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Electromagnetic interference shielding behavior of flexible PVA composite of tunicated onion bulb biochar/Co/carbon fiber shielding composite: effects on X and Ku band frequencies

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Abstract

This study aims to investigate the effect of adding tunicated onion bulb biochar and Co hybrid particles on PVA composites reinforced with chopped carbon fiber in EMI shielding performance. In this study, the composite films were produced by solution casting and characterized according to appropriate ASTM standards. Results revealed that the increase in particles vol.% from 1 to 5 exhibits the maximum magnetization, retentivity, and coercivity of 1144 emu, 1026 emu, and 9016 G for the composite designation PVA4 at 5 vol.% of hybrid particles. However, the 5 vol.% of hybrid particle and 30 vol.% of fiber in the composite improved the dielectric constant and loss up to 394% and 531%, when compared with pure PVA. Moreover, a maximum tensile strength of 78 MPa with a % of elongation of 84 is observed for the composite PVA3, which contains 30vol.% of fiber and 3vol.% of hybrid Co-biochar particle. Similarly, the maximum total shielding effect of − 51.3 dB is found for composite designation PVA4 at Ku band. From SEM fractography, it is noted that the presence of particles along with fiber increased the toughness and wavy microstructure. These high EMI shielding ability flexible composite materials could be used in electronic gadgets and telecommunication sectors.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Easwari Engineering College, Chennai, India

    M. Babu

  2. Department of Electronics and Communication Engineering, S.A Engineering College, Chennai, India

    B. R. Tapas Bapu

  3. Department of Embedded System, Institute of Electronics and Communication Engineering, Saveetha School of Engineering, SIMATS, Chennai, India

    R. Yuvaraj

  4. School of Computer Science and Engineering, Vellore Institute of Technology, Vellore, India

    N. Anusha

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  1. M. Babu
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  2. N. Anusha
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  3. B. R. Tapas Bapu
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  4. R. Yuvaraj
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Contributions

Babu M—conceptualization, design, research conduct.

Anusha N—conceptualization and drafting of manuscript.

Tapas Babu B R—conceptualization and drafting of manuscript.

Yuvaraj R—Drafting support.

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Correspondence to M. Babu.

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Babu, M., Anusha, N., Bapu, B.R.T. et al. Electromagnetic interference shielding behavior of flexible PVA composite of tunicated onion bulb biochar/Co/carbon fiber shielding composite: effects on X and Ku band frequencies. Biomass Conv. Bioref. 13, 409–416 (2023). https://doi.org/10.1007/s13399-022-03489-8

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  • DOI: https://doi.org/10.1007/s13399-022-03489-8

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