Nanofibras eletrofiadas de poli(£-caprolactona) (PCL) com polianilina (PAni): síntese, caracterização e aplicações

Abstract

This work has as main objective the development of an innovative nanotechnological material with different properties. For this purpose, polyaniline (PAni) was produced using a different method of synthesis (controlled oxidation), from which a golden color was obtained for the material at the undoped state and a blue color at the doped statewith an electrical conductivity of 6 (S / cm)). PAni was characterized by FTIR, X-Ray Diffraction (XRD) and its thermal and morphological properties were evaluated. Polymeric blends containing PAni (in 3 variations - PAni controlled oxidation, conventional PAni and PAni chitosan) were developed with Polycaprolactone (PCL). The blends were processed using the electrospinning technique. Studies were carried out with some processing parameters to produce homogeneous nanofiber mats, including the heating of the polymeric solution during electrospun. It was obtained a mat (membrane) composed of the PAni / PCL blend with homogeneous nanofiber morphology with fiber diameter around 417 ± 118 nm. The mats were thermally evaluated and resulted thermal stability (401 ° C) and the melting temperature around61 ° C. In addition, this material presented porous morphology, as observed at Scanning Electron Microscopy (SEM) analysis and also presented electrical conductivity of 0.032 ± 0.022 S / cm obtained by the 4-point method. Thus, this new nanostructured, porous, conductive and flexible material has exclusive characteristics and can be used as an intelligent material for a variety of applications at optical and electrical stimulation as sensors and optoelectronic devices.