Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate.

Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China. sxhmilyweiwei@163.com

Carbohydrate research 2012 Jul 1

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By combining the acceleration strategies of using thiocarbamide as a active catalyst, incorporating dimethyl carbonate (DMC) as a solvent and methylating reagent and applying microwave irradiation as energy resource, methylation of cassava starch can be performed efficiently to a high degree of substitution (DS=0.6) within 4 min. The structures of native cassava starch and methylated starch were characterized by (13)C NMR spectroscopy. Their thermal property and crystal structure were studied by thermogravimetric analysis (TG and DTG) and powder X-ray diffractometry. Copyright © 2012 Elsevier Ltd. All rights reserved.

Citation

Chengmin Hou, Yufang Chen, Wei Li. Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate. Carbohydrate research. 2012 Jul 1;355:87-91