High-performance coils and yarns of polymeric piezoelectric nanofibers

Mahmoud Baniasadi, Jiacheng Huang, Zhe Xu, Salvador Moreno, Xi Yang, Jason Chang, Manuel Angel Quevedo-Lopez, Mohammad Naraghi, Majid Minary-Jolandan

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

We report on highly stretchable piezoelectric structures of electrospun PVDF-TrFE nanofibers. We fabricated nanofibrous PVDF-TrFE yarns via twisting their electrospun ribbons. Our results show that the twisting process not only increases the failure strain but also increases overall strength and toughness. The nanofibrous yarns achieved a remarkable energy to failure of up to 98 J/g. Through overtwisting process, we fabricated polymeric coils out of twisted yarns that stretched up to ∼740% strain. This enhancement in mechanical properties is likely induced by increased interactions between nanofibers, contributed by friction and van der Waals interactions, as well as favorable surface charge (Columbic) interactions as a result of piezoelectric effect, for which we present a theoretical model. The fabricated yarns and coils show great promise for applications in high-performance lightweight structural materials and superstretchable piezoelectric devices and flexible energy harvesting applications.

Original languageEnglish (US)
Pages (from-to)5358-5366
Number of pages9
JournalACS Applied Materials and Interfaces
Volume7
Issue number9
DOIs
StatePublished - Mar 11 2015
Externally publishedYes

Keywords

  • electrospun PVDF nanofibers
  • mechanical properties
  • multifunctional materials
  • piezoelectricity
  • stretchable materials

ASJC Scopus subject areas

  • Materials Science(all)

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