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Carbonized Charcoal‐Loaded PVDF Polymer Composite: A Promising EMI Shielding Material

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Abstract

Microcomposites of charcoal‐loaded polyvinylidene fluoride (PVDF) polymer have been prepared by solution mixing and hot compression method for electromagnetic interference (EMI) shielding applications. Electrical conductivity, dielectric properties and EMI shielding efficiency of these composites have been studied in the X-band (8.2–12.4 GHz) frequency region. An increase in the conductivity from ~ 1.47 × 10−14 S/cm for pure PVDF to 23.2 S/cm for 80 wt.% charcoal‐loaded PVDF composite is obtained with improved mechanical strength. High effective dielectric constant \( ( \in^{'} ) \) value of 116.06 and dielectric loss \( ( \in^{{\prime \prime }} ) \) of 233.59 are obtained at a frequency of 8.2 GHz. A high value of total shielding (SET), shielding due to absorption (SEA) and shielding due to reflection (SER) are measured to be 70.1 dB, 59.3 dB and 9.2 dB, respectively, for 80 wt.% charcoal‐incorporated PVDF polymer composite, respectively. Dispersion studies suggest that SET of the charcoal‐loaded PVDF polymer composite is independent of frequency and is mainly absorption dominant which makes it a suitable material for EMI shielding applications.

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Acknowledgements

The authors are grateful to Department of Science and Technology (DST), Government of India, for financial support, and thankful to Prof. R. Nagrajan, Department of Chemistry, University of Delhi, for providing TGA facility.

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Authors and Affiliations

  1. Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India

    Krishna Kamal Halder, V. K. Sachdev & Vinay Gupta

  2. Kirori Mal College, University of Delhi, Delhi, 110007, India

    Krishna Kamal Halder

  3. Miranda House, University of Delhi, Delhi, 110007, India

    Monika Tomar

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  1. Krishna Kamal Halder
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Correspondence to Vinay Gupta.

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Halder, K.K., Tomar, M., Sachdev, V.K. et al. Carbonized Charcoal‐Loaded PVDF Polymer Composite: A Promising EMI Shielding Material. Arab J Sci Eng 45, 465–474 (2020). https://doi.org/10.1007/s13369-019-04054-8

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  • DOI: https://doi.org/10.1007/s13369-019-04054-8

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