The major objective of this work is focused on the preparation and characterization of poly (vinyl alcohol) (PVA) embedding tungsten oxide nanoparticles based on electrospinning technique. A surfactant (CTAB) was introduced to incorporate tungsten oxide nanoparticles into the PVA nano fi bers homogeneously. To prepare a viscous solution of PVA nano fi ber containing tungsten oxide nanoparticles, the distance be- tween the tip of the needle and the surface of the foil was chosen as 10 and 15 cm. The tungsten oxide NPs/PVA composite nano fi bers have been characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and re fl ectance spectrum in the wave length range of 200 – 1200 nm. Fiber diameters decrease with increasing of tip-to-collector distance from 10 to 15 cm. The average diameters were estimated about 165 7 30 nm and 145 7 30 nm from scanning electron micro- scopy at 10 and 15 cm, respectively. The optical properties of the electrospun nano fi bers were examined by the Kramers – Kronig model. The optical results show that tungsten oxide nanopowder show almost fi ve times higher conductivity, lower absorbance and zero band gap energy.
کلید واژگان :PVA Nanofibers Tungstenoxide Nanoparticles Electrospinning Optical properties
ارزش ریالی : 600000 ریال
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