Esterification and hydrolysis of cellulose using oxalic acid dihydrate in a solvent-free reaction suitable for preparation of surface-functionalised cellulose nanocrystals with high yield

A one-pot esterification and hydrolysis of cellulose was carried out by treating cellulose fibres with molten oxalic acid dihydrate. Each cellulose oxalate had a free carboxyl content above 1.2 mmol g −1 and an average molecular weight of approximately 40 kDa. Aqueous suspensions of the oxalates wer...

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Bibliographic Details
Published in:Green chemistry : an international journal and green chemistry resource : GC 2017, Vol.19 (23), p.5564-5567
Main Authors: Li, D, Henschen, J, Ek, M
Format: Article
Language:English
Subjects:
Cellulose
Cellulose esters
Cellulose fibers
Chemistry
Crystals
Esterification
Gravimetry
Green chemistry
Hydrolysis
Kemi
Molecular weight
Nanocrystals
Oxalates
Oxalic acid
Solvents
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Summary:A one-pot esterification and hydrolysis of cellulose was carried out by treating cellulose fibres with molten oxalic acid dihydrate. Each cellulose oxalate had a free carboxyl content above 1.2 mmol g −1 and an average molecular weight of approximately 40 kDa. Aqueous suspensions of the oxalates were sonicated to prepare cellulose nanocrystals with a gravimetric yield of 80.6%. A quick and simple process to prepare surface-functionalised cellulose nanocrystals.
ISSN:1463-9262
1463-9270
1463-9270
DOI:10.1039/c7gc02489d