| 초록 |
Cello-oligosaccharide obtained by hydrolysis of cellulose is an attractive green intermediate from which high value-added substances can be obtained. However, cellulose has numerous hydrogen bonds due to hydroxyl groups between monomers, resulting its high crystallinity and low solubility. Therefore, the hydrolysis of cellulose is so limited. Severe pretreatment conditions such as sulfuric acid (conc. 97%) and ball milling (300~600 rpm) were applied to break the hydrogen bonds of cellulose, but these methods have clear limitations in terms of cost and time. In this study, ionic liquid is used to convert raw cellulose to ionic cellulose, thereby disrupting its high hydrogen bonding. We demonstrate that crystallinity reduction similar to ball milling pretreatment can be achieved only with ionic liquid pretreatment, and high hydrolysis conversion of ~90% is possible using a sulfonic acid-functionalized carbon catalyst. |
