Homogeneous hydroxyethylation of cellulose in NaOH/urea aqueous solution
2005 (English)In: Polymer Bulletin, ISSN 0170-0839, E-ISSN 1436-2449, Vol. 53, no 4, 243-248 p.Article in journal (Refereed) Published
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.
c-13 nmr, substituents, derivatives, solubility, solvent
IdentifiersURN: urn:nbn:se:kth:diva-14507ISI: 000226811700003OAI: oai:DiVA.org:kth-14507DiVA: diva2:332548
QC 201005252010-08-052010-08-05Bibliographically approved