School of Materials Science and Engineering, Beijing University of Technology, Beijing, China.
J Agric Food Chem. 2011 May 25;59(10):5376-81. doi: 10.1021/jf104881f. Epub 2011 Apr 26.
Cellulose acetate butyrate (CAB) and cellulose acetate propionate (CAP) were prepared homogeneously in a 1-allyl-3-methylimidazolium chloride (AmimCl) ionic liquid system from sugarcane bagasse (SB). The reaction temperature, reaction time, and molar ratio of butyric (propionic) anhydride/anhydroglucose units in the cellulose affect the butyryl (B) or propionyl (P) content of CAB or CAP samples. The (13)C NMR data revealed the distribution of the substituents of CAB and CAP. The thermal stability of sugar cane bagasse cellulose was found by thermogravimetric analysis to have decreased after chemical modification. After reaction, the ionic liquid was effectively recycled and reused. This study provides a new way for high-value-added utilization of SB and realizing the objective of turning waste into wealth.
醋酸丁酸纤维素（CAB）和醋酸丙酸纤维素（CAP）是在甘蔗渣（SB）的 1-烯丙基-3-甲基咪唑氯化物（AmimCl）离子液体体系中均匀制备的。反应温度、反应时间以及纤维素中丁酸（丙酸）酐/无水葡萄糖单元的摩尔比影响 CAB 或 CAP 样品的丁酰（B）或丙酰（P）含量。13C NMR 数据揭示了 CAB 和 CAP 取代基的分布。通过热重分析发现，甘蔗渣纤维素的热稳定性在化学修饰后有所下降。反应后，离子液体可有效回收和再利用。本研究为 SB 的高附加值利用提供了一条新途径，实现了变废为宝的目标。
