Modification of old corrugated container pulp with laccase and laccase-mediator system

被引：23
|
作者：
Chen, Yangmei [2 ,3 ,4 ,5 ]
Wan, Jinquan [2 ]
Ma, Yongwen [2 ]
Tang, Bing [3 ]
Han, Wenjia [4 ]
Ragauskas, Arthur J. [1 ,5 ]
机构：
[1] Georgia Inst Technol, Inst Paper Sci & Technol, Atlanta, GA 30332 USA
[2] S China Univ Technol, Coll Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China
[3] Guangdong Univ Technol, Coll Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China
[4] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China
[5] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 110卷
基金：
中国国家自然科学基金;
关键词：
OCC pulp; Laccase; HBT; Physical properties; Carboxyl group content; PORE STRUCTURE; KRAFT PULP; OXIDATION; FIBER;
D O I：
10.1016/j.biortech.2011.12.120
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Modification of the physical properties of old corrugated container (OCC) pulp with laccase or a laccase-mediator (ABTS, HBT, VA) system was investigated under select enzymatic concentrations and reaction times. The optimal conditions for laccase treatment shown to be using a laccase dose of 160 U/g o.d. pulp, a treatment time of 20 h at 25 degrees C, pH 7 with a pulp consistency of 5%. Results showed that the Lac-HBT treated OCC pulp gave the best strength properties, improving tensile strength by 15.7%. The increase in the carboxyl group content of OCC laccase or Lac-HBT treated pulp led to the increase in the swelling ability and bonding between fibers. Microscope images showed the fiber surface became rougher and more collapsible after Lac-HBT treatment. FT-IR data showed that new carboxylic acid groups were formed during Lac-HBT treatment. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：297 / 301
页数：5
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