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| The Catalytic Effect of Laccase on the Lignin Oxidation of Pulps from Different Bleaching Stages |
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| DOI：10.11980/j.issn.0254-508X.2016.08.005 |
| Key Words:carboxyl group laccase glutamic acid Kappa number |
| Fund Project:国家自然科学基金(NO.31570568)；制浆造纸工程国家重点实验室开放基金(NO.201535)；广东省高层次人才基金(NO.201339)。 |
| Author Name | Affiliation | | 刘建祥1 | 1.华南理工大学制浆造纸工程国家重点实验室,广东广州，510640 | | 马邕文1,2,* | 1.华南理工大学制浆造纸工程国家重点实验室,广东广州，510640；2.华南理工大学环境与能源学院,广东广州，510006 | | 万金泉1,2 | 1.华南理工大学制浆造纸工程国家重点实验室,广东广州，510640；2.华南理工大学环境与能源学院,广东广州，510006 | | 余仕发3 | 3.福建省晋江优兰发纸业有限公司,福建晋江，362221 | | 陈长兴3 | 3.福建省晋江优兰发纸业有限公司,福建晋江，362221 | | 张国瑞4 | 4.福建希源纸业有限公司,福建龙海，363107 | | 陈德强4 | 4.福建希源纸业有限公司,福建龙海，363107 |
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| Abstract:This study explored laccase-glutamic acid system catalytic effects on unbleached eucalyptus kraft pulp (Sp), oxygen delignified eucalyptus kraft pulp (O), and H2O2 bleached eucalyptus pulp (P). The results showed that the Kappa numbers of the pulps increased and whiteness decreased with laccase catalysis. Laccase catalysis oxidation of lignin on the surfaces combining the treatment of glutamic acid, free radical coupling reaction between the lignins on the surfaces of adjacent fibers formed a network structure and created closer contact between the fibers, the paper strength was enhanced significantly. The carboxyl groups of the pulps increased 20% for (Sp), 50% for (O) and 43% for (P) after combining laccase acid and glutamic acid treatment. |
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