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Binary synergistic enhancement of dielectric and microwave absorption properties: A composite of arm symmetrical PbS dendrites and polyvinylidene fluoride

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Abstract

Arm symmetrical PbS dendrite (ASD-PbS) nanostructures can be prepared on a large scale by a solvothermal process. The ASD-PbSs exhibit a three-dimensional symmetrical structure, and each dendrite grows multiple branches on the main trunk. Such unique ASD-PbSs can be combined with polyvinylidene fluoride (PVDF) to prepare a composite material with enhanced dielectric and microwave-absorption properties. A detailed investigation of the dependence of the dielectric properties on the frequency and temperature shows that the ASD-PbS/PVDF composite has an ultrahigh dielectric constant and a low percolation threshold. The dielectric permittivity is as high as 1,548 when the concentration of the ASD-PbS filler reaches 13.79 vol.% at 102 Hz, which is 150 times larger than that of pure PVDF, while the composite is as flexible as pure PVDF. Furthermore, the maximum reflection loss can reach–36.69 dB at 16.16 GHz with a filler content of only 2 wt.%, which indicates excellent microwave absorption. The loss mechanism is also elucidated. The present work demonstrates that the addition of metal sulfide microcrystals to polymer matrix composites provides a useful method for improving the dielectric and microwave-absorption properties.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (Nos. 51472012, 51672013, 21521001, and 21431006), and the Fundamental Research Funds for the Central Universities.

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Authors and Affiliations

  1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China

    Ya-Fei Pan, Guang-Sheng Wang & Lin Guo

  2. Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, CAS Center for Excellence in Nanoscience, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China

    Lei Liu & Shu-Hong Yu

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  1. Ya-Fei Pan
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  2. Guang-Sheng Wang
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Correspondence to Guang-Sheng Wang or Shu-Hong Yu.

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12274_2016_1290_MOESM1_ESM.pdf

Binary synergistic enhancement of dielectric and microwave absorption properties: A composite of arm symmetrical PbS dendrites and polyvinylidene fluoride

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Pan, YF., Wang, GS., Liu, L. et al. Binary synergistic enhancement of dielectric and microwave absorption properties: A composite of arm symmetrical PbS dendrites and polyvinylidene fluoride. Nano Res. 10, 284–294 (2017). https://doi.org/10.1007/s12274-016-1290-8

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  • DOI: https://doi.org/10.1007/s12274-016-1290-8

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