Advancing X-Band Electromagnetic Interference Shielding: Single-Layer Thin Films of Fe3O4-MWCNT (1:2)-PVDF Meta-Nanocomposite Fabricated by Low-Cost Drop-Casting Process

This study, investigate of ternary thermoplastic fluoropolymer blend nanocomposite (NC) system for improved microwave (MW) shielding, consisting of polyvinyl dimethylamine fluoride (PVDF) and Fe3O4-multiwalled carbon nanotube (MWCNT) (1:2) NC. Using a hydrothermal process, complex hierarchical nanostructures (NSs) of Fe3O4-MWCNT (1:2) NC are produced. These NSs are then integrated using a drop-casting technique into PVDF matrices with different wt% (20, 40, and 60 wt%) and thicknesses (20, 50, and 80 mu m). The single-layer thin films (SLFs) with the Fe3O4-MWCNT (1:2)-PVDF matrix are successfully produced as a consequence of this approach. The presence of Fe-O-C bonding from X-ray photoelectron spectroscopy (XPS) analysis confirms chemical interaction, while scanning electron microscopy (SEM-Energy dispersive spectroscopy EDX) imaging analysis for material homogeneity. Moreover, the SLFs of Fe3O4-MWCNT (1:2)-PVDF (20, 40, and 60 wt% for 80 mu m thickness) are newly discovered meta-nanocomposites (MNCs) properties, which are evidenced by negativeMW real complex permittivity (-274.4, -271.2, and -136.4), superior attenuation constant (12862.73, 16265.18, and 12256.34), and higher alternating current (AC)electrical conductivities (1020.8, 1174.6, and 727.7 S m(-1)). The synergistic impact of higher attenuation and AC conductivity of MNCs results in an increased average MW shielding effectiveness of approximate to 33.28 dB for Fe3O4-MWCNT (1:2)-PVDF 20 wt% MNCs (approximate to 80 mu m).