SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (3): 515-522.

• PRODUCT ENGINEERING AND CHEMICAL TECHNOLOGY • Previous Articles     Next Articles

Homogeneous Acetylation of Cellulose at Relatively High Concentrations in an Ionic Liquid

CAO Yan1,2, ZHANG Jun2, HE Jiasong2, LI Huiquan1, ZHANG Yi1   

  1. 1. Key Laboratory of Green Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Engineering Plastics (KLEP), Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
  • Received:2009-07-21 Revised:2009-11-16 Online:2010-06-28 Published:2010-06-28
  • Supported by:
    Supported by the National Basic Research Program of China(2009CB219901)

Homogeneous Acetylation of Cellulose at Relatively High Concentrations in an Ionic Liquid

曹妍1,2, 张军2, 何嘉松2, 李会泉1, 张懿1   

  1. 1. Key Laboratory of Green Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Engineering Plastics (KLEP), Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
  • 通讯作者: ZHANG Jun,E-mail:jzhang@iccas.ac.cn;LI Huiquan,E-mail:hqli@home.ipe.ac.cn
  • 基金资助:
    Supported by the National Basic Research Program of China(2009CB219901)

Abstract: At relatively high cellulose mass concentrations(8%,10%,and 12%),homogeneous acetylation of cellulose was carried out in an ionic liquid,1-allyl-3-methylimidazolium chloride(AmimCl).Without using any catalyst,cellulose acetates(CAs)with the degree of substitution(DS)in a range from 0.4 to 3.0 were synthesized in one-step.The effects of reaction time,temperature and molar ratio of acetic anhydride/anhydroglucose unit(AGU) in cellulose on DS value of CAs were investigated.The synthesized CAs were characterized by means of FT-IR, NMR,and solubility,mechanical and thermal tests.After the acetylation,the used ionic liquid AmimCl was easily recycled and reused.This study shows the potential of the homogeneous acetylation of cellulose at relatively high concentrations in ionic liquids in future industrial applications.

Key words: cellulose, high concentration, acetylation, homogeneous, ionic liquid

摘要: At relatively high cellulose mass concentrations(8%,10%,and 12%),homogeneous acetylation of cellulose was carried out in an ionic liquid,1-allyl-3-methylimidazolium chloride(AmimCl).Without using any catalyst,cellulose acetates(CAs)with the degree of substitution(DS)in a range from 0.4 to 3.0 were synthesized in one-step.The effects of reaction time,temperature and molar ratio of acetic anhydride/anhydroglucose unit(AGU) in cellulose on DS value of CAs were investigated.The synthesized CAs were characterized by means of FT-IR, NMR,and solubility,mechanical and thermal tests.After the acetylation,the used ionic liquid AmimCl was easily recycled and reused.This study shows the potential of the homogeneous acetylation of cellulose at relatively high concentrations in ionic liquids in future industrial applications.

关键词: cellulose, high concentration, acetylation, homogeneous, ionic liquid