Effect of a novel enzyme on fibre morphology during ECF bleaching of oxygen delignified Eucalyptus kraft pulps

被引：53

作者：

Torres, AL

Roncero, MB

Colom, JF

Pastor, FIJ

Blanco, A

Vidal, T

机构：

[1] Tech Univ Catalonia, Dept Text & Paper Engn, ETSEI Terrassa, Terrassa 08222, Spain

[2] Univ Barcelona, Dept Microbiol, Fac Biol, E-08028 Barcelona, Spain

来源：

BIORESOURCE TECHNOLOGY | 2000年 / 74卷 / 02期

关键词：

enzyme; ECF bleaching; oxygen delignified Eucalyptus pulp; SEM;

D O I：

10.1016/S0960-8524(99)00178-9

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The use of a novel "xylanase A" enzyme was found beneficial in the elemental chlorine free (ECF) bleaching of oxygen delignified Eucalyptus kraft pulps. The application of the enzyme made possible production of fully bleached pulps with high brightness (89% ISO) and viscosities (above 800 cm(3)/g), without elemental chlorine (XD(n)EpD and D(n)EpD sequences) at low chlorine dioxide consumption. As a result of the enzyme treatment, morphological changes such as cracks, flakes, filaments and peeling of the fibre cell wall were observed by SEM (scanning electron microscopy). These modifications of the fibre surface facilitated the access to the fibre cell wall for the successive bleaching with less chemicals. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：135 / 140

页数：6

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