospinning , magnetic nanoparticles , absorption (acoustics) , fiber , chemical engineering , nanotechnology , polymer , scanning electron microscope , engineering
Electrospun polyacrylonitrile (PAN)‐based carbon composite fibers embedded with magnetic nanoparticles have been developed as materials for electromagnetic wave absorption. The nanocomposite fibers were prepared by electrospinning from a dispersion of magnetite (Fe 3 O 4 ) nanoparticles stabilized by L ‐glutamic acid in a solution of PAN and N, N ‐dimethyl formamide. The Fe 3 O 4 ‐embedded PAN nanofibers were stabilized at 270°C in air and carbonized at 800°C in nitrogen. The Fe 3 O 4 nanoparticles were crystalline with a particle size of about 7 nm, most of which was reduced to Fe 3 C with agglomerates of up to 50 nm diameter in the carbon fibers. The carbon morphology was mostly disordered, but exhibited a layered graphitic structure in the vicinity of the nanoparticles. The carbon composite fiber exhibited ferromagnetic behavior, and the induced magnetic saturation per unit mass of fibers increased with increasing Fe 3 O 4 content in the precursor. The complex relative dielectric permittivity was tuned by adjusting the amount of Fe 3 O 4 in the carbon fiber precursor. With increasing Fe 3 O 4 content, good electromagnetic wave absorption characteristics were observed below 6 GHz, even for samples with fiber loadings as low as 5 wt %. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013