期刊
CELLULOSE
卷 19, 期 3, 页码 925-932出版社
SPRINGER
DOI: 10.1007/s10570-012-9687-3
关键词
3-Allyloxy-2-hydroxypropyl celluloses; NaOH/urea; Synthesis; NMR spectroscopy; Thermoreversible gelation
资金
- European Community [214653]
3-Allyloxy-2-hydroxypropylcelluloses (AHP-celluloses), reactive unsaturated cellulose derivatives, were homogeneously synthesized by the reaction of cellulose with allyl glycidyl ether (AGE) in NaOH/urea aqueous solution. Water-soluble AHP-celluloses with DSNMR = 0.32-0.67 were prepared from microcrystalline cellulose. The degree of substitution (DS) of AHP-celluloses could be controlled by varying the molar ratio of AGE and NaOH to AGU and the reaction conditions. The structure of AHP-cellulose samples were characterized by means of FT-IR, NMR spectroscopy and size exclusion chromatography. The cellulose ether shows thermoreversible flocculation. Bromination reactions were carried out as subsequent functionalization both to illustrate the reactivity of the allyl function and to determine the DS values.
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