OXIDATION OF POTATO STARCH BY HYDROGEN-PEROXIDE

被引：159

作者：

PAROVUORI, P ^{[1
]}

HAMUNEN, A ^{[1
]}

FORSSELL, P ^{[1
]}

AUTIO, K ^{[1
]}

POUTANEN, K ^{[1
]}

机构：

[1] RAISIO CHEM,SF-21201 RAISIO,FINLAND

来源：

STARCH-STARKE | 1995年 / 47卷 / 01期

关键词：

D O I：

10.1002/star.19950470106

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Potato starch was oxidized by hydrogen peroxide in alkaline and acidic reaction conditions with copper, iron and tungstate catalysts in order to introduce carboxyl and carbonyl groups to the starch molecule. Carbonyl contents up to 6.6 per 100 glucose units could be obtained, whereas carboxyl content remained low (up to 1.4). Starch yields in the alkaline and acidic reactions were 90 and 99%, respectively. The molecular weight decreased markedly with the degree of oxidation, and was dependent on the catalyst used. Rheological measurements revealed that when the molecular weight of the moderately oxidized starch was high, a very firm gel (G' = 40kPa) was obtained with 25% starch concentration. When the degree of oxidation increased, the storage modulus G' decreased. The more the oxidized starch contained carbonyl groups, the higher was the gelatinization temperature.

引用

页码：19 / 23

页数：5

共 21 条

[1] MICROSTRUCTURAL AND PHYSICOCHEMICAL PROPERTIES OF OXIDIZED POTATO STARCH FOR PAPER COATING [J].