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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...

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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
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creator	Lee, Ka I Li, Jianhua Fei, Bin Xin, John H.
description	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.
doi_str_mv	10.1016/j.polymdegradstab.2014.03.015
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source	ScienceDirect Journals
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
title	Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis
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