Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

Abstract

The hybrid polymer composite (HPMC) are increasingly used in the most shielding applications in the far field region, but the main problem is these HPMC should be having a good shielding efficiency and works at high temperature. The purpose of this research study was to prepare a high stable microwave shielding hybrid polymer composite for incremental temperature implementations with surface modified MWCNTs and Fe2O3 filled contents. In this paper, the kenaf fiber, Iron (III) oxide and MWCNTs particles were surface‐treated by APTMS for effective dispersion and adhesion on epoxy matrix medium. The morphology of the obtained shields was investigated by scanning electron microscopy. Thus, additions of MWCNTs and Iron (III) oxide particles increase the magnetic permeability and electrical permittivity of epoxy polymer matrix at high temperature (25°C‐100°C‐200°C). The kenaf fibers increase the mechanical properties such as the flexural, tensile. The principal advantages of these compositions are its low cost and its higher electrical conductivity which make it a suitable material as shielding material against electromagnetic field at high temperature. For electromagnetic compatibility in the far‐field regions, the adequate SE in the frequency range of 2 to 18 GHz of the epoxy polymer matrix‐kenaf fiber conducting composites was obtained by adding the MWCNT and Fe2O3 particles.

Shielding effectiveness of multilayer laminate of aluminum metal matrix and micro absorbing materials

“…The microwave absorbing material absorbs the reflected signal once again [22] . Shielding effectiveness is a combination of absorption and reflection of electromagnetic wave through the composite material [ 23 , 24 ].

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Electromagnetic shielding behavior of epoxy multi‐hybrid composites comprises of E‐glass fiber, Ag nanoparticle, and Ni nanosheet: A novel approach

“…This uniform distribution in polymer composite is the reason due their of functional group response (NH 2 ) with matrix. [23,24] Figure 3(E) shows the EDAX report of silane surface modified EGNiAg 2 sample. The presence of nickel, nitrogen, and oxygen assure the existence of NH 2 functional group on surface modified reinforcement.…”

Numerical Macroscale Modeling of a Magnetized Ferromagnetic Fiber in Viscous Fluidic Environments

“…Among the techniques to change the fiber orientation, magnetic-field manipulation has proven to be an effective strategy. [4] In particular to achieve enhancements in the mechanical properties, [5][6][7][8][9] electrical and thermal conductivity, [10][11][12] and shielding properties of the composite [13,14] or to introduce a steering motion, [15] magnetic fields have shown to be beneficial. The effectiveness of the improvements depends on the degree of orientation that is achieved in a specific time interval.…”