Incorporação de nanopartículas de ferrita de cobalto (CoFe2O4) em resina epoxídica para a obtenção de nanocompósitos

• Autor(a) principal: Alves Júnior, Eli Silveira
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/001300000dwnp
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/6858
• topic: Nanocompósitos; Ferrita de cobalto; Resina epoxídica; Nanocomposites; Cobalt ferrite; Epoxy resin; QUIMICA ORGANICA::POLIMEROS E COLOIDES

Nanocomposites based on magnetic nanoparticles dispersed in a polymer matrix has emerged as a new class of materials that might be applied in various technology segments, such as telecommunication, aerospace and recently biomedical industry. However, obtaining nanocomposites with uniform distribution of nanoparticles in the polymeric matrix has been a challenge due to the chemical incompatibility between these materials. In this context, the objective of this study was to evaluate the homogeneity of the dispersion of cobalt ferrite (CoFe2O4) nanoparticles in an epoxy resin matrix by varying the method of incorporating them into the polymeric matrix (by adding a powder or a colloidal dispersion of nanoparticles). The prepared materials were evaluated by chemical (FTIR, AA, UV-Vis), structural (XRD), thermal (TG, DSC), morphological (DLS, SEM, TEM) and magnetic (VSM) characterization techniques. A strong correlation between the method of incorporation of the cobalt ferrite nanoparticles, the uniformity of their dispersion into the polymeric matrix and the thermal and magnetic properties of the nanocomposites was verified.