Per: mariana dias machado lopes (UENF), Alexandre Augusto Maciel Rangel Meireles (UENF), noan tonini simonassi (UENF), FELIPE PERISSE DUARTE LOPES (UENF), SERGIO NEVES MONTEIRO (UENF)
Abstract:
Composites reinforced by natural fibers have been researched and used for decades due to a series of advantageous characteristics, such as good mechanical properties, low production cost, low density, which leads to a low weight final product. In this article, a comprehensive analysis is presented on the flexural resistance of polyurethane composites reinforced with bamboo fibers in different proportions. Within the scope of this study, polyurethane composites with 60, 70, 80, and 90% bamboo fibers were produced, and their flexural strength was then evaluated through a 3-point test. The results indicated a considerable influence of the proportion of bamboo fibers used, with a substantial increase in the rupture modulus of the samples from 60% to 90% in volume of incorporated bamboo fiber, from 73,61 MPa to 142.40 MPa respectively, demonstrating a general trend of increasing strength as the fiber content increased. This research provides valuable insights for the enhancement of polyurethane composites in applications requiring high flexural strength.