Ultrathin structures derived from interfacially modified polymeric nanocomposites to curb electromagnetic pollution

Abstract

Electronic devices and wireless networks are increasing rapidly, and electromagnetic (EM) pollution remediation remains a challenge. We employed a unique approach to fabricating two ultrathin (approx. 53 µm) multilayered assemblies...

Multi-layered composites using polyurethane-based foams and 3D-printed structures to curb electromagnetic pollution

“…The PVDF–rGO–Fe 3 O 4 film showed an insulative nature as σ increases linearly with frequency. This is because rGO–Fe 3 O 4 is known to be semiconducting, 26 and the incorporation of rGO–Fe 3 O 4 in the insulating PVDF matrix makes the entire composite non-conducting.…”

“…SE T is defined as the logarithm of the ratio of the incident power (P I ) to the transmitted power (P T ) through the shield material. 26 SE T is expressed in units of decibels (dB).…”

“…Fe 3 O 4 decorated reduced graphene oxide (rGO) was synthesized using a solvothermal synthesis protocol mentioned in our previous work. 26 Ferric chloride hexahydrate was used as the iron source. With the help of urea and hydrazine hydrate in the ethylene glycol solvent, the salt was reduced to Fe 3 O 4 .…”

“…However, a detailed structural characterization and magnetic property study related to the rGO–Fe 3 O 4 can be found in our previous work. 26…”

“…Researchers have obtained high EMI shielding performance at low filler content using the multilayered approach than the composites prepared by common methods. 25,26 This strategy also allows tuning the absorption percentage through a rational arrangement of conductive and magnetic filler layers to construct a controllable electromagnetic gradient. [26][27][28] In contrast, porous structures enhance the shielding properties at low filler volume fraction due to filler localization in the solid portion, the air traps, and scattering at multiple interfaces.…”