Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis

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

doi:10.1016/j.polymdegradstab.2014.03.015

Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis

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

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

24 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 language	English
Pages (from-to)	80-85
Number of pages	6
Journal	Polymer Degradation and Stability
Volume	105
Issue number	1
DOIs	https://doi.org/10.1016/j.polymdegradstab.2014.03.015
Publication status	Published - 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

More information

10.1016/j.polymdegradstab.2014.03.015

Cite this

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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.",

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AU - Lee, Ka I.

AU - Li, Jianhua

AU - Fei, Bin

AU - Xin, John Haozhong

PY - 2014/1/1

Y1 - 2014/1/1

N2 - 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.

AB - 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.

KW - Alkaline hydrolysis

KW - Electrospinning

KW - FTIR

KW - Heat stabilization

KW - Nanofibers

KW - Polyacrylonitrile

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DO - 10.1016/j.polymdegradstab.2014.03.015

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VL - 105

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EP - 85

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

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Mechanism study of heat stabilization of polyacrylonitrile nanofibers against alkaline hydrolysis

Abstract

Keywords

ASJC Scopus subject areas

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