The Separation, Purification and Utilization of Wood Main Components by Steam Explosion in Low Pressure (II) - Characterization and Utilization of Separated Wood Polysaccharides -

저압(低壓) 폭쇄처리(爆碎處理)에 의한 목재주성분(木材主成分)의 분리(分離)·정제(精製) 및 이용(利用) (II) - 탄수화물(炭水化物)의 화학적(化學的) 성상(性狀)및 이용(利用) -

Wood chips of oak(Quercus mongolica) and larch(Larix leptolepis) were exploded with the optimum condition. Main components of exploded wood were separated with hot hot water and methanol. The hemicelluloses were purified from hot water extracts and alditol complexs were prepared from purified hemicellulose. And also, cellulose nitrate was prepared from extractive residue and characterized. The results can be summarized as follows. 1. Amounts of carbohydrate(72~79%) in the crude hemicellulose of larch wood was more than those of oak wood(55~66%). 2. The crude hemicelluloses were mainly composed of oligosaccharides in oak wood but those in larch wood contained about 50% monosaccharides. 3. Decolorization of hemicellulose was successful with activated charcoal and ion-exchange resin treatment. The alditol yields were 56.3~82.9%. 4. The degree of substitution(D.S.) of cellulose nitrate was 1.95~2.87 and it showed a good acetone solubility.