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Highly efficient propionylation and butyralation of cellulose in an ionic liquid catalyzed by 4-dimethylminopyridine.
- Source :
-
Carbohydrate polymers [Carbohydr Polym] 2013 Jan 30; Vol. 92 (1), pp. 307-11. Date of Electronic Publication: 2012 Sep 19. - Publication Year :
- 2013
-
Abstract
- Using 4-dimethylaminopyridine (DMAP) as the catalyst, highly efficient propionylation and butyralation of cellulose were successfully carried out in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) under mild conditions. Cellulose propionate (CP) and cellulose butyrate (CB) with a degree of substitution (DS) in the range from 0.89 to 2.89 were synthesized within only 30 min at 30 °C. The DS values of the products could be well controlled just by molar ratio of acid anhydride/anhydroglucose unit (AGU). More interestingly, the conversions of acid anhydrides in both propionylation and butyralation were as high as above 90%, even 96%. Therefore, this work provides a facile and highly efficient way for the synthesis of cellulose esters CP and CB.<br /> (Copyright © 2012 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-1344
- Volume :
- 92
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Carbohydrate polymers
- Publication Type :
- Academic Journal
- Accession number :
- 23218299
- Full Text :
- https://doi.org/10.1016/j.carbpol.2012.08.111