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Microwave absorption properties of polyaniline (PAni) with various amount of carbonaceous material (CM)

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Abstract

This study investigates the microwave absorption properties of polyaniline (PAni) with varying carbonaceous material, CM (Fullerene,C60) contents. PAni nanocomposites were prepared with varying contents of C60 ranging from 5 to 40% through a chemical oxidation method by using carboxylic acid as the dopant. The functional groups of PAni nanocomposites were validated by Fourier Transform Infrared Spectroscopy (FTIR) and Ultraviolet–visible (UV–Vis) Spectroscopy analyses. The surface morphology of nanocomposites and the presence of titanium dioxide (TiO2) and C60 were confirmed by Field Emission Scanning Electron Microscopy (FESEM) and X-ray Diffractometry (XRD), respectively. Microwave absorption studies were carried out using Microwave Vector Network Analyzer (MVNA) from 0.5 to 18.0 GHz. The study showed that PAni nanocomposites with 10% of C60 formed the nanorods/nanotubes with the biggest diameter of 200 nm as compared to other PAni nanocomposites. It was found that PAni nanocomposites with 10% C60 also recorded the highest electrical conductivity and relative permittivity of 1.708 × 10–1 S/cm and 9.97, respectively. The nanocomposite that was formulated with 10% of C60 showed an improvement of interchain and intrachain charge transfer as well as molecular polarization along the PAni backbone. Hence, it eventually reduces the electrical energy dissipated by PAni, and finally enhances the microwave absorption properties with the highest reflection loss (RL) of −61.3 dB at 9 GHz.

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Acknowledgments

The authors would like to acknowledge the financial support from the UMRG (RG294-14AFR), PPP Grant (PG145-2014B) and thanks the Department of Chemistry, Faculty of Science, University of Malaya, Malaysia. The authors would also like to acknowledge Mr. Masato Tadokoro from The Yokohama Rubber Co., Ltd., Japan for his assistance in the microwave absorption measurements.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Nurrafiqah Mokhtar

  2. Department of Chemistry Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia

    Pei-Yi Wong

  3. Faculty of Engineering and Information Technology, Southern University College, Jalan Selatan Utama, Off Jalan Skudai, 81300, Skudai, Johor, Malaysia

    Geok-Bee Teh

  4. Department of Physical Science, Faculty of Applied Sciences, Tunku Abdul Rahman University College, Jalan Genting Klang, 53300, Kuala Lumpur, Malaysia

    Sook-Wai Phang

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  1. Nurrafiqah Mokhtar
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Correspondence to Sook-Wai Phang.

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Mokhtar, N., Wong, PY., Teh, GB. et al. Microwave absorption properties of polyaniline (PAni) with various amount of carbonaceous material (CM). Polym. Bull. 78, 6351–6365 (2021). https://doi.org/10.1007/s00289-020-03432-9

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  • DOI: https://doi.org/10.1007/s00289-020-03432-9

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