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Effect of partial delignification of kenaf bast fibers for radiation graft copolymerization

ケナフ繊維の脱リグニンの放射線グラフト重合に対する影響

Mohamed, N. H.*; 玉田 正男; 植木 悠二; 瀬古 典明

Mohamed, N. H.*; Tamada, Masao; Ueki, Yuji; Seko, Noriaki

環境に優しい植物由来材料のケナフ繊維をグラフト重合材料の基材として利用するため、亜塩素酸による脱リグニンを検討した。亜塩素酸の濃度,処理温度,処理時間を最適化した結果、0.5%亜塩素酸中、80$$^{circ}$$C、6時間処理することでグラフト重合に適したケナフ繊維を得ることができた。この処理により、2%以下まで脱リグニンしたケナフ繊維の密度,繊維径,引っ張り強度は基材として使用可能な程度の範囲で低下したが、4-クロロメチルスチレンをグラフト重合した場合、未処理では全くグラフト重合できなかったが、処理後は143%のグラフト率を得ることができた。

Changes in residual lignin of kenaf bast fiber with acidic chlorite using various parameters were conducted to produce partial delignified fiber for radiation graft copolymerization. The effect of delignification temperature, operating time as well as chlorite doses on the residual lignin of the fibers has been reported. Results obtained indicated that the optimal delignification was achieved at 80$$^{circ}$$C for 6h with 0.5% chlorite. The reduction in density, size and tensile strength were attributed to the increase of removal of lignin from the fiber. Radiation induced emulsion graft copolymerization of 4-chloromethyl styrene (CMS) on partial delignified kenaf with residual lignin $$<$$2% resulted in higher degree of grafting of about 143% as compared to the undelignified fiber, which showed the absence of grafting degree.

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パーセンタイル:43.92

分野:Polymer Science

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