Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis

Ka I. Lee, Jianhua Li, Bin Fei, John Haozhong Xin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Polyacrylonitrile (PAN) nanofibers were produced by electrospinning, then heated to crosslink and stabilize their morphology. The properties of resultant nanofibers were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and solvent extraction. The FTIR spectra of heated PAN revealed three simultaneous reactions within nanofibers: dehydrogenation, cyclization, and carbonylation. Their stabilization kinetics was different from the microfibers. The gel fraction results of extraction in DMF indicated the crosslinking degree resulted from the heat treatment. The SEM observation confirmed the integrity of nanofibers after alkaline hydrolysis. These finely modified PAN nanofibers have potential applications such as superabsorbent and artificial muscles.
Original languageEnglish
Pages (from-to)80-85
Number of pages6
JournalPolymer Degradation and Stability
Volume105
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Alkaline hydrolysis
  • Electrospinning
  • FTIR
  • Heat stabilization
  • Nanofibers
  • Polyacrylonitrile

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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