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PPy/TiO2(np)/CNT polymer nanocomposite material for microwave absorption

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Abstract

PPy/TiO2(np)/CNT nanocomposites are synthesized by ‘chemical oxidative polymerization’ of pyrrole. It is observed that polypyrrole along with TiO2(np) form core shell structure. The microwave measurements such as permittivity, permeability and reflection losses (metal back) are studied at X-band. Minimum reflection loss of microwave is due to dielectric loss in the nanocomposite and is − 51.11 dB (99.99%) at 8.64 GHz for sample (PPy/TiO2(np)/CNT) of thickness 3 mm. The nanocomposite is characterized by FESEM and XRD. The particle size of the TiO2(np) is found to be ranging from 60 to 150 nm. The average crystallite size is determined by Scherrer formula and is found to be 26 nm. We have observed negative value of µ″ (complex part of permeability) for the entire frequency range (8–12 GHz). In our study we also observed the resonance–antiresonance phenomenon in all the samples. We have also seen maximum attenuation of microwave for PPy/TiO2(np)/CNT polymer nanocomposite. The synthesized nanocomposites can be used for metamaterial applications.

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Acknowledgements

The authors thank MPCST, Bhopal (Project No. A/RD/RP-2/2013-14/214) and RUSA, Jiwaji University, Gwalior for providing research grant, DMSRDE Kanpur for microwave studies and Center for Nanosciences and Nanotechnology, IIT Kanpur for characterization of the sample.

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Authors and Affiliations

  1. School of Studies in Physics, Jiwaji University, Gwalior, India

    D. C. Tiwari, Pukhrambam Dipak & Shailendra K. Dwivedi

  2. DMSRDE, Kanpur, India

    T. C. Shami

  3. Center for Nanoscience and Nanotechnology, IIT, Kanpur, India

    Prabhat Dwivedi

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  1. D. C. Tiwari
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  2. Pukhrambam Dipak
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  3. Shailendra K. Dwivedi
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  4. T. C. Shami
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Correspondence to D. C. Tiwari or Pukhrambam Dipak.

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Tiwari, D.C., Dipak, P., Dwivedi, S.K. et al. PPy/TiO2(np)/CNT polymer nanocomposite material for microwave absorption. J Mater Sci: Mater Electron 29, 1643–1650 (2018). https://doi.org/10.1007/s10854-017-8076-y

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  • DOI: https://doi.org/10.1007/s10854-017-8076-y

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