کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1387810 1500896 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Thiocarbamide and microwave-accelerated green methylation of cassava starch with dimethyl carbonate
چکیده انگلیسی

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 13C NMR spectroscopy. Their thermal property and crystal structure were studied by thermogravimetric analysis (TG and DTG) and powder X-ray diffractometry.

Plausible catalytic cycle for cassava starch methylation with dimethyl carbonate.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 355, 1 July 2012, Pages 87–91
نویسندگان
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