高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (11): 2663.

• 研究论文 • 上一篇    下一篇

松木屑在AmimCl离子液体中的原位均相乙酰化

曹妍,王学静,李会泉   

  1. 中国科学院过程工程研究所, 湿法冶金与清洁生产技术国家工程实验室, 北京 100190
  • 收稿日期:2011-05-04 修回日期:2011-09-22 出版日期:2011-11-10 发布日期:2011-10-14
  • 通讯作者: 李会泉 E-mail:hqli@home.ipe.ac.cn
  • 基金资助:

    国家自然科学基金(批准号: 21006118)和国家“九七三”计划项目(批准号: 2009CB219901)资助.

In-situ Acetylation of Pine Wood Chip in 1-Allyl-3-methylimidazolium Chloride(AmimCl) Ionic Liquid

CAO Yan, WANG Xue-Jing, LI Hui-Quan*   

  1. Key Laboratory of Green Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2011-05-04 Revised:2011-09-22 Online:2011-11-10 Published:2011-10-14
  • Contact: LI Hui-Quan E-mail:hqli@home.ipe.ac.cn
  • Supported by:

    国家自然科学基金(批准号: 21006118)和国家“九七三”计划项目(批准号: 2009CB219901)资助.

摘要: 不使用任何催化剂, 在离子液体1-烯丙基-3-甲基咪唑氯盐(AmimCl)中实现了松木屑的一步均相乙酰化, 乙酰化松木的质量增重(WPG)范围在-89%~156%之间. 研究表明, 在均相条件下, 可以通过控制乙酰化时间, 乙酰化温度及乙酸酐/OH的摩尔比来控制乙酰化松木的WPG值. 用FTIR, 13C NMR, TGA 和 SEM对乙酰化松木进行表征. 结果表明, 13C NMR和FTIR谱图有明显的乙酰基特征峰, 且乙酰化松木的结构均匀致密, 其热稳定性高达205 ℃, 略低于原生松木.

关键词: 松木屑, 离子液体, 均相乙酰化

Abstract: Pine wood chips were successfully acetylated in an ionic liquid 1-allyl-3-methylimidazolium chloride(AmimCl). Without any catalyst, acetylated pine with the weight percentage gain(WPG) in the range of -89% to 156% could be prepared in one\|step. Under the homogeneous state, the WPG of acetylated pine can be easily controlled by the acetylation time, temperature and molar ratio of Ac2O/OH. The obtained acetylated pine was characterized by means of FTIR, 13C NMR, TGA and SEM. The NMR and FTIR results show obvious peaks for the acetylation; the TGA result shows that the thermal stability of acetylated wood can reach as high as 205 ℃, which is a bit lower than the original pine; the SEM result shows that the acetylated pine has a dense and homogeneous structure. Therefore, this study presents a promising approach and green process for in-situ wood chip acetylation efficiently.

Key words: Pine wood chip, Ionic liquid, Homogeneous acetylation

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