Electrospinning and post-drawn processing effects on the molecular organization and mechanical properties of polyacrylonitrile (PAN) nanofibers

David A. Brennan, Khosro Shirvani, Cailyn D. Rhoads, Samuel E. Lofland, Vince Z. Beachley

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper reports the molecular organization and mechanical properties of electrospun, post-drawn polyacrylonitrile (PAN) nanofibers. Without post-drawing, the polymer chain was kinked and oriented in hexagonal crystalline structures. Immediate post-drawing in the semi-solid state disrupted the crystal structures and chain kink at maximum draw ratio. Structural re-orientation at maximum draw resulted in a 500% increase in Young's modulus and a 100% increase in ultimate tensile strength. By applying post-drawing to electrospinning it may be possible to obtain PAN fibers and PAN-derived carbon fibers with enhanced mechanical properties compared to available fabrication technologies.

Original languageEnglish (US)
Pages (from-to)764-772
Number of pages9
JournalMRS Communications
Volume9
Issue number2
DOIs
StatePublished - Jun 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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