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

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Abstract

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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Authors and Affiliations

  1. Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611‐0011, Japan

    Akira Takaragi, Masahiko Minoda, Takeaki Miyamoto, Hai Qing Liu & Li Na Zhang

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  1. Akira Takaragi
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  2. Masahiko Minoda
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  3. Takeaki Miyamoto
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  4. Hai Qing Liu
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  5. Li Na Zhang
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Takaragi, A., Minoda, M., Miyamoto, T. et al. Reaction characteristics of cellulose in the LiCl/1,3‐dimethyl‐2‐imidazolidinone solvent system. Cellulose 6, 93–102 (1999). https://doi.org/10.1023/A:1009208417954

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  • DOI: https://doi.org/10.1023/A:1009208417954

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