中文摘要：

目前工业上多采用非均相法生产纤维素衍生物，但非均相法存在试剂用量大、流程长、反应难以控制和产物不均匀等缺点．近年来，纤维素的均相衍生化反应已引起人们越来越多的重视，这是因为均相法有可能克服非均相法存在的上述缺点．此外，均相法在制备结构新颖的纤维素衍生物方面具有独特优势．

英文摘要：

Homogeneous acetylation of cellulose in 1-allyl-3-methyl-imidazolium chloride （AMIMC1） was cartied out. Acetic anhydride and acetyl chloride were used as acetylating agents in the absence and presence of pyridine. The degree of substitution（DS） of the products and the distribution of substituents were determined by titration and ^13C NMR techniques respectively. It was observed that acetyl chloride reacted faster than anhydride, Further, pyridine accelerated the reactions when anhydride was used as the acetylating agent, while it slowed down the reactions when acetyl chloride was used. An interesting distribution of DSC-2〉〉 DSC-3 for substitutes was observed in the product with acetic anhydride/pyridine system.