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Effect of Fe 3 O 4 and TiO 2 addition on the microwave absorption property of polyaniline micro/nanocomposites
Author(s) -
Phang Sook Wai,
Tadokoro Masato,
Watanabe Jiro,
Kuramoto Noriyuki
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1381
Subject(s) - materials science , nanocomposite , polyaniline , thermogravimetric analysis , scanning electron microscope , fourier transform infrared spectroscopy , microwave , dielectric , absorption (acoustics) , conductivity , polymerization , nanorod , analytical chemistry (journal) , chemical engineering , composite material , polymer , nanotechnology , organic chemistry , optoelectronics , chemistry , physics , quantum mechanics , engineering
In this communication, novel hexanoic acid (HA) doped PAni micro/nanocomposites containing TiO 2 (dielectric filler, 30 nm) and Fe 3 O 4 (magnetic filler, 1 µm) that possess high conductivity, dielectric, and magnetic properties are reported. The micro/nanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), ultraviolet (UV) spectrophotometer, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) analyses. The conductivity, dielectric, magnetic, and microwave absorption properties of the micro/nanocomposites are discussed. The resultant nanorods/tubes shown in the SEM images indicate that PAni micro/nanocomposites exhibit polymerization through elongation. The results show that synthesis parameters such as amount and particle size of TiO 2 and Fe 3 O 4 used significantly affect the morphology, conductivity, and microwave absorption property of the resultant PAni. PAni/HA/TiO 2 /Fe 3 O 4 with 40% of Fe 3 O 4 achieves the best performance of microwave absorption (greater than 99.4% absorption) at high frequency and suitable to be applied as a good microwave absorbing and shielding material. Copyright © 2009 John Wiley & Sons, Ltd.