Produção de biocompósitos a partir de matriz polibenzoxazínica derivada do LCC reforçada com fibras de bambu

Abstract

This work presents the synthesis of a biocomposite from a polybenzoxazinic matrix derived from CNSL reinforced with bamboo fibers. The cardanol was isolated from the technical CNSL by liquid/liquid extraction and characterized by CG/MS, (1H and 13C) NMR, and FTIR, showing a great yield of 62% (±5.0), and a high purity (95.7%). Then, a benzoxazine was produced from cardanol as phenolic compound, aniline as primary amine and paraformaldehyde through the solvent free method. The structural characterization of the monomer was performed by FT-IR, 1H e 13C NMR, while the thermoanalytical study of the monomer and the polymer by (DSC, TGA, DMA). The synthesis of the biocomposite with bomboo fibers did not show satisfying results given that its production involving high temperatures led to failures in the biocomposite structure. However, with the use of a catalyst (DETA) at a concentration of 5% it was possible to synthesize of biocomposite using bamboo fibers, in the concentration of 5 and 10%, obtaining a material free of structural defects, with high degree of crosslinking (94.15 ;94.3%) and high hardness (660 MPa; 805 MPa ).