APPLICATION OF THE EXPERIMENTAL DESIGN IN THE STUDY OF THE VARIABLES OF THE PROCESS OF OBTAINING NANO AND SUBMUTROMETRIC FIBERS OF TIO2 BY THE METHOD OF SOLUTION BLOW SPINNING

Reference	Presenter	Authors (Institution)	Abstract
06-111	Raquel Santos Leite	Leite, R.S.(Universidade Federal de Campina Grande); Costa, D.L.(universidade federal de campina grande); Farias, R.M.(Universidade Federal de Campina Grande); Menezes, R.R.(Universidade Federal de Campina Grande); Lira, H.L.(Universidade Federal de Campina Grande); Oliveira, S.V.(Universidade Federal de Campina Grande);	The ceramic fibers present great technological and industrial potential, due to their properties such as high surface area, chemical stability and resistance. The objective of this work was to evaluate the influence of titanium isopropoxide, gas flow pressure and injection rate on the production of nano and submicron TiO2 fibers using the solution blow spinning technique, aiming at future application in water treatment. For this, an experimental design of factorial type 2^3 was used with three experiments at the central point, totalizing 11 experiments. The regression of the experimental data was performed using Statistic software, version 7.0. The concentration of titanium isopropoxide ranged from 4 to 12%, the compressed air pressure ranged from 30 to 70 psi and the injection rate ranged from 4.4 to 10 mL/h. In the development of this work the polymer/solvent system was used: polyvinyl chloride (PVC)/tetrahydrofuran (THF). The obtained fibers were calcined at a temperature of 700 ºC and the average diameter of the fibers was determined based on analysis by scanning electron microscopy. Through the regression of the experimental data it is observed that the variable titanium isopropoxide concentration has a statistically significant influence on the diameter of the fibers produced at the level of 95% confidence, the lowest values being reached when using 12% of titanium isopropoxide. The variables, gas flow pressure and injection rate did not present a statistically significant influence on the mean diameter of the fibers produced. The pressure increase from 30 to 70 psi had an influence on the production of faulty fibers, such as beads. Fiber was produced, optimizing the production conditions, with a mean diameter value equal to 356 nm.
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