Dielectric behaviors of PHBHHx-BaTiO3multifunctional composite films

Shanming Ke, Yi Yang, Li Ren, Yingjun Wang, Yiyang Li, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


Multifunctional polymeric composites were investigated for potential use in high energy storage capacitors and tissue engineering. The polymeric composites were fabricated by employing biodegradable polyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx), as the matrix. Ferroelectric BaTiO3ceramic powders were added to the composites as fillers. The dielectric spectroscopy of the composites was measured over a wide frequency range (100-107Hz) from -100 to 60°C. The composition dependent dielectric behavior was modeled by a self-consistent effective medium theory. A percolation threshold of 0.367 was observed in the composites. The glass transition relaxation of the composite was also discussed by comparing the popular Vögel-Fulcher-Tammann law with a new glass model. The composites show attractive ferroelectricity and piezoelectricity for biomedical applications.
Original languageEnglish
Pages (from-to)370-375
Number of pages6
JournalComposites Science and Technology
Issue number2
Publication statusPublished - 18 Jan 2012


  • A. Polymer-matrix composites
  • B. Electrical properties
  • C. Dielectric spectroscopy

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Engineering


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