BEZERRA NETA, I. A.; http://lattes.cnpq.br/4237409241499220; BEZERRA NETA, Ione Amorim.
Resumen:
Nanostructured materials based on titanium dioxide (TiO2) have great potencial for the
development of biomaterials due to their excellent physical and chemical
characteristics. Thus, the present work aims to produce nanofibrillary scaffolds of TiO2
and hybrid of poly (lactic acid) / titanium dioxide (PLA / TiO2) by solution blow
spinning that uses its regeneration of bone tissue. As TiO2 nanofibers were used in the
use of ethanol, dimethyl carbonate and titanium isopropoxide (TTIP) with a 1: 1: 0,8
volume ratio, respectively. While the hybrid nanofibers were produced with TTIP and
acetic acid in the proportion (by volume) 1.2: 1. TiO2 scaffolds was used by uniaxial
compression, using uncalcined and calcined fibers at 500, 600 and 700 ° C. As
nanofibers Hybrid cut TiO2 / PLA were placed in the oven at 60 ° C, resulting in a hybrid
scaffold consisting of TiO2 and PLA. The TiO2 scaffolds and the hybrid used were
characterized by scanning electron microscopy (MEV), X-ray diffraction (DRX), Fourier
transform infrared spectroscopy (FTIR), thermogravimetry (TGA), differential thermal
analysis (DTA) and computerized microtomography. The morphological analysis
showed that the calcined TiO2 nanofibrillary scaffolds presented a smaller number of
beads and a uniform morphology. Through the analysis of DRX and FTIR, the
formation of anatomical phases was verified at a temperature of 500 ° C and at a
temperature of rutile use of 600 ° C. While the hybrid has a band, which indicates its
predominantly amorphous behavior. As microtomographic images revealed the TiO2
scaffolds applied at 700 ° C and the hybrid showed an interconnected and highly
porous structure. While the scaffolds produced by pressing and calcination showed
porosity below 5%.
