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

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

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. 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

收稿日期:2009-07-21 修回日期:2009-11-16 出版日期:2010-06-28 发布日期:2010-06-28
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)

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

CAO Yan^1,2, ZHANG Jun², HE Jiasong², LI Huiquan¹, ZHANG Yi¹

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)

摘要/Abstract

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

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

曹妍, 张军, 何嘉松, 李会泉, 张懿. Homogeneous Acetylation of Cellulose at Relatively High Concentrations in an Ionic Liquid[J]. , 2010, 18(3): 515-522.

CAO Yan, ZHANG Jun, HE Jiasong, LI Huiquan, ZHANG Yi. Homogeneous Acetylation of Cellulose at Relatively High Concentrations in an Ionic Liquid[J]. , 2010, 18(3): 515-522.

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

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

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