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Manuscript ID : 708259 Visit : 280 Page: 63 - 80

20.1001.1.20083815.2023.17.4.4.3

Article Type: Original Research

Synthesis, characterization and Microwave Absorption Properties of Novel Hard-soft Ferrite and Polyaniline-loaded Nanocomposite

Subject Areas : Polymer

Tolou Pourashraf 1 , Mohammad Yousefi 2 , Saeid Shokri 3 , َAbbas Ahmadi 4 , Parviz Aberoomand Azar 5

1 - Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 - Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
3 - Digital Transformation Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
4 - Department of Chemistry, Faculty of Science, Karaj Branch, Islamic Azad University, Karaj, Iran
5 - Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

Received: 2023-12-13 Accepted : 2023-12-13 Published : 2023-10-01

Keywords:

Abstract :

Nanocomposites of hard-soft ferrites (SrFe12O19) (1-x)/(Ni0.4Mn0.2Zn0.4Fe2O4) x with x = 0.2, 0.4, 0.6,and 0.8 are synthesized by the auto-combustion sol-gel method. In-situ polymerization is used to create polyaniline and hard-soft ferrite nanocomposites. X-ray powder diffractometers (XRD), field emission scanning electron microscopes (FESEM), Fourier transform infrared spectra (FTIR),vibrating sample magnetometers (VSM), and vector network analyzers (VNA) have all been used to evaluate the structure, morphology, magnetic properties, and microwave absorption ofnanocomposites. FT-IR spectra are used to confirm and validate the existence of both tetrahedral and octahedral complexes, as well as the interactions between polymer chains and hard and soft nanoparticles, which show that ferrite nanocomposites are coated with polymers. In hard-soft and polymeric nanocomposites, XRD analysis reveals the presence of pure hard and soft phase characteristics as well as PANI characteristics. SEM images show that the particles agglomerate in hard-soft composites as the soft phase rises as a result of being magnetic, and images for polymericcomposites show cohesive PANI particles that surround the hard-soft ferrite particle's surface.These findings demonstrate that PANI and hard-soft ferrites can be properly connected. VSM analysis revealed that by adding polymers, the magnetic properties of hard-soft composites dropped significantly due to the nonmagnetic effects of PANI. The VNA test shows that PANI/(SrFe12O19)0.4/(Ni0.4Mn0.2Zn0.4Fe2O4)0.6 exhibits optimized reflection loss from -1.84 to -16.53 in the X-Band (8-12.5 GHz frequency range) when compared to (SrFe12O19)0.4/ (Ni0.4Mn0.2Zn0.4Fe2O4) 0.6 with a matching thickness of 3 mm.

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