Heat and moisture-induced yellowing of ECF-light bleached hardwood kraft pulp

被引：0

作者：

Kawae, A ^{[1
]}

Uchida, Y ^{[1
]}

机构：

[1] Oji Paper Co Ltd, Pulp & Paper Res Lab, Koto Ku, Tokyo, Japan

来源：

APPITA JOURNAL | 2005年 / 58卷 / 05期

关键词：

yellowing; brightness reversion; hexenuronic acid; 2-furancarboxylic acid; 5-formyl-2-furoic acid; bleaching; ECF; ECF-light;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

The mechanism of heat and moisture-induced yellowing of ECF-light (where chlorine dioxide was substitute By hydrogen peroxide) bleached hardwood kraft pulp (HBKP) was studied. It was found that there were at least two stages in yellowing: the first stage was more strongly affected by heat than moisture, and the second was influenced more by moisture than heat. The first stage was assumed to be the hydrolysis of hexenuronic acid (HekA) to 2-furancarboxylic acid (FA) and 5-formyl-2-furoic acid (FF). The ageing test (80 degrees C, 65% rh), where the HexA derivatives (FA, FF and metal ions) were added to hand-sheets of the HBKP, revealed that FF influenced yellowing. It showed that FF reacted with the components of pulp in the second stage.

引用

页码：378 / 381

页数：4

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