PYROLYZED CARBON BLACK APPLICATION FOR THE FORMATION OF POLYMERIC COMPOSITES WITH VEGETABLE FIBERS AND EVALUATION OF THEIR MECHANICAL PROPERTIES
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https://doi.org/10.66104/m8b61d46Palabras clave:
Aplicação Negro de Fumo Pirolisada para a Formação de Compósitos Poliméricos com Fibras Vegetais e Avaliação de suas Propriedades MecânicasResumen
Vegetable fibers have emerged as promising alternatives for the development of sustainable composite materials due to their abundance, low cost, biodegradability, and relevant mechanical properties. However, the efficiency of these materials is directly related to the quality of the fiber/matrix interface, which still represents a significant challenge in composite engineering. In this context, the present study investigates the incorporation of pyrolyzed carbon black into an isophthalic polyester resin matrix, aiming to evaluate its influence on interfacial interaction and on the mechanical properties of composites reinforced with sisal and coconut fibers. It is considered that the polarity of the constituents and the mechanisms of mechanical anchoring play a fundamental role in interfacial adhesion, directly influencing the structural performance of the material. The fibers were previously treated in an alkaline solution of sodium hydroxide (NaOH), aiming at the removal of surface impurities and modification of their morphological structure. The composites were produced with and without the addition of 1 wt% carbon black and were subsequently subjected to flexural mechanical tests. The results indicated that the incorporation of fibers promoted significant improvements in mechanical properties compared to pure resin. Additionally, the presence of carbon black contributed to an increase in the modulus of elasticity, flexural strength, and energy absorbed until fracture, especially in composites reinforced with coconut fibers. These results suggest that carbon black acts as a reinforcing agent and interfacial modifier, provided it is properly dispersed within the polymer matrix.
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Derechos de autor 2026 Renato Reis Monteiro, Celso Carlino Maria Fornari Junior
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