Effect of Synthesis Approaches and Morphological Properties on Dielectric Enhancement and Microwave Absorption of Fe{sub 3}O{sub 4}/PANI Nanocomposites

Journal Article · Sat Jun 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4866-6· OSTI ID:22921241

Mahmoudi-Badiki, Tohid ^[1]; Arsalani, Nasser ^[2]; Jafarian, Mojtaba ^[3]; Stergiou, Charalampos A. ^[4]

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1. University of Tabriz, Department of Applied Chemistry, Faculty of Chemistry (Iran, Islamic Republic of)
2. University of Tabriz, Research Laboratory of Polymer, Department of Organic and Biochemistry, Faculty of Chemistry (Iran, Islamic Republic of)
3. Islamic Azad University, Department of Mechanical Engineering, Faculty of Engineering, Tehran North Branch (Iran, Islamic Republic of)
4. Aristotle University, Laboratory of Materials for Electrotechnics, Department of Electrical and Computer Engineering (Greece)

In the present work, Fe{sub 3}O{sub 4} spherical (Fe{sub 3}O{sub 4}-cop) and raspberry-like (Fe{sub 3}O{sub 4}-hyd) nanoparticles were synthesized via co-precipitation and hydrothermal routes, respectively. Fe{sub 3}O{sub 4}/polyaniline (PANI) nanocomposites were prepared by in situ oxidative polymerization of aniline monomer in the presence of the Fe{sub 3}O{sub 4} materials. Characterization of the nanocomposites by XRD, FT-IR, FESEM, and TEM techniques revealed a core/shell structure for Fe{sub 3}O{sub 4}-hyd/PANI, unlike the PANI blocks with embedded Fe{sub 3}O{sub 4} and γ-Fe{sub 2}O{sub 3} observed in Fe{sub 3}O{sub 4}-cop/PANI composites. The larger and pure magnetite nanoparticles produced with the hydrothermal process and the respective nanocomposite with PANI possess higher magnetization and coercivity values, according to the magnetic investigation with VSM. Moreover, according to the electromagnetic characterization in the X-band, the Fe{sub 3}O{sub 4}-hyd/PANI nanocomposite exhibits the highest complex permittivity level, as a consequence of increased interfacial polarization in the Fe{sub 3}O{sub 4}-hyd/PANI system. On this account, reflection loss measurements have shown the superior microwave absorption capability of Fe{sub 3}O{sub 4}-hyd/PANI composite, compared with Fe{sub 3}O{sub 4}-cop/PANI, with a measured maximum of −31.28 dB at 8.5 GHz for 3.5 mm layer thickness.

• OSTI ID: 22921241
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 6; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ANILINE
COERCIVE FORCE
COPRECIPITATION
DIELECTRIC MATERIALS
FOURIER TRANSFORMATION
INFRARED SPECTRA
IRON OXIDES
MAGNETITE
MAGNETIZATION
MICROWAVE RADIATION
MONOMERS
NANOCOMPOSITES
NANOPARTICLES
POLARIZATION
POLYMERIZATION
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION