フローフォーカシング法におけるナノ繊維静電配向効果に関する実験解析

抄録

Cellulose Nano-fibrils (CNFs) are the fundamental building blocks extracted from wood fibers and have gained great attentions as a novel biological material. It is known that the outstanding mechanical properties of cellulose filament made of CNFs can be obtained with their orientation inside the filament. In this study, the effect of CNF pre-aligning by electric field and the flow rate ratios of the two sheath flows on the orientation of CNFs during flow focusing process are clarified with correlating to the enhancement of mechanical properties. Results clearly show that the CNF orientation can be controlled both by the flow rate ratio and the electric field with enhancing the mechanical properties of the fabricated filaments. The improvement of their ultimate tensile strength and elastic modulus can be obtained by increasing the flow rate of one of the sheath flows under the fixed total flow rate. The electric field assisted alignment effectively enhances the mechanical characteristics of the filament for any flow rate conditions.