2113 ミクロフィブリル化した竹繊維の自己接着性を利用したグリーンコンポジットの最適成型条件(S23-1 新規グリーンコンポジットの開発,S23 グリーンコンポジットの最前線)

Abstract

To obtain composites with high strength in tension using bamboo microfibrillated cellulose (MFC) without any synthetic polymers as binder, the process to extract bamboo MFC and fabricating conditions were proposed. Bamboo MFC were extracted from the following five types of bamboo fiber bundles and monofilaments (pulps); (a) untreated fiber bundles (mechanically extracted from raw bamboo), (b) alkali-treated fiber bundles after mechanically extracted, (c) monofilaments obtained from steam exploded fiber bundles, (d) mono filaments from alkali-treated fiber bundles which were extracted by the steam explosion method, and (e) cellulose monofilaments chemically extracted from the monofilaments (d). These fiber bundles and monofilaments were ground at a high speed condition using stone disks to obtain the bamboo MFC. The composite was fabricated by hot pressing. The maximum bending strength of the composites was obtained at 160℃ under 120MPa when we used MFC obtained from (d) monofilaments. The maximum bending strength was 188MPa, which was about 2 times in bending strength of the composite with mono filaments (c).