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Green nanocomposites based on polylactic acid (PLA) and Wood Flour (WF) with different loadings of graphene nanoparticles (GNPs) were produced by compressing molding process. The mechanical strength, dimensional stability, and viscoelastic behavior of nanocomposites were characterized by static mechanical analysis (flexural and tensile), water uptake, and dynamic mechanical analysis (DMA) tests. Results indicated that the incorporation of GNPS into the fabricated samples, significantly improved the mechanical properties of the composites. However, the water absorption and thickness swelling of the composites progressively decreased with increasing GNPs content. In general, the specimens filled with GNPs showed the highest values of storage and loss modulus compared with the other ones, due to the highest interaction taking place at the matrix–filler interface. Morphological images show that the GNPs were homogeneously and well-dispersed in the composites. Based on the findings obtained from the present study, it can be said that the optimum content of GNPs for the fabricated WPC samples is 2%.

Physical, mechanical and viscoelastic properties of Biocomposite produced from polylactic acid (PLA) and wood flour using graphene nanoparticles