Modification of old corrugated container pulp with laccase and laccase-mediator system.
Yangmei Chen, Jinquan Wan, Yongwen Ma, Bing Tang, Wenjia Han, Arthur J Ragauskas
College of Environmental Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510006, PR China.
Bioresource technology 2012 AprModification 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 160U/g o.d. pulp, a treatment time of 20h at 25°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. Copyright © 2012 Elsevier Ltd. All rights reserved.
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Yangmei Chen, Jinquan Wan, Yongwen Ma, Bing Tang, Wenjia Han, Arthur J Ragauskas. Modification of old corrugated container pulp with laccase and laccase-mediator system. Bioresource technology. 2012 Apr;110:297-301
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PMID: 22326330
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