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中文摘要：
采用马来酸酐和邻苯二甲酸酐直接处理未经成分分离的超声预处理后的蔗渣．将羧基引入蔗渣中，考察了超声波预处理时间、反应温度、酸酐用量对羧基化产率的影响，并与经丁二酸酐处理的蔗渣进行了比较．结果表明，反应温度为90℃、超声波处理时间为30min时效果最佳．采用傅立叶变换红外光谱、交叉极似魔角旋转固体nCNMR谱和热分析法对所制备的蔗渣试样进行了表征，发现在纤维素C2和C3位置的羟基发生了酯化反应．酯化反应后，蔗渣的热稳定性降低．
英文摘要：
Maleic anhydride and phthalic anhydride were used to carboxylate unprocessed sugarcane bagasse after ultrasonic radiation, and the effects of ultrasonic radiation time, the reaction temperature and the anhydride dosage on the carboxylation yield were investigated. The yield was then compared with that of the sugarcane bagasse treated with succinic anhydride. Experimental results show that the carboxylation yield reaches the maximum with an ultrasonic radiation for 30 min at the reaction temperature of 90 ℃. Characterization results of the carboxylated sugarcane bagasse by UFIR, CP/MAS ^13CNMR spectroscopy and thermal analysis indicate that there occurs the esterification of the hydroxyl groups at C2 and C3 positions in the cellulose, and that the thermal stability of the modified sugarcane bagasse decreases due to the esterification.
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