Reaction characteristics of cellulose in the LiCl/1,3‐dimethyl‐2‐imidazolidinone solvent system

被引：0
作者：
Akira Takaragi
Masahiko Minoda
Takeaki Miyamoto
Hai Qing Liu
Li Na Zhang
机构：
[1] Kyoto University,Institute for Chemical Research
来源：
Cellulose | 1999年 / 6卷
关键词：
LiCl/1; 3‐dimethy‐2‐imidazolidinone solvent system; homogeneous cellulose solution; cellulose acetate; O‐methylcellulose; reaction characteristics;
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学科分类号：
摘要：
In order to elucidate the nature of the LiCl/1,3‐dimethy‐2‐imidazolidinone (DMI) solvent system as one of the homogeneous reaction media of cellulose, cellulose acetate (CA) and O‐methylcellulose (MC) were prepared using this solvent system, and the distribution of substituents within anhydroglucose units was examined by 13C‐NMR. It was found that (i) homogeneous cellulose solutions can be easily prepared by heating 2, 5–12 and 100 parts of weight of cellulose, LiCl, and DMI, respectively, and (ii) the relative reactivity of hydroxyl groups is in the order C‐6 > C‐2 > C‐3 for both CA and MC. A remarkable feature of this solvent system is that the reaction efficiency in etherification is very high compared with other homogeneous solvent systems.
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页码：93 / 102
页数：9
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