文档介绍：
离子液体混合溶剂对毛竹的溶解和分
离研究#
周浪,常杰**
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(华南理工大学化学与化工学院,广州 510640)
摘要:采用离子液体 1-烯丙基-三甲基咪唑氯盐[AMIM]Cl 与无水乙醇和去离子水构成
混合溶剂体系,对经过苯醇抽提预处理的 40-60 目毛竹竹粉进行溶解和分离研究。采用四因
素四水平的正交实验进行工艺条件探索得出的最优化工艺条件为:反应温度 190℃,反应时
间 5h,离子液体和无水乙醇体积比为 3:7,去离子水在溶剂中质量分数为 4%。最优条件下竹
粉在混合溶剂中的溶解率可达 64%,再生木质素得率可达 66%,纤维素得率达到 81%,二
者纯度皆可达到 90%以上。通过红外光谱,核磁共振,热分析等分析测试手段对分离产品
的结构特性进行表征,结果表明再生木质素和纤维素结构并没有被破坏,分离效果较好。
关键词:离子液体;毛竹;溶解;再生
中图分类号:TQ
Dissolution and Seperation of Bamboo in Ionic Liquid
Mixture Solvent
Zhou Lang, Chang Jie
(School of Chemistry & Chemical Engineering,South China University of Technology,
Guangzhou 510640)
Abstract: In this paper,ionic liquid [AMIM]Cl was mixed with ethanol and deionized water,then
used to dissolve 40-60 mesh bamboo powder which were extracted by benzyl alcohol. Four factors and
four levels orthogonal experiment was used to explore the process conditions. The optimal conditions
were 190℃,5h,30% IL and 70% ethanol, water content 4%. Under The optimal conditions,
dissolution yield of bamboo powder can reach 64%. The purity and yield of products after separation
was calculated, regenerated lignin yield was above 66% and cellulose yield was 81%, and both of them
the purity can be up to 90%.By Fourier transform infrared FT-IR, H-NMR, thermal analysis and other
means the products was determined on their physical properties and chemical structure. It was found
that the chemical structure of lignin and cellulose did not change significantly during the separation
process.
Key words: ionic liquid; bamboo powder; dissolution; regeneration
0 引言
随着石油资源的短缺以及由于石油大量使用造成的地球变暖问题,可再生资源产业得
基金项目:教育部博士点基金(20120172110011)
作者简介:周浪(1989-),男,硕士研究生,主要研究方向:以离子液体为基础的绿色溶剂对木质纤
维素的溶解和分离研究
通信联系人:常杰(1968-),男,教授,博士生导师,主要研究方向:能源化工,生物质能源.
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到了蓬勃的发展,生物质能源作为可再生能源的一种,不仅符合自然界物质循环的“绿
色能源”,也可转化成为不同种类的生物燃料、材料及化工品,满足人类对物质、能源的需
求而且满足环境资源可持续发展[1,2]。毛竹作为重要的生物质资源也是我国种植面积最大、
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经济效益最好的竹种,在食品、化工、医药、保健、制浆造纸和新能源开发等领域的深层开