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Increment of dielectric constant in binary composite based on PVDF/clay system

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Abstract

Binary composite films, with 10 wt% of barium doped porous clay heterostructure (Ba-PCH) in polyvinylidene difluoride, were fabricated by using mechanical mixing (Brabender) and hot pressing methods. The grain morphology of the composite films, as investigated by using the field emission scanning electron microscope, exhibits some agglomeration of Ba-PCH particles. The dielectric properties, as functions of frequency and temperature, were measured using a network analyzer. The dielectric constant of the composite film exhibits strong frequency and temperature dependence. The sharp drop of the dielectric constant is resulted, when temperature is decreased below the glass transition temperature of the polyvinylidene difluoride. The relaxation behaviors are analyzed carefully using the Arrhenius law and the other possible mechanisms and the study indicated that the dielectric behavior in these composite films is highly dominated by the electronic polarizability contributions.

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Acknowledgments

The author is thankful for the use of experimental facilities at the Polymer Processing and Polymer Nanomaterials Research Unit, Chulalongkorn University. NB would like to acknowledge his Ph.D. scholarship by the Thailand Graduate Institute of Science and Technology (TGIST). The authors would also like to acknowledge the support of the International Network for Advanced and Multifunctional Materials and National Science Foundation (INAMM/NSF) Grant #0844081.

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Authors and Affiliations

  1. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, 10330, Thailand

    Natthaphon Bunnak & Hathaikarn Manuspiya

  2. National Metal and Materials Technology Center, Klong Luang, Pathumthani, 12120, Thailand

    Pitak Laoratanakul

  3. Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX, 78249, USA

    Amar S. Bhalla

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  1. Natthaphon Bunnak
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  2. Pitak Laoratanakul
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  3. Amar S. Bhalla
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  4. Hathaikarn Manuspiya
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Correspondence to Hathaikarn Manuspiya.

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Bunnak, N., Laoratanakul, P., Bhalla, A.S. et al. Increment of dielectric constant in binary composite based on PVDF/clay system. J Mater Sci: Mater Electron 26, 7270–7276 (2015). https://doi.org/10.1007/s10854-015-3354-z

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  • DOI: https://doi.org/10.1007/s10854-015-3354-z

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