High-performance carbon nanofiber coated cellulose filter paper for electromagnetic interference shielding

Subhadip Mondal, Sayan Ganguly, Poushali Das, Poushali Bhawal, Tushar Kanti Das, Lalatendu Nayak, Dipak Khastgir, Narayan Ch Das

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

A high-performance electromagnetic interference (EMI) shielding material based on carbon nanofiber (CNF) and cellulose filter (CF) paper has been fabricated by a cost-efficient and convenient dip-coating method. The EMI shielding performance of the CF papers with micron level thickness tolerance (2.5–12.7 µm) have been explored by considering the microstructure, serviceability, electrical conductivity, and number of dip-coating cycles. Field emission scanning electron microscopy of the surface and edge of the composites support the good electrical conductivity, which showed distinct increment in electrical conductivity from 6.6 × 10−7 to 0.85 S/cm. The number of dip-coating cycles have a significant impact on electrical conductivity, and this has also been studied and inferred after alteration of dipping cycles. The electromagnetic shielding efficiency of CNF-coated CF paper exhibits 24.6 dB with only 25 dip coating cycles. Moreover, from commercially viable points of view, extensive study has been executed to investigate CNF-coated CF papers in the simulated ageing environments viz. water, thermal ageing, and thermo-degradability over a wide range of temperature (ambient to 600 °C). All the environmental factors have been simulated on a laboratory scale. The CNF-coated CF papers possess significantly higher mechanical properties than pure CF paper. This type of conductive CNF-coated CF paper is a promising candidate to be used as highly flexible, lightweight, and cost-efficient EMI shielding material in advanced multifunctional application areas.

Original languageEnglish
Pages (from-to)5117-5131
Number of pages15
JournalCellulose
Volume24
Issue number11
DOIs
StatePublished - 1 Nov 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, Springer Science+Business Media B.V.

Funding

Acknowledgments Subhadip Mondal is grateful to the Rajiv Gandhi National Fellowship, UGC for financially supporting this work sincerely.

FundersFunder number
University Grants Committee

    Keywords

    • Carbon nanofiber
    • Cellulose filter paper
    • Dip-coating method
    • EMI shielding
    • Electrical conductivity

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