Structural Characterization of Fique Fabric Reinforcing Epoxy Matrix Composites by XRD and SEM Analysis

摘要

During the last decades, an increased interest has been reported in the use of polymeric matrix composites reinforced with natural fibers for engineering applications. The advantages on the use of these materials include the replacement of synthetic fibers for natural ones, taking advantage of biodegradable resources and contribute for environment issues. This work aims to evaluate four different fractions of natural fiber reinforcing epoxy matrix composites. The natural fiber used in this investigation was the fique fiber, which due to its properties can be considered a promising candidate for composite reinforcement application. Initially, the fique fabrics were cut into 150 mm × 120 mm dimensions and dipped into a metallic mold. The fractions considered were 15, 30, 40, and 50% of a plain fabric, corresponding to 1, 2, 3, and 4 layers, respectively. The composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The X-ray diffractograms revealed characteristics peaks associated with the fique fiber. It was also showed a relationship between the degree of crystallinity and the amount of reinforcement. Finally, the SEM analysis presented the morphological aspect of the composites as well as the differences associated with the increase of reinforcement.