DECOLORATION OF NATURAL COLORING MATTER WITH SODIUM PERCARBONATE

被引：16

作者：

OHURA, R

KATAYAMA, A

TAKAGISHI, T

机构：

[1] KYOTO WOMENS UNIV,DEPT CLOTHING SCI,HIGASHIYAMA KU,KYOTO 605,JAPAN

[2] UNIV OSAKA PREFECTURE,DEPT APPL CHEM,SAKAI,OSAKA 591,JAPAN

来源：

TEXTILE RESEARCH JOURNAL | 1991年 / 61卷 / 04期

关键词：

D O I：

10.1177/004051759106100410

中图分类号：

TB3 [工程材料学]; TS1 [纺织工业、染整工业];

学科分类号：

0805 ; 080502 ; 0821 ;

摘要：

We have investigated the initial rate of decoloration of some natural colorants by sodium percarbonate in solution and the influence of pH and temperature on the decoloration reaction. The natural colorants were flavonol, chrysin, carthamin, carminic acid, and shikonin. Orange II (CI acid orange 7), a typical synthetic azo dye, was used for comparison. The maximum rate constant was in the neighborhood of pH 11.5 for all cases, and increased in the following order: flavonol < chrysin < carthamin < orange II < carminic acid < shikonin. The decoloration rate increased as the temperature rose. The apparent activation energy of the decoloration reaction seemed to decrease in the order above.

引用

页码：242 / 246

页数：5