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)

Abstract

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
Volume72
Issue number2
DOIs
Publication statusPublished - 18 Jan 2012

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

Cite this