预处理对纤维素在氯化锂/N,N-二甲基乙酰胺体系中溶解行为的影响  

Influence of Pretreatment on the Dissolution Behavior of Cellulose in LiCl/DMAc System

作　　者：王红乐 傅英娟[1] 邵志勇[1] 秦梦华[1] 

机构地区：[1]齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南250353

出　　处：《纸和造纸》2014年第2期31-35,共5页Paper and Paper Making

摘　　要：采用乙二胺、N,N-二甲基乙酰胺以及加少量高锰酸钾的N,N-二甲基乙酰胺分别对纤维素进行活化预处理,发现预处理后纤维素的聚集态结构发生变化,结晶结构被部分破坏,在氯化锂/N,N-二甲基乙酰胺体系中的溶解性显著改善。在不使用任何催化剂的条件下,纤维素与酰化试剂可以在氯化锂/N,N-二甲基乙酰胺体系中进行均相反应,产物取代度高。Cellulose was pretreated using ethylenediamine, DMAc, and KMnO4/DMAc, respectively, before being dissolved in the solvent system of LiC1/DMAc. The results showed that the aggregation structure of the cellulose has been changed and its crystal structure has been partially destroyed. The solubility of the cellulose in the LiC1/DMAc system has been markedly improved. The cellulose can react with acylation reagent in the system of LiC1/DMAc without any catalyst, obtaining modified cellulose with high degree of substitution.

关 键 词：纤维素 氯化锂 N N-二甲基乙酰胺溶剂体系 预处理 均相反应 

分 类 号：TS71[轻工技术与工程—制浆造纸工程]