Open AccessFacile Synthesis of Polyindole/Ni1–xZnxFe2O4(x= 0, 0.5, 1) Nanocomposites and Their Enhanced Microwave Absorption and Shielding Properties
Author(s) -
Anjitha Thadathil,
Jithesh Kavil,
K. Raj,
Chamundi P Jijil,
Pradeepan Periyat
Publication year - 2022
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.2c00824
Subject(s) - materials science , nanocomposite , analytical chemistry (journal) , reflection loss , microwave , scanning electron microscope , dielectric loss , fourier transform infrared spectroscopy , thermogravimetric analysis , transmission electron microscopy , dielectric , nanotechnology , chemical engineering , composite material , optoelectronics , chemistry , physics , chromatography , quantum mechanics , composite number , engineering
The present work reports the fabrication of polyindole (PIN)/Ni 1- x Zn x Fe 2 O 4 ( x = 0, 0.5, 1) nanocomposites as efficient electromagnetic wave absorbers by a facile in situ emulsion polymerization method for the first time. The samples were characterized through Fourier transform infrared spectroscopy, UV-vis spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, high-resolution transmission electron microscopy, and vibrating sample magnetometry. The resulting polyindole/Ni 1- x Zn x Fe 2 O 4 ( x = 0, 0.5, 1) nanocomposites offer better synergism among the Ni 1- x Zn x Fe 2 O 4 nanoparticles and PIN matrix, which significantly improved impedance matching. The best impedance matching of Ni 1- x Zn x Fe 2 O 4 /polyindole ( x = 0, 0.5, 1) nanocomposites was sought out, and the minimum reflection loss of the composites can reach up to -33 dB. The magnetic behavior, complex permittivity, permeability, and microwave absorption properties of polyindole/Ni 1- x Zn x Fe 2 O 4 ( x = 0, 0.5, 1) nanocomposites have also been studied. The microwave absorbing characteristics of these composites were investigated in the 8-12 GHz range (X band) and explained based on eddy current, natural and exchange resonance, and dielectric relaxation processes. These results provided a new idea to upgrade the performance of conventional microwave-absorbing materials based on polyindole in the future.