文献类型：期刊文献

中文题名：超声波一步法制备纤维素氯化锂/二甲基乙酰胺溶液

英文题名：One-step Dissolution of Cellulose in Lithium Chloride/N,N-Dimethylacetamide by Ultrasonic Irradiation

作者：许玉芝[1,2,3,4] 王春鹏[1,2,3,4] 李芬芬[5] 金立维[1,2,3,4] 陈日清[1,2,3,4] 储富祥[1,2,3,4]

第一作者：许玉芝

机构：[1]中国林业科学研究院林产化学工业研究所;[2]生物质化学利用国家工程实验室;[3]国家林业局林产化学工程重点开放性实验室;[4]江苏省生物质能源与材料重点实验室;[5]南京林业大学化学工程学院

年份：2009

卷号：29

期号：5

起止页码：11-15

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家863计划资助(2007AA100704);国家林业局948引进创新项目(2006-4-C03);"十一五"国家科技支撑计划资助(2006BAD18B10)

语种：中文

中文关键词：纤维素;超声波;结构;流变性能

外文关键词：cellulose; ultrasonic wave ;strueture ; rheology

分类号：TQ351

摘要：运用超声波一步法制备了纤维素氯化锂／二甲基乙酰胺的离子溶液。通过调节超声波功率和处理时间，对纤维素、氯化锂和二甲基乙酰胺混合物超声波处理5—7min，并于室温下搅拌3～5h，即可获得纤维素均匀溶液；研究了超声波处理对纤维素分子及形态结构的影响，并对纤维素溶液的流变性能进行了考察。结果表明，超声波一步法具有工艺简单、易操作以及溶解时间短的特点，所得到的纤维素溶液具有高分子溶液的一般特征。
One-step dissolution of cellulose in lithium chloride/N, N-dimethylacetamide （LiCl/DMAc） irradiated by ultrasonic wave were studied. The effect of ultrasonic wave on the supramolecular structure of cellulose were assessed by means of FT-IR and wide-angle X-ray diffractometry, respectively. Ultrasonic irradiation exerted a clear influence on the morphological character of cellulose measured by scanning electron microscopy. The results of analysis showed that ultrasonic treatment affected the crystallization of the cellulose examied. The multiple parameters during the solvation process such as ultrasonic power, treatment time and degree of polymerization were evaluated. It was sufficient for cellulose to be solubilized in LiCl/DMAc treated for 7 min by ultrasound at 400 W, without degradation of cellulose chain during the process. A study of the theological property of the examined cellulose solution indicated that it was a non-Newtonian fluid.