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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (03): 283-287. 上一篇    

研究简报

纤维素在离子液体[AMMor]Cl/[AMIm]Cl混合溶剂中的均相乙酰化反应研究

臧洪俊*,1，张勇1，臧亚萍2，程博闻1，宋俊1，吉科猛1，常俊强1   

  1. (1天津工业大学材料科学与化学工程学院 改性与功能纤维天津市重点实验室 天津300160)
    (2山东轻工业学院化学工程学院 济南 250353)
  • 投稿日期:2009-06-26 修回日期:2009-09-04 发布日期:2010-02-20
  • 通讯作者: 臧洪俊 E-mail:chemhong@126.com
  • 基金资助:

    天津市自然科学基金（07JCYBJC02200）

Study on the Homogeneous Acetylation of Cellulose in a Mixed Ionic Liquid of [AMMor]Cl/[AMIm]Cl

Zang Hongjun*,1 Zhang Yong1 Zang Yaping2 Cheng Bowen1 Song Jun1 Ji Kemeng1 Chang Junqiang1   

  1. (1 Tianjin Municipal Key Laboratory of Fiber Modification and Functional Fiber, Department of Material Science and Chemistry Engineering, Tianjin Polytechnic University, Tianjin 300160)
    (2 School of Chemical Engineering, Shandong Institue of Light Industry, Jinan 250353)
  • Received:2009-06-26 Revised:2009-09-04 Published:2010-02-20

PDF

2113

被引次数

23

利用混配离子液体N-烯丙基-N-甲基吗啉氯盐(N-allyl-N-methylmorpholinium chloride, [AMMor]Cl)和1-烯丙基-3-甲基咪唑氯盐(1-allyl-3-methylimidazolium chloride, [AMIm]Cl)作为溶剂, 乙酰氯为乙酰化试剂, 研究了在没有催化剂条件下的纤维素的均相乙酰化反应. 生成的醋酸纤维素(CA)的取代度由2.58到3.00. 用FT-IR, 1H NMR和13C NMR进行表征. 结果表明, [AMMor]Cl/[AMIm]Cl混配的离子液体是一种良好的均相乙酰化介质, 纤维素C-6, C-3和C-2三个位置上的羟基均发生了乙酰化反应, 且得到纯的纤维素醋酸酯. 此反应方便可控, 简单高效, 不仅降低了成本, 离子液体比较容易回收, 可以再次利用.

关键词: 纤维素, 醋酸纤维素, 离子液体, 均相乙酰化, 取代度

Homogeneous acetylation of cellulose was performed in a new mixed ionic liquid N-allyl-N- methylmorpholinium chloride ([AMMor]Cl) and 1-allyl-3-methylimidazolium chloride ([AMIm]Cl) in the absence of catalyst. The degree of substitution to cellulose acetates ranged from 2.58 to 3.00. The products were characterized by FT-IR, 1H NMR and 13C NMR spectra. The results showed that modification of cellulose with acetyl chloride using [AMMor]Cl/[AMIm]Cl as solvent resulted in the production of cellulosic monoester, and the acetylation at C-6, C-3 and C-2 positions of the cellulose all occurred. The new homogeneous path gave pure cellulose acetates. All reactions were carried out under mild conditions, low excess of reagent and a short reaction time. The reaction media applied could be easily recycled.

Key words: cellulose, cellulose acetate, ionic liquid, homogeneous acetylation, degree of substitution