This study investigates the enhancement of poly(lactic acid) (PLA) composite films through the incorporation of cellulose, chitin, and starch, guided by comprehensive analyses using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and universal testing machine (UTM). FTIR results elucidate the interactions and structural changes within the composite matrices, showcasing distinctive peaks corresponding to specific functional groups. TGA reveals the thermal degradation behavior of PLA composites, indicating improved thermal stability with the addition of cellulose and starch. Mechanical properties, assessed through UTM, demonstrate increased tensile strength, modulus, and elongation at break in the presence of fillers. Notably, PLA/starch films exhibit superior tensile strength, highlighting the potential for tailored mechanical properties. The study’s culmination affirms that simple blending of bio-inspired additives enhances both thermal and mechanical characteristics, promising advancements in sustainable materials for diverse applications. The findings contribute valuable insights into designing PLA composites with improved performance and stability, crucial for promoting sustainable materials in various industries.

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