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An Efficient and Environmentally Friendly Method for the Synthesis of Cellulose Carbamate by Microwave Heating
Author(s) -
Guo Yi,
Zhou Jinping,
Song Yongbo,
Zhang Lina
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900238
Subject(s) - cellulose , carbamate , solubility , environmentally friendly , solvent , elemental analysis , materials science , catalysis , organic chemistry , chemistry , urea , polymer chemistry , chemical engineering , ecology , engineering , biology
An efficient, solvent‐free, and catalyst‐free microwave synthesis of cellulose carbamate from a mixture of native cellulose and urea is reported. The structure of the samples are characterized by elemental analysis, FT‐IR spectroscopy, X‐ray diffraction, and NMR spectrometry. Cellulose carbamates with a nitrogen content of 0.651–2.427% are obtained by microwave heating at 255 W for 2–5 min. With the introduction of carbamate groups, the hydrogen bonding and crystalline structure of the native cellulose are partially destroyed. The products retain the cellulose I crystalline form of the native cellulose, and display good solubility in NaOH solutions.