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Electromagnetic interference shielding behaviour of stacked aloe vera and silk fibre–reinforced high-content copper slag powder epoxy sandwich composite

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Abstract

This study explains how the addition of a metallic filler particle along with various stacking ordered electromagnetic wave–suppressing fabrics influences the total electromagnetic interference shielding effectiveness at high frequency bands. The primary objective of this study was to develop a rigid non-flexible electromagnetic interference (EMI) shielding material for use in protecting electronic devices from electromagnetic interference. The fibre and silk fabric were stacked in resin as two different forms and copper slag particles are added in it. The composites were developed using the hand layup process and they were evaluated using the American Society for Testing and Materials (ASTM) standards. The conclusion states that the fibres staked in the aloe vera/silk/silk/aloe vera (RSA) sequence were found to have higher dielectric values. A highest dielectric constant of 5.68 was noted for the RSA2 composite. Similarly, the addition of silk fabric along with copper slag as A/S/S/A format found produced a highest EMI shielding of −54.8 dB at 20-GHz frequency. Moreover, the composite designation RSA2 produced improved mechanical properties and hardness. These EMI shielding–improved mechanically toughened epoxy-based composites could be used in defence, telecommunication sector, and radar and radome applications.

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Authors and Affiliations

  1. Department of Instrument Technology, College of Engineering, Andhra University, A.P, Visakhapatnam, 530003, India

    Bonige Ramesh Babu & Bhujanga Rao

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  1. Bonige Ramesh Babu
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  2. Bhujanga Rao
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Correspondence to Bonige Ramesh Babu.

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Ramesh Babu, B., Rao, B. Electromagnetic interference shielding behaviour of stacked aloe vera and silk fibre–reinforced high-content copper slag powder epoxy sandwich composite. emergent mater. 6, 1363–1370 (2023). https://doi.org/10.1007/s42247-023-00515-x

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