Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis

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 (FT...

Full description

Saved in:
Bibliographic Details
Published in:Polymer degradation and stability 2014-07, Vol.105, p.80-85
Main Authors: Lee, Ka I, Li, Jianhua, Fei, Bin, Xin, John H.
Format: Article
Language:English
Subjects:
Alkaline hydrolysis
Applied sciences
Crosslinking
Electrospinning
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
Fourier transforms
FTIR
Heat stabilization
Infrared spectroscopy
Nanofibers
Polyacrylonitrile
Polyacrylonitriles
Polymer industry, paints, wood
Scanning electron microscopy
Solvent extraction
Stabilization
Technology of polymers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2014.03.015