本研究では、異種のポリマ-ポリマ複合材料をポリマナノ分散型のポリマ複合材料で実現し, その複合効果を最大限に引き出すことで, 理論弾性率に極めて近い１次元 (線状) ポリマ分散型複合材料を作製することを目的とした。具体的には, まずエレクトロスピニング法を用いて作製したセルロースアセテートの線状ナノポリマ分散材に対して, 化学処理や熱処理を施すことで, 高弾性率を有するセルロースのナノポリマ分散材を作製した。つぎに, 作製したナノポリマ分散材に対して配向性の付与や表面改質を施した後, 生分解性ポリマに複合化することで, 従来よりも理論弾性率に近い弾性率を有する環境調和型の高機能複合材料を作製した。
Polymer composites containing polymer matrix with polymeric nanofibers made of different types of polymers were fabricated. We have enhanced the elastic moduli of the new types of polymer composites primarily by considering the reinforcing effects of the nanofibers. To achieve the goal, cellulose nanofibers (C-NF) with excellent mechanical property were fabricated through the saponification of electrospun cellulose-acetate (CA) nanofibers. It was also revealed that the elastic modulus of the nanofibers could be enhanced by annealing the CA nanofibers before the saponification. Additionally, to improve the reinforcing effects of the nanofibers, the orientation and the surface modification of C-NF were carried out. Successively the C-NF were compounded into biodegradable polycaprolactone (PCL) to eventually obtain eco-friendly composites. The new composites possessed high elastic modulus closer to the theoretical value, higher than that of the composites made by the conventional methods.

研究種目 : 基盤研究 (A) (一般)
研究期間 : 2015～2018 
課題番号 : 15H02298
研究分野 : ポリマー材料・複合材料・表界面工学