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Facile Preparation of Lightweight and Flexible PVA/PEDOT:PSS/MWCNT Ternary Composite for High-Performance EMI Shielding in the X-Band Through Absorption Mechanism

  • Progress and Challenges in Developing Electromagnetic Interference Materials
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Abstract

Electromagnetic safeguards are key factors for electronic devices. Lightweight and highly flexible polymer composite films with high electrical conductivity are considered to be efficient electromagnetic interference (EMI) shielding materials. Polymer composites offer alternative to metal-based composites which have poor flexibility, corrodibility, and are difficult to process. Here, highly flexible polyvinyl alcohol/poly (3, 4-ethylenedioxythiophene):polystyrene sulfonate/multiwalled carbon nanotube (PVA/PEDOT:PSS/MWCNT) free-standing composite films were fabricated by a solution mixing process followed by a simple solvent casting technique. PVA/PEDOT:PSS/MWCNT composite films of thickness around 20 microns showed high EMI shielding effectiveness (SE) in the X-band over the frequency range of 8–12 GHz. Incorporation of MWCNT into the polymer matrix considerably increased the mechanical strength of the PVA/PEDOT:PSS/MWCNT composite free-standing film. This investigation revealed that PVA/PEDOT:PSS/MWCNT composite film with 0.5 wt.% of MWCNT showed excellent absorption-dominated EMI SE of 60 dB over the frequency range of 8–12 GHz with extensive tensile strength. Our study opens a facile way to design flexible, lightweight and free-standing films as EMI shielding for next-generation flexible electronic devices.

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Acknowledgments

This work is supported by Kerala State Council for Science, Technology and Environment (286/2014/KSCSTE), Govt. of Kerala. One of the authors (Jasna) is grateful to UGC for awarding BSRRFSMS fellowship. The authors wish to express their appreciation to Dr. Honey John, Department of Polymer Science and Rubber Technology, CUSAT, for the UTM measurement. The authors acknowledge the financial support extended by DST-FIST scheme, Government of India, for acquiring the FE-SEM facility.

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Authors and Affiliations

  1. Department of Physics, Cochin University of Science and Technology, Kochi, Kerala, 682 022, India

    M. Jasna, M. Manoj & M. K. Jayaraj

  2. Department of Electronics, Cochin University of Science and Technology, Kochi, Kerala, 682 022, India

    Neeraj K. Pushkaran & C. K. Aanandan

  3. Centre of Excellence in Advanced Materials, Cochin University of Science and Technology, Kochi, Kerala, 682 022, India

    C. K. Aanandan & M. K. Jayaraj

  4. Inter University Centre for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi, Kerala, 682 022, India

    C. K. Aanandan & M. K. Jayaraj

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  1. M. Jasna
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  2. Neeraj K. Pushkaran
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  3. M. Manoj
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  4. C. K. Aanandan
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Correspondence to M. K. Jayaraj.

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Jasna, M., Pushkaran, N.K., Manoj, M. et al. Facile Preparation of Lightweight and Flexible PVA/PEDOT:PSS/MWCNT Ternary Composite for High-Performance EMI Shielding in the X-Band Through Absorption Mechanism. J. Electron. Mater. 49, 1689–1701 (2020). https://doi.org/10.1007/s11664-019-07676-8

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