期刊
CHEMSUSCHEM
卷 9, 期 16, 页码 2143-2148出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600430
关键词
cellobiose; chemical grafting; degree of substitution; dimethyl carbonate; nmr
资金
- PHC-UTIQUE CMCU [13G1114]
- Institut francais de cooperation en Tunisie- IFC Tunisie, SSHN
The preparation of cellulose derivatives using green (i.e., environmentally friendly) reagents would improve sustainability and reduce concerns arising from the use of non-green reagents. The objective of this work was to prepare cellobiose carbonate using a green reagent, dimethyl carbonate. The carbonation reaction was carried out in the presence of ethanolic potassium hydroxide solution and dimethyl carbonate for 6h at a range of temperatures (25-70 degrees C). A cellobiose derivative was successfully prepared with a recovered yield of more than 70% and characterized by FTIR and NMR spectroscopy techniques. The presence of a grafted disaccharide with a degree of substitution higher than 2 was determined by (CNMR)-C-13 analysis. The spectra of the prepared cellobiose carbonate exhibited peaks that were associated with cellulose molecules (C-1-C-6) and corresponded to carbonate functions at around 159.4ppm.
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