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Synthesis and surface modification of cobalt nanoparticles and electromagnetic property of Co/PPy nanocomposites

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Abstract

In this work, cobalt nanoparticles were synthesized by chemical reduction procedure. After the hydrophilic functionalization, Co/polypyrrole (PPy) nanocomposites were prepared by in situ polymerization of pyrrole in aqueous dispersion of Co nanoparticles. The Co/PPy nanocomposites show good electromagnetic properties with both magnetic loss and dielectric loss to electromagnetic wave. The electromagnetic wave absorbing bandwidth (reflection loss <−10 dB) for Co/PPy (20 wt%) is above 5.5 GHz at a thickness of 2 mm, and with a maximum reflection loss (around −20.02 dB) at 14.77 GHz. This magnetic nanoparticles/conducting polymer nanocomposites are great potential candidates for electromagnetic wave absorbent, because of their wide-absorbing frequency, strong absorption, good compatibility, low density, and controllable absorbing properties.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Nos. 51101013 and 51371055), and the Fundamental Research Funds for the Central Universities (Nos. FRF-TP-12-038A and FRF-TP-14-012A2).

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Hai-Cheng Wang, Zhi-Ran Yan, Ling Deng, Hua Dong, Yi-He Jia, Ning Ma & Guang-Hua Yu

  2. Institute of Functional Materials, Central Iron & Steel Research Institute, Beijing, 100081, China

    Jun He

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  1. Hai-Cheng Wang
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  2. Zhi-Ran Yan
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  3. Ling Deng
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  4. Hua Dong
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  5. Yi-He Jia
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  7. Jun He
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  8. Guang-Hua Yu
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Correspondence to Guang-Hua Yu.

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Wang, HC., Yan, ZR., Deng, L. et al. Synthesis and surface modification of cobalt nanoparticles and electromagnetic property of Co/PPy nanocomposites. Rare Met. 34, 223–228 (2015). https://doi.org/10.1007/s12598-014-0438-5

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  • DOI: https://doi.org/10.1007/s12598-014-0438-5

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