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Microwave absorption property of polyaniline nanocomposites containing TiO 2 and Fe 3 O 4 nanoparticles after FeCl 3 6H 2 O treatment
Author(s) -
Phang Sook Wai,
Kuramoto Noriyuki
Publication year - 2010
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.20838
Subject(s) - materials science , nanocomposite , polyaniline , polymerization , absorption (acoustics) , nanoparticle , dielectric , nanorod , conductive polymer , microwave , chemical engineering , conductivity , in situ polymerization , nuclear chemistry , polymer , composite material , nanotechnology , chemistry , physics , optoelectronics , quantum mechanics , engineering
It is important to manipulate the synthesis parameters or additives used in order to produce conducting polymer such as polyaniline (PAni) with moderate conductivity, magnetic and dielectric properties that could enhance its microwave absorbing and shielding properties. In this communication, novel PAni/HA/TiO 2 /Fe 3 O 4 nanomaterials with different Fe 3 O 4 contents were prepared by template‐free method by using TiO 2 and Fe 3 O 4 nanoparticles as dielectric filler and magnetic filler, respectively. Before addition of ammonium peroxydisulfate (APS) for polymerization, Fe 3 O 4 aqueous solution was treated with FeCl 3 6H 2 O in order to disperse well the Fe 3 O 4 in the mixture. The result shows that better dispersion of Fe 3 O 4 in the mixture by FeCl 3 6H 2 O treatment could significantly improve the conductivity of the nanocomposites and also activate the formation of nanorods/tubes. Moreover, PAni/HA/TiO 2 /Fe 3 O 4 nanocomposites treated with FeCl 3 6H 2 O show better microwave absorption (99.950–99.999% absorption) compared with PAni/HA/TiO 2 /Fe 3 O 4 micro/nanocomposites (67.0− 99.4% absorption) without treatment in frequency range of 10–13 GHz. Among the prepared PAni/HA/TiO 2 /Fe 3 O 4 micro/nanocomposites and nanocomposites, PAni/HA/TiO 2 /Fe 3 O 4 nanocomposite (treated with FeCl 3 6H 2 O) with 40% Fe 3 O 4 exhibit the best microwave absorption (99.999% absorption at 10 GHz) because of its high conductivity, high heterogeneity and moderate magnetization. POLYM. COMPOS., 2010. © 2010 Society of Plastics Engineers