Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (4): 18-22,29.doi: 10.3969/j.issn.1000-565X.2010.04.004

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Effects of Modification of Laccase/Mediator System on Refining Property and Fiber Morphology of Masson Pine TMP

Peng Xin-wen1  Li Xin-ping2  Zhang Su-feng2  Ren Jun-li1  Sun Run-cang1.3   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Key Laboratory of Paper Technology and Specialty Paper Development of Shaanxi,Shaanxi University of Science ＆ Technology,Xi＇an 710021,Shaanxi,China;3.Institute of Biomass Chemistry and Technology,Beijing Forestry University,Beijing 100083,China
  • Received:2009-06-24 Revised:2009-11-17 Online:2010-04-25 Published:2010-04-25
  • Contact: 任俊莉（1978-），女，讲师，主要从事植物资源化学的研究．E-mail：renjunli@scut．edu．cn E-mail:wenwenpeng1229@163．com
  • About author:彭新文（1982-），女，博士生，主要从事植物资源化学的研究．
  • Supported by:

    国家自然科学基金资助项目（30710103906）; 国家“973”计划项目（2010CB732201）; 制浆造纸工程国家重点实验室开放基金资助项目（200815）; 华南理工大学自然科学青年基金资助项目

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Abstract:

This paper deals with the refining property and fiber morphology of thermo-mechanical pulp（TMP） of masson pine modified with laccase/mediator system.The results indicate that,after the modification with laccase/mediator system,the middle lamella and even the primary wall of the fibers corrodes,the content of lignin on the fiber surface decreases,and more layer structure rich in carbohydrates are exposed to water.Thus,the water absorption of the fibers increases,the softness and swelling of the fibers improve,and the refining property improves to some extent.Moreover,it is found that the breaking length and tearing index of the paper sheet formed by the fibers with laccase modification increase by 37.30% and 47.33%,respectively,the bulk decreases by 20.33%,and the contact angle also decreases.It is thus concluded that the laccase modification is effective in improving the refining property of masson pine TMP and the strength of paper sheet.

Key words: laccase modification, masson pine, thermo-chemical pump, refining property, fiber morphology, paper sheet property