Remoção de resína epóxi para reciclagem de fibra de carbono por processo oxidativo leve

Abstract

The composites have aroused great interest today, especially composites of carbon fiber, because of its versatility structural uses and characteristics, in this sense, the research practices that provide recycling of such materials are an important segment for returning a major raw material, as well as the correct closure of the life cycle of the product. Therefore this study aims to study the influence of some variables pretreatment resin removal systems epoxy by mild oxidation process under low temperature conditions, and to evaluate the resin removal efficiency in the reuse of the pretreatment solutions and treatment. To obtain the mass removal system were performed gravimetric analysis and thermogravimetric analysis to determine the content of the composite resin. Still SEM/EDS analysis complemented in obtaining the compounds obtained and their mass fractions. Evaluation of the effects by the analysis of variance revealed that the variables acetic acid concentration and temperature as well as the interaction between themselves significantly affect the removal of epoxy resin. The quadratic curve analysis showed that there is a first-order relationship between removal effectiveness and the parameters that interact with it. The response surface determined the best conditions for the concentration and temperature of the pretreatment, and 477.7 g / l acetic acid and 60 ° C, while the time had no effect on the system. The reuse of proven solutions that both can be reaproveitas on an industrial scale system because its efficiency does not change significantly for the repetitions presented.