Effect of alkaline hydrolysis on cyclization reaction of PAN nanofibers

So Yeon Jin, Min Hee Kim, Young Gyu Jeong, Young Il Yoon, Won Ho Park

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

Polyacrylonitrile (PAN) nanofibers were prepared via electrospinning, and the PAN nanofibers were then subjected to alkaline hydrolysis with different treatment times. The alkaline hydrolysis behavior of the PAN nanofibers was investigated with ATR-IR and XPS analyses. The results indicate that the nitrile (C[tbnd]N) groups of PAN were converted into amide (CONH2) and carboxylic (COOH) groups. The effect of the alkaline hydrolysis on the cyclization of the PAN nanofibers was then investigated using ATR-IR, DSC, and TGA analyses. The functional groups introduced through the hydrolysis of PAN initiated the cyclization reaction at a faster rate, and thus the exothermic cyclization temperature shifted to a lower temperature. In addition, the extent of the stabilization reaction (EOS) of the hydrolyzed PAN nanofibers was higher than that of the PAN nanofibers. It was conclusively demonstrated that the alkaline hydrolysis was effective in improving the cyclization efficiency of the PAN nanofibers.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalMaterials and Design
Volume124
DOIs
StatePublished - 15 Jun 2017

Keywords

  • Alkaline hydrolysis
  • Carbon nanofiber
  • Polyacrylonitrile (PAN) nanofibers
  • Stabilization reaction

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