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Synthesis of Cellulose Acetates with Low Degree of Substituent and Their Water Solubility

CAO Yan1, LI Hui-Quan1*, ZHANG Yi1, ZHANG Jun2*, HE Jia-Song2   

    1. Key Laboratory of Green Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. Key Laboratory of Engineering Plastics(KLEP), Institute of Chemistry, Chinese Academy of Sciences(CAS), Beijing 100190, China
  • Received:2008-06-11 Revised:1900-01-01 Online:2008-10-10 Published:2008-10-10
  • Contact: ZHANG Jun

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Abstract: Cellulose acetates with low degree of substituent(DS) were homogeneously synthesized in an ionic liquid, 1-allyl-3-methyl-imidazolium chloride(AmimC1). Under mild reaction conditions, cellulose monoacetates(CMA) with the DS in a range from 0.34 to 1.60 were obtained. NMR analysis shows that the distribution of acetyl moieties among the three OH groups of anhydroglucose unit is C6C3>C2 for the synthesized CMA. The water solubility measurement shows that the CMA samples with the DS ranging from 0.65 to 1.06 are readily dissolved in water. The relationship between the structure and water solubility of CMA was briefly discussed.

Key words:

Cellulose acetate, Low degree of substituent, Homogeneous acetylation, Distribution of substituent, Water solubility

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