Síntese e caracterização de amostras de poli (fluoreto de vinilideno) dopadas com cério

Abstract

In order to conjugate the properties of Cerium with the properties of PVDF, the following work presents the synthesis and characterization of these composites in form of films, with potential for optical applications, carrying the properties of these two types of materials. Thus, the PVDF films were prepared were prepared in order to combine the cerium properties in the Ce3+ oxidation state (cerium chloride) and the oxidation state Ce4+ (cerium sulfate). The PVDF films doped with cerium sulfate (Ce(SO4)2.4H2O) were prepared with the following concentrations 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0%. Was doped with cerium (PVDF/CeCl3.7H2O) was prepared with the same concentrations as the samples with cerium sulfate. For structural characterization, FT-IR measurements were performed which allowed to estimate relative percentage of β phase. The characterization of the electrical properties was performed by dielectric constant measurement as a function of dopant concentration and frequency and different behaviors were observed for the samples doped with cerium in the two oxidation states (Ce3+ and Ce4+). The characterization of, allowing the optical properties was performed by UV-Vis absorption measurements and the fluorescence optical spectroscopy verification of changes in these parameters caused by the addition of dopant. The experimental results showed that the PVDF matrix doped with cerium sulfate and cerium chloride are potential candidates for optical and photonic applications.