Desenvolvimento e avaliação morfológica de nanofibras eletrofiadas de alginato de sódio e poli(óxido de etileno)

Abstract

Electrospinning is a polymer manipulation technique widely used to obtain materials with nanometric dimensions. Nanofibrous membranes are materials with good malleability, adjustable porosity and large surface area in relation to their volume and are therefore studied for applications in adsorption of toxic materials, controlled drug delivery, scaffolds for cell growth, and other biomedical and industrial. This work produced nanofibers of the polymers poly(ethylene oxide) (PEO) and poly(ethylene oxide) sodium alginate (AS) in concentrations between 5 and 6 % for PEO and between 2 and 4 % for AS/PEO , varying their proportions and the parameters voltage, flow and distance from the needle to the screen. The nanofibers were successfully obtained under the conditions of concentration 4%, ratio 3:1, flow rate 1.5 mL/L and voltage 12±1 kV for SA/PEO. The nanofibers were analyzed using scanning eléctron microscopy (SEM) and their morphology was analyzed and related to their composition.