纤维素在咪唑基离子液体中的降解行为  

Degradation behavior of cellulose in imidazolium-based ionic liquids

作　　者：段先泉[1,2] 徐纪刚[2] 何北海[1,3] 李军荣[1] 孙玉山[2] 李晓俊[2] 

机构地区：[1]华南理工大学制浆造纸国家重点实验室,广东广州510640 [2]中国纺织科学研究院生物源纤维制造技术国家重点实验室,北京100025 [3]造纸与污染控制国家工程研究中心,广东广州510640

出　　处：《纺织学报》2012年第11期42-46,共5页Journal of Textile Research

基　　金："973"项目(2010CB735805)

摘　　要：为了解纤维素在咪唑类离子液体中的降解行为,用正交试验法分析了温度、转速、时间对纤维素降解程度的影响,比较了纤维素在4种离子液体中的降解行为,得到了纤维素在1-乙基-3-甲基咪唑醋酸盐([EMIM]Ac)中的最佳溶解条件:温度80℃,时间1 h,转速230 r/min。结果表明:温度对纤维素降解程度影响最大,其次为时间和转速;相同条件下,纤维素在[EMIM]Ac中的降解最轻,在1-烯丙基-3-甲基咪唑氯盐([AMIM]Cl)中降解最严重;没食子酸丙酯可显著缓解纤维素在离子液体中的降解程度;[EMIM]Ac、1-丁基-3-甲基咪唑醋酸盐([BMIM]Ac)遇没食子酸丙酯显紫红色,并在纤维素溶解后颜色消失。In order to study the degradation behavior of cellulose in imidazolium-based ionic liquids,the influence of temperature,time and agitation speed on degradation behavior of cellulose was studied by orthogonal experiment,and the degradation behavior of cellulose in four kinds of different ionic liquids was compared.The results showed that the optimum degradation conditions for cellulose in 1-ethyl-3-methylimidazolium acetate（Ac） were： temperature 80 ℃,dissolution time 1 hour and agitation speed 230 r/min.Dissolution temperature has the greatest influence on the cellulose degradation,followed by dissolution time and agitation speed.Under the same conditions,cellulose showed least degradation in Ac,and the most serious degradation in 1-ally-3-methylimidazolium chloride（Cl）,and on the other hand,propyl gallate could reduce the degradation of cellulose obviously in ionic liquid solutions.In the presence of propyl gallate,acetate imidazolium-based ionic liquids Ac and 1-butyl-3-methylimidazolium acetate（Ac） exhibit mauve and the color disappears after dissolution of cellulose.

关 键 词：纤维素 离子液体 降解 没食子酸丙酯 

分 类 号：TQ352.1[化学工程]