Enhanced Electromagnetic Interference Shielding in a Au–MWCNT Composite Nanostructure Dispersed PVDF Thin Films

Abstract

Electromagnetic interference (EMI) shielding effectiveness and conductivities in a flexible conducting polymer composite film, prepared via a simple solvent cast method, of PVDF incorporated with Au–MWCNT are studied. The scanning electron microscopic analysis showed that the Au-loaded MWCNT uniformly dispersed in PVDF. The HRTEM images show that Au nanoparticles having a particle size of 20–30 nm have been deposited on the nodes of the MWCNT. The values of dielectric constant were found to be 12.11 and 13.89 at 1 MHz upon the incorporation of 1 and 3 wt % MWCNT in PVDF. The impedance and electromagnetic interference shielding effectiveness studies reveal that the polymer nanocomposites possess enhanced conductivity of 1.12 × 10–4 S/cm at 1 MHz, minimum return loss of 4.4 dB, and effective electromagnetic shielding of 26.7 dB at 12 GHz for 3 wt % Au NPs in 3 wt % MWCNT/PVDF thin film.

Solvothermal synthesis of three-dimensional, Fe2O3NPs-embedded CNT/N-doped graphene composites with excellent microwave absorption performance

“…This has sparked extensive studies for the development of novel high-performance microwave absorbers with the advantages of light weight, low thickness, wide absorption bandwidth, and strong absorption characteristics. 2,3 Conventional MA materials based on carbon, ceramics, and metallic magnets as well as their hybrids have been extensively used because of their good dielectric and magnetic properties, low cost, high abundance and environmental benignity. [4][5][6] In recent years, ferrite has received particularly high attention in the MA eld, and the research on this topic has become more popular.…”

Freeze-Dried Carbon Nanotube Aerogels for High-Frequency Absorber Applications

“…Internal reflection inside the CNT structure, 14,15 as well as multiple electromagnetic scattering between nanotubes in the aerogel demonstrated in the polymer matrix, 15,16 (see Figure S5), (Figure S1) or porous morphology ( Figure S2). Such structures can be formed of multiple different materials, where the resulting shape is then covered with carbon.…”

Bifunctional Hybrid Composites from Collagen Biowastes for Heterogeneous Applications

“…The SE due to reflection (SE R ) and absorption (SE A ) and the total SE (SE T ) were calculated using eqs 3–5. 53 …”