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Manufacturing and investigation of physical properties of polyacrylonitrile nanofibre composites with SiO 2 , TiO 2 and Bi 2 O 3 nanoparticles

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ABSTRACT

The aim of this study was to produce nanocomposite polymer fibres, consisting of a matrix of polyacrylonitrile (PAN) and a reinforcing phase in the form of SiO2/TiO2/Bi2O3 nanoparticles, by electrospinning the solution. The effect of the nanoparticles and the electrospinning process parameters on the morphology and physical properties of the obtained composite nanofibres was then examined. The morphology of the fibres and the dispersion of nanoparticles in their volume were examined using scanning electron microscopy (SEM). All of the physical properties, which included the band gap width, dielectric constant and refractive index, were tested and plotted against the concentration by weight of the used reinforcing phase, which was as follows: 0%, 4%, 8% and 12% for each type of nanoparticles. The width of the band gap was determined on the basis of the absorption spectra of radiation (UV–vis) and ellipsometry methods. Spectroscopic ellipsometry has been used in order to determine the dielectric constant, refractive index and the thickness of the obtained fibrous mats.

No MeSH data available.


An SEM image of the morphology of PAN/Bi2O3 particles with 12 wt % nanoparticles produced at d1 = 20 cm, with the indicated agglomerates of nanoparticles on the fibre surface, the EDX spectrum of the obtained fibres and a histogram showing the distribution of the measured diameters.
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Figure 6: An SEM image of the morphology of PAN/Bi2O3 particles with 12 wt % nanoparticles produced at d1 = 20 cm, with the indicated agglomerates of nanoparticles on the fibre surface, the EDX spectrum of the obtained fibres and a histogram showing the distribution of the measured diameters.

Mentions: The morphology of the nanocomposites fibres reinforced with 4 and 8 wt % Bi2O3 was characterised by a uniform cross section along the entire length. The morphology studies of composite PAN/Bi2O3 nanofibres and the EDX analysis showed no defects in the form of agglomerates of the strengthening phase. However, with an increase of the concentration of Bi2O3 nanoparticles in the polymer to 12 wt %, the formation of spindled beads can be seen (Fig. 6), which are structural defects of composite nanofibres, produced at a distance of 20 cm between the nozzle and the collector. The fifty-time diameter measurement showed that the diameters of the fibres are in the range from 80 to 280 nm, and the fibre diameters ranging from 140 to 160 nm and from 180 to 200 nm are the largest (40%) group of the nanofibres (histogram in Fig. 6). Defects in the form of spindled beads and of spherical shapes belong to the most common structural defects of nanofibres produced with the electrospinning method [33].


Manufacturing and investigation of physical properties of polyacrylonitrile nanofibre composites with SiO 2 , TiO 2 and Bi 2 O 3 nanoparticles
An SEM image of the morphology of PAN/Bi2O3 particles with 12 wt % nanoparticles produced at d1 = 20 cm, with the indicated agglomerates of nanoparticles on the fibre surface, the EDX spectrum of the obtained fibres and a histogram showing the distribution of the measured diameters.
© Copyright Policy - Beilstein
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4979636&req=5

Figure 6: An SEM image of the morphology of PAN/Bi2O3 particles with 12 wt % nanoparticles produced at d1 = 20 cm, with the indicated agglomerates of nanoparticles on the fibre surface, the EDX spectrum of the obtained fibres and a histogram showing the distribution of the measured diameters.
Mentions: The morphology of the nanocomposites fibres reinforced with 4 and 8 wt % Bi2O3 was characterised by a uniform cross section along the entire length. The morphology studies of composite PAN/Bi2O3 nanofibres and the EDX analysis showed no defects in the form of agglomerates of the strengthening phase. However, with an increase of the concentration of Bi2O3 nanoparticles in the polymer to 12 wt %, the formation of spindled beads can be seen (Fig. 6), which are structural defects of composite nanofibres, produced at a distance of 20 cm between the nozzle and the collector. The fifty-time diameter measurement showed that the diameters of the fibres are in the range from 80 to 280 nm, and the fibre diameters ranging from 140 to 160 nm and from 180 to 200 nm are the largest (40%) group of the nanofibres (histogram in Fig. 6). Defects in the form of spindled beads and of spherical shapes belong to the most common structural defects of nanofibres produced with the electrospinning method [33].

View Article: PubMed Central - HTML - PubMed

ABSTRACT

The aim of this study was to produce nanocomposite polymer fibres, consisting of a matrix of polyacrylonitrile (PAN) and a reinforcing phase in the form of SiO2/TiO2/Bi2O3 nanoparticles, by electrospinning the solution. The effect of the nanoparticles and the electrospinning process parameters on the morphology and physical properties of the obtained composite nanofibres was then examined. The morphology of the fibres and the dispersion of nanoparticles in their volume were examined using scanning electron microscopy (SEM). All of the physical properties, which included the band gap width, dielectric constant and refractive index, were tested and plotted against the concentration by weight of the used reinforcing phase, which was as follows: 0%, 4%, 8% and 12% for each type of nanoparticles. The width of the band gap was determined on the basis of the absorption spectra of radiation (UV–vis) and ellipsometry methods. Spectroscopic ellipsometry has been used in order to determine the dielectric constant, refractive index and the thickness of the obtained fibrous mats.

No MeSH data available.