Rapid and environmentally friendly preparation of starch esters

被引：100

作者：

Biswas, Atanu ^{[1
]}

Shogren, R. L. ^{[1
]}

Selling, Gordon ^{[1
]}

Salch, J. ^{[1
]}

Willett, J. L. ^{[1
]}

Buchanan, Charles M. ^{[2
]}

机构：

[1] USDA ARS, Natl Ctr Agr Utilizat Res, Plant Polymer Res Unit, Peoria, IL 61604 USA

[2] Eastman Chem Co, Res Labs, Kingsport, TN 37662 USA

来源：

CARBOHYDRATE POLYMERS | 2008年 / 74卷 / 01期

关键词：

starch iodine; acetic anhydride; starch acetate; microwave; synthesis;

D O I：

10.1016/j.carbpol.2008.01.013

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effects of microwave heating and reactant composition on the iodine-catalyzed acetylation of starch by acetic anhydride were investigated. After only 2 min at 100 degrees C, significant amounts of acetylation occurred using small amounts of iodine (0.16-2.5 mol%). Values of degree of substitution (DS) increased as iodine/starch and acetic anhydride/starch ratios increased. Starch acetates having DS of up to 3 were prepared using 2.5 mol% iodine. Molecular weights decreased as iodine levels increased. This method of starch acetylation is attractive since no solvent is needed, reaction is rapid, energy inputs are relatively small, and the catalyst has low toxicity. Published by Elsevier Ltd.

引用

页码：137 / 141

页数：5

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