Abstract
Poly (methyl methacrylate)/polyaniline/Fe3O4 nanocomposites were prepared by using casting technique. The nanocomposites films were characterized by various measurements. The XRD analysis shows that there is a complex relation between the Fe3O4 nanoparticles and the PMMA/PANI matrix. Moreover, According to XRD analysis, increasing the concentration of Fe3O4 nanoparticles inside the matrix of PMMA/PANI reduces the crystallinity of polymer films. The optical band gap reduces as the quantity of Fe3O4 nanoparticles in the PMMA/PANI matrix increases. The TEM analysis confirmed the produced nanoparticles appear to have a shape that is almost spherical. The UV–visible spectrophotometer's absorbance spectra were used to evaluate optical characteristics. When Fe3O4 nanoparticles are incorporated into the polymer matrix, the optical bandgap is reduced. Additionally, the electrical conductivity and dielectric characteristics of nanocomposites films were investigated. With an increase in nanoparticles' content, the dielectric characteristics, ac conductivity, and dielectric of the nanocomposites all dramatically increased. The blend's maximum AC conductivity is 4.77 10−8 Sm−1, after adding more Fe3O4, it increased to 8.07 10−6 Sm−1. The spin configurations of Fe3O4-filled PMMA/PANI are distinct, according to electron spin resonance (ESR) analysis. ESR parameters' filling level dependence was examined. According to the vibrating sample magnetometer (VSM) results, the produced nanocomposites have a ferromagnetic activity. Additionally, VSM analysis shows that increasing the concentration of nanoparticles increases magnetic characteristics such as saturation magnetization, coercivity, and squareness of the nanocomposites. The reported enhancements in optical, ac conductivity and magnetic characteristics support the inclusion of these nanocomposite films in magneto-electronic devices.
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