纤维素在离子液体AmimCl中的均相苯甲酰化反应

酱油渣中可以提取到纤维素等生物资源，但由于纤维素不溶于水和一般溶剂，难以进行衍生化应用，因此常常遭到浪费。而离子液体对纤维素呈现出较好的溶解性，可作为纤维素衍生化的良好溶剂。本文利用提取过油脂和半纤维素的酱油渣为原料进一步提取纤维素，并对以离子液体为溶剂，无催化剂条件下纤维素的均相苯甲酰化进行了研究。重点考察了离子液体种类对均相苯甲酰化的产率和取代率的影响，反应温度、时间、苯甲酰氯与葡萄糖单元摩尔比对均相苯甲酰化的取代率的影响。研究结果发现以离子液体AminCl（1-烯丙基-3甲基咪唑氯盐）为溶剂时有最优的产率。在最优反应条件为温度80℃、时间90min、苯甲酰氯与葡萄糖单元摩尔比4：1时，可得到最高取代率0.72。

Research on synthesis of cellulose benzoates under homogeneous conditions in ionic liquid

Cellulose and so on biological resources can be extracted from soy sauce residues,because of poor solubility in regular solvent,cellulose was generally discarded.However,ionic liquids show higher solubility of cellulose,which can be used as good solvents for cellulose derivatization.In this work,soy sauce residues which has had been extracted of fatty acids and hemicelluloses was used as raw material to further extraction of cellulose,then the synthesis of cellulose benzoates by homogeneous benzoylation of cellulose with ionic liquids used as reaction medium was studied.This study focused on investigating the effects of the kinds of ionic liquids on the productivity and DS of(degree of substation) cellulose benzoates,and the effects of reaction temperature,reaction time and the mole ratio of benzoyl chloride to cellulose glucose on the DS of cellulose benzoates.It is observed that homogeneous benzoylation of cellulose in ionic liquid AmimCl has best productivity,and when reaction temperature was 80℃,reaction time was 90min and the molar ratio of benzoyl chloride to cellulose glucose unit was 4:1,had the highest DS of cellulose benzoates of 0.72.