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Homogeneous hydroxyethylation of cellulose in NaOH/urea aqueous solution
KTH, School of Biotechnology (BIO), Glycoscience.ORCID iD: 0000-0001-9832-027X
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2005 (English)In: Polymer Bulletin, ISSN 0170-0839, E-ISSN 1436-2449, Vol. 53, no 4, 243-248 p.Article in journal (Refereed) Published
Abstract [en]

The 6 wt.% NaOH/4 wt.% urea aqueous solution was proved to be an aqueous nonderivatizing solvent for cellulose by C-13 NMR. O-(2-hydroxyethyl) cellulose (HEC) was prepared by a totally homogeneous hydroxyethylation of cellulose using this new solvent for the first time, and the distribution of substituents within anhydroglucose units (AGU) was examined by C-13 NMR. It was found that the relative reactivity of the hydroxyl groups within AGU and the new hydroxyl group was in the order C-x > C-6 > C-2 > C-3, an analogous functionalization pattern as HEC obtained by the heterogeneous slurry process. The ethylene oxide efficiency in this homogeneous etherification reaction was 20 - 30%.

Place, publisher, year, edition, pages
2005. Vol. 53, no 4, 243-248 p.
Keyword [en]
c-13 nmr, substituents, derivatives, solubility, solvent
Identifiers
URN: urn:nbn:se:kth:diva-14507ISI: 000226811700003OAI: oai:DiVA.org:kth-14507DiVA: diva2:332548
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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