Abstract
In this study, a simple, affordable, broadband, and lightweight microwave absorbing nanocomposite was designed by a one-pot method using polyaniline (PANi)/Fe/Fe3O4/Fe2O3 as a guest and polymethylmethacrylate (PMMA) as a host. The PANi/Fe/Fe3O4/Fe2O3 nanocomposite was tailored trough complementary radical polymerization and reductive method. X-ray powder diffraction (XRD) patterns confirmed that PANi/Fe/Fe3O4/Fe2O3 nanostructure was formed. Moreover, PANi/Fe/Fe3O4/Fe2O3 nanocomposite was deeply explored using Fourier transform infrared (FT-IR), vibrating sample magnetometer (VSM), and field emission scanning electron microscopy (FE-SEM) analysis. According to the diffuse reflection spectroscopy (DRS), the designed nanostructure exhibited a narrow bandgap (1.37 eV) calculated by the Kubelka–Munk theory. The microwave absorbing characteristics were studied using a vector network analyzer (VNA). Based on the obtained results, the maximum reflection loss of PANi/Fe/Fe3O4/Fe2O3/PMMA nanocomposite was 72.61 dB at 10.9 GHz while absorbed >1.71 GHz more than 30 dB with a thickness of 3 mm. Notably, tailored nanocomposite approximately absorbed all over the x-band frequency from 2.6 to 3.6 mm >10 dB.
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