Fig. 3 shows that all Bc/PLA composites have higher Young's modulus than the neat PLA. The Young's modulus of neat PLA, 2.5 wt%, 5 wt%, 7.5 wt% and 10 wt% Bc/PLA samples are 2.9, 3.4, 3.5. 3.7 and 3.9 GPa, respectively, Due to the large surface area of BC, adding BC into PLA would improve the stress transfer properties between PLA to BC particles, Fu et al. [38] has summarized that the Young's modulus of composite can be improved by adding micro particles as rigid fillers. The resistance which created by BC particles reduced the deformability of the PLA macromolecules. Therefore, incorporation of Bc particles into pLA reduce the mobility of PLA structures and resulted in enhancing the stiffness of Bc/PLA Composite. As a result,
young's modulus increased with the content of BC particles in the composites increase [47]. The tensile strain decreased with an increase of BC content which was due to the fimited plastic deformation. In Fig. 4, neat PLA and the