Acetone-soluble cellulose acetates prepared by one-step homogeneous acetylation of cornhusk cellulose in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl)

By Yan Cao, Jin Wu, T. Meng, Jun Zhang, Jia-song He, Huiquan Li, Yi Zhang. 2007

164 citations recorded by the source corpus.

Cellulose samples extracted from cornhusk have been successfully acetylated in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl). Without using any catalyst, cornhusk cellulose acetates (CCAs) with the degree of substitution (DS) in a range from 2.16 to 2.63 were prepared in one-step. Under the homogeneous state, the DS value of CCAs was easily controlled by the acetylation time. The obtained CCAs were characterized by means of FT-IR, C-13 NMR, DSC, TGA, and a mechanical test. The NMR results showed that the distribution of the acetyl moiety among the three OH groups of the anhydroglucose unit shows a preference at the C-6 position. The CCAs exhibited good solubility in some organic solvents, such as acetone and DMSO. The cast CCA films from their acetone solutions had good mechanical properties. At the end of each acetylation of cornhusk cellulose, the ionic liquid AmimCl could be effectively recovered. Therefore, this study presents a promising approach and "green process" to make use of crop by-products. (c) 2007 Elsevier Ltd. All rights reserved.

Subfields: Biomaterials, Biomedical Engineering

View Paper: https://www.semanticscholar.org/paper/5265b48cb7cb97e3717d6d918cfc0d6183f4265b

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In Biomaterials

1. T. Heinze
2. T. Liebert
3. A. Kokorin
4. Kerstin Jedvert
5. T. Budtova

In Biomedical Engineering

1. T. Heinze
2. T. Liebert
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Citations in the corpus

• Production of biodegradable plastic from agricultural wastes (2015, methodology): “The peaks in the two CA samples can be observed at 1646, 1456 and 1223 cm (cid:2) 1 ; these are ascribed to C ‚ O and C A H bond in A O(C ‚ O) A CH 3 group, and CO A stretching of acetyl group respectively (Cao et al., 2007; Huang et al., 2011).”
• Interaction of ionic liquids with polysaccharides. 5. Solvents and reaction media for the modification of cellulose (2008, background): “It was stated that the conversion of cellulose with acetic anhydride (Ac2O) in ILs, e.g. AMIMCl, succeeds without an additional catalyst (Wu et al. 2004; Zhang et al. 2005; Cao et al. 2007).”