Abstract
This study examines the morphological, physicochemical, mechanical, and thermal properties of 3D-printed biocomposite fabricated using fused deposition modeling (FDM) with short Lygeum spartum fibers and PLA. Scanning electron microscopy (SEM) was used to analyze fracture surfaces and fiber dispersion within the PLA matrix after mechanical testing. Chemical and thermal properties were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Mechanical performance was assessed through tensile and flexural testing, supplemented by digital image correlation (DIC) and acoustic emission techniques. The incorporation of 10% short natural fibers mitigated the brittle behavior of 3D-printed PLA, resulting in a more ductile biocomposite. These materials exhibited improved mechanical and thermal properties, including increased flexural modulus, higher elongation at break, and enhanced thermal stability compared to neat PLA. These findings underscore the potential of these biocomposites as biodegradable and eco-friendly materials for various applications.
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