高取代度乙酰化淀粉的制备与影响因素研究  

Preparation and Influence Factors of Acetylated Starch with High Degree of Substitution

作　　者：王志强 张卉卉 

机构地区：[1]亳州市产品质量监督检验所,安徽亳州236800 [2]亳州市黉学中学,安徽亳州236800

出　　处：《广州化工》2012年第19期79-80,144,共3页GuangZhou Chemical Industry

摘　　要：在N,N-二甲基甲酰胺(DMF)存在下,以吡啶作催化剂,将淀粉用乙酸酐进行乙酰化,制备取代度为1.8～2.9的高取代度乙酰化淀粉。研究了溶剂化时间、反应时间以及乙酸酐用量对淀粉取代程度的影响。Starch was acetylated by acetic anhydride in the presence N,N-dimethylformide（DMF）,which was used as an activator,and pyridine as a catalyst.And acetylated starch（St-Ac）with Degree of Substitution（DS）about 1.8～2.9 was obtained.The influence of solvating time,reacting time,ratios of reactants on the esterification were studied.

关 键 词：乙酰化淀粉 取代度 溶剂化 

分 类 号：TQ317[化学工程—高聚物工业] O636.9[理学—高分子化学]