CNF複合材料の延伸処理による微細構造変化

抄録

Cellulose nanofiber-reinforced composites have lower impact on the environment, but their poor mechanical properties are one of the major drawbacks. Therefore, we focused on the orientation control of the cellulose nanofibers in the composite matrix by applying a stretch treatment. This study examined the effect of the stretching treatment on the microstructural features and the mechanical properties of gelation PVA/cellulose nanofiber composites. The composite samples were subjected to apply larger amount of stretching strain (maximum stretching strain was 25%). The tensile strength was increased with increasing the applied stretching strain. Compared to the original sample (without stretching treatment), tensile strength of the stretched sample was increased by 180%. Consequently, it was found that larger stretching strain lead to higher strength and this increase seemed to be derived from the alignment of the cellulose nanofibers.