Obtenção de fibras de TiO2 por eletrofiação utilizando o polímero poliestiren

Abstract

The present work reports the obtaining and characterization of TiO2 fibers by the electrospinning technique using the polystyrene polymer. The parameters of variation in the concentration of the titanium precursor and the effect of calcination on the samples obtained are studied. The fibers without calcination were investigated by thermogravimetric analysis (TGA) and scanning electron microscopy (SEM), the fibers after calcination were studied by thermogravimetric analysis (TGA), X-ray diffraction (XRD), RAMAN spectroscopy, adsorption/ N2 desorption at 77K for surface area and scanning electron microscopy (SEM). The TGA investigation showed the characteristic losses corresponding to the organic components present in the blankets before calcination, and the effect of calcination after elimination of all organic matter. The XRD of the TiO2 fibers showed the presence of mixed phases of anatase and rutile. The spectroscopy showed vibrational bands characteristic of the anatase phase and the crystallinity capacity of the calcined fibers. With the physisorption and scanning electron microscopy analyses, the TiO2 fibers showed a maximum surface area of 33 m2/g and an average diameter range in the range of 392 to 680 nm. In addition, it was verified that with the results obtained, TiO2 fibers have great potential for various applications such as photocatalysis, sensors, batteries and others.