EFFECTS OF XYLANASE PRETREATMENT ON THE BLEACHING PROPERTIES OF WHEAT STRAW PULP

被引：0

作者：

Mao, Lian-Shan ^{[1
]}

You, Ji-Xue ^{[1
]}

Yu, Shi-Yuan ^{[1
]}

Law, Kwei-Nam ^{[2
]}

机构：

[1] Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210037, Peoples R China

[2] Univ Quebec Trois Rivieres, Ctr Integre Pates & Papiers, Trois Rivieres, PQ G9A 5H7, Canada

来源：

CELLULOSE CHEMISTRY AND TECHNOLOGY | 2007年 / 41卷 / 7-8期

关键词：

endo-xylanase; xylosidase; biobleaching; wheat straw pulp;

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：

This work examines the effects of endo-xylanase and xylosidase pretreatments on the bleaching characteristics of wheat straw pulp. The results show that the brightness of bleached pulp pretreated with endo-xylanase and xylosidase increased by 4.0% and 3.4%, respectively, and that, at a chlorine dosage of 5% (on pulp), the strength of bleached pulps was higher than that of the control. When used together, endo-xylanase and xylosidase act synergistically in the pretreatment of wheat straw pulp prior to bleaching. The brightness of the bleached pulp pretreated with a mixture of endo-xylanase and xylosidase increased respectively by 0.6% and 1.2% greater than that with endo-xylanase and xylosidase solely. However, the bleached Pulp Strength was inferior to that obtained by either endo-xylanase or xylosidase pretreatment. Electron microscopy revealed that the enzymatic pretreatments produced more numerous and larger pores on the surfaces and cross sections of fibers than those existing in untreated pulp.

引用

页码：405 / 411

页数：7

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