2025-03-112025-03-112025-02-25FERNANDES, Jennifer Ferreira. Compósitos poliméricos com fibras de açaí (Euterpe oleracea Mart.): caracterizações físicas, de resistência à chama e mecânicas. Orientador: Deibson Silva da Costa. 2025. 67 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2025. Disponível em: https://bdm.ufpa.br/handle/prefix/7821. Acesso em:.https://bdm.ufpa.br/jspui/handle/prefix/7821Açaí is the main non-timber forest product consumed in Brazil. In addition to its high nutritional value, the fruit is also used in the production of cosmetics. However, there is concern regarding the improper disposal of the seeds in rivers and streets. Thus, this study aimed to characterize the fibers from açaí seeds and incorporate them into a polymeric matrix for subsequent physical, flammability, mechanical, and fractographic analysis of the composites. The seeds were washed to remove impurities, and the fibers were manually extracted for the determination of specific mass using the pycnometer method, morphological characterization through Scanning Electron Microscopy (SEM), and the fabrication process began with an orthophthalic polyester resin matrix, a 1% (v/v) Butanox curing initiator, and açaí fibers in mass fractions of 1%, 2%, and 3%, using the hand lay-up method in a silicone mold under 47.5 N compression. The produced composites underwent physical tests for Water Absorption (WA), Apparent Porosity (AP), and Apparent Specific Mass (ASM), following ASTM D570, ASTM D2734, and ASTM D792 standards, respectively. The flammability test was conducted according to ASTM D635. Mechanical tests were performed following standardized procedures, with tensile testing in accordance with ASTM D638 and flexural testing in accordance with ASTM D790. The specific mass obtained was 1.109 g/cm³, showing results similar to those found in the literature. Regarding the analyzed fiber, an irregular, rough morphology was observed, with possible waxes and the presence of pit canals. In the physical tests of the composites, WA and AP increased after fiber insertion compared to the pure matrix, while ASM followed the rule of mixtures. In the flammability test, the composites showed results below the limits established by ASTM D635 and CONTRAN 498 standards, demonstrating satisfactory performance. In the tensile and flexural mechanical tests, the fibers acted as filler in the matrix; however, when compared to other studies, they exhibited superior results. The fractographic analysis indicated that a higher fiber fraction in the composite led to an increased number of defects. Thus, the performance of açaí fiber enables applications that contribute to economic and sustainable development, considering the characterizations and tests conducted.Acesso AbertoSustentabilidadeFibras naturaisMatriz poliméricaSustainabilityNatural fibersPolymeric matrixCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOESTrabalho de Curso - Graduação - Monografia