Formation of piezoelectric β-phase crystallites in poly(vinylidene fluoride)-graphene oxide nanocomposites under uniaxial tensions

Z. Y. Jiang, Guangping Zheng, K. Zhan, Z. Han, J. H. Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

A combination of chemical addition and mechanical deformation is employed to develop a nearly pure β crystalline phase in poly(vinylidene fluoride) (PVDF). The mechanical strains for the formation of pure β phase in PVDF-graphene oxide (PVDF-GO) nanocomposites are found to be only half of that for PVDF deformed at the same temperature. Based on the creep experiments, piezoelectric force microscopy and mechanical anelastic relaxation, it is shown that the attachments of PVDF molecule chains to the GO sheets caused by the interaction between the -CF2 or -CH2 groups of PVDF and the functional groups of GOs could facilitate the formation of piezoelectric β-phase crystallites in the stretched nanocomposites. A model is proposed to elucidate the easy formation of the piezoelectric β phase in the PVDF-GO nanocomposites under uniaxial tensions.
Original languageEnglish
Article number245303
JournalJournal of Physics D: Applied Physics
Volume48
Issue number24
DOIs
Publication statusPublished - 24 Jun 2015

Keywords

  • graphene oxides
  • low-dimensional ferroelectrics
  • piezoelectric
  • poly(vinylidene fluoride)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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