Polyaniline/Fe3O4 coated on MnFe2O4 nanocomposite: Preparation, characterization, and applications in microwave absorption

Abstract

Conductive polyaniline (PANi)/Fe3O4 is coated on the MnFe2O4 nanocomposite with multi core shell structure was synthesized by in-situ polymerization in the presence of dodecyl benzene sulfonic acid (DBSA) as the surfactant and dopant and ammonium persulfate (APS) as the oxidant. The structure and magnetic properties of Fe3O4 coated on the MnFe2O4 nanoparticles were studied by using powder X-ray diffraction (XRD) and vibrating sample magnetometer (VSM), respectively. The morphology, microstructure and DC conductivity of the nanocomposite were characterized by scanning electron Microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and four-wire-technique, respectively. The microwave absorbing properties of the nanocomposite dispersed in resin acrylic with thickness of 1.4 mm were investigated by a HP 8720B vector network analyzer and standard horn antennas in Anechoic chamber in the frequency range of 8–12GHz. A minimum reflection loss of -18 dB was observed at 8.6 GHz. Key words: Nano-structures, polymer-matrix composites (PMCs), magnetic properties, microwave absorption (nominated).