O-14　イオン液体中における木材多糖の反応挙動

抄録

Reaction behaviors of cellulose and glucomannan isolated from Japanese cedar (Cryptomeria japonica) in 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]) at 120°C were investigated, aiming for elucidation of the differences in reactivity between cellulose and softwood hemicellulose. GPC and HPLC analyses indicated that the depolymerization of glucomannan and cellulose takes place via cleavage of their β-1,4-glycosidic bonds. Glucomannan was found to depolymerize than cellulose. This result is against the general idea that hemicelluloses are more readily to degrade than cellulose in various biorefinery processes. Our further investigation on the reaction behaviors of a mixture of cellulose and glucomannan suggested that glucomannan significantly retard the cellulose degradation.