Research on Biological Modification of Pulp to Improve the Strength of Paper

Abstract:

Based on the domestic OCC pulp as raw material, it was found that the optimum conditions for laccase treatment were: the concentration of laccase 16U/g dry pulp, the pulp consistency 5%, temperature 50 °C, pH=5.0 and reaction time 90min. OCC treated with laccase alone can improve paper strength properties. The dry tensile index and wet tensile index of the control sample were 21.80 Nm/g and 0.22 Nm/g, respectively. The dry tensile index and wet tensile index after OCC treated with laccase alone were 23.36 Nm/g and 0.28 Nm /g. Comparing to the control pulp, the dry tensile index and wet tensile index of OCC treated with laccase were increased by 6.88% and 27.3%, respectively. At the same time, the laccase system can obviously improve the strength of the pulp properties with adding the mediator, especially using histidine, the dry and wet strength of paper was largely improved.

• Periodical: Advanced Materials Research (Volume 848)
• Pages: 334-337
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.848.334
• Online since: November 2013
• Authors: Ai Yun Long, Chuan Shan Zhao, Wen Jia Han, Yi Fei Jiang
• Keywords: Histidine (His), Laccase, OCC Pulp, Physical Properties

References

[1] Nicotra, S., Cramarossa, M.R., Mucci, A., Pagnoni, U.M., Riva, S., Forti, L., 2004b. Biotransformation of resveratrol: synthesis of trans-dehydrodimers catalyzed by laccases from Myceliophthora thermophyla and from Trametes pubescens. Tetrahedron 60, 595-600.

DOI: 10.1016/j.tet.2003.10.117

[2] Riva, S., 2006. Laccases: blue enzymes for green chemistry. Trends Biotechnol. 24(5), 219-226.

DOI: 10.1016/j.tibtech.2006.03.006

[3] Mansfield S D．Laccase impregnation during mechanical pulp processing：improved refining eficiency and sheet strength[J]．Appita，2002，55(1)．49-53.

[4] Kapoor M ，Kapoor R K，Kuhad R C．Differential and synergistic effects of xylanase and laccase mediator system(LMS)in bleaching of soda and waste pulps[J]．Journal of Applied Microbiology，2007，103(2)：305-317.

DOI: 10.1111/j.1365-2672.2006.03251.x

[5] Felby C，Hassingboe J，Lund M．Pilot—scale production of fiberboards made by laccase oxidized wood fibers：board properties and evidence for cross—linking of lignin [J]．Enzyme and Microbial Technology，2002，3 1(6)：736-741.

DOI: 10.1016/s0141-0229(02)00111-4

[6] Witayakran, S., Ragauskas, A.J., 2009. Modification of high-lignin softwood kraft pulp with laccase and amino acids. Enzyme Microb. Technol. 44, 176-181.

DOI: 10.1016/j.enzmictec.2008.10.011