The chemical modification of a range of starches under aqueous reaction conditions

被引：206
作者：
Fang, JM
Fowler, PA
Sayers, C
Williams, PA
机构：
[1] Univ Wales, BioComposites Ctr, Bangor LL57 2UW, Gwynedd, Wales
[2] NE Wales Inst, Ctr Water Soluble Polymers, Bangor LL11 2AW, Gwynedd, Wales
来源：
CARBOHYDRATE POLYMERS | 2004年 / 55卷 / 03期
关键词：
starch; modification; acylation;
D O I：
10.1016/j.carbpol.2003.10.003
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A series of starch esters with different side-chain lengths and moderate DS-values was prepared and studied. The esters were prepared by acylation of the gelatinised starch with the appropriate acid chloride in 2.5 M aqueous sodium hydroxide (NaOH) solution, which represents an economical and facile method for the preparation of esterified starches. The alkali solution acted as the medium for the derivatisation and ensured uniform substitution by enhancing solubility of the starch and accessibility of the reagent. Successful esterification was limited to acid chlorides containing between six and 10 carbon atoms. Shorter or longer chain-length acid chlorides did not react under these conditions to form esters, as confirmed by FT-IR spectroscopic and elemental analyses, as well as by intrinsic viscosity analysis. (C) 2003 Elsevier Ltd. All rights reserved.
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收藏
页码：283 / 289
页数：7
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