Influence of the hexenuronic acid content on refining and ageing in eucalyptus TCF pulp

被引：45

作者：

Cadena, Edith M. ^{[1
]}

Vidal, Teresa ^{[1
]}

Torres, Antonio L. ^{[1
]}

机构：

[1] Univ Politecn Cataluna, ETSEIAT, Text & Paper Engn Dept, E-08222 Terrassa, Spain

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 10期

关键词：

Brightness reversion; Hexenuromic acids; Laccase mediator system; Refining; eucalyptus; MEDIATOR SYSTEM DELIGNIFICATION; OXIDIZABLE STRUCTURES; PROCESS PARAMETERS; ANIONIC GROUPS; KRAFT PULPS; ECF; DEGRADATION; XYLANASE;

D O I：

10.1016/j.biortech.2009.11.105

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Brightness in totally chlorine-free (TCF) pulp is more unstable than it is in elemental chlorine-free (ECF) pulp, seemingly by effect of the former containing greater amounts of oxidizable structures such as hexenuronic acids (HexA). Accelerated ageing tests involving the application of moist heat to pulp revealed that brightness reversion can be alleviated by using an effective biotechnological method involving an enzyme-mediator treatment. Thus, the joint use of laccase from Trometes villosa and the mediator hydroxybenzotrialoze (HBT) in TCF pulp removes hexenuronic acids by 23% and reduces brightness reversion by 8.4%. Additional tests conducted to assess the effect of HexA on pulp refining revealed that these oxidizable structures introduce hydrophilicity in the pulp. Removing hexenuronic acids from TCF pulp alters its refining outcome as regards drainability (degrees SR) and water retention capacity (%WRV): also, it leads to paper with comparable strength-related properties which requires no additional refining energy. (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3554 / 3560

页数：7

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