Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (11): 100-104.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Effect of Moditication by Laccase/Mediator System on Structure of Lignin from Stone Ground Wood Pulp

Zhang Ai-ping1  Qin Meng-hua2  Xu Qing-hua2  Sun Run-cang1  Liu Chuan-fu1   

  1. 1. State Key Laboratory of Pulp and Paper Engineering , South China Univ. of Tech. , Guangzhou 510640 ， Guangdong , China;2. Shandong Key Laboratory of Pulp and Paper Engineering, Shandong Institute of Light Industy，Jinan 250353 , Shandong， Chína
  • Received:2006-12-04 Online:2007-11-25 Published:2007-11-25
  • Contact: 张爱萍(1980-) ，女，博士生，主要从事植物资源化学的研究. E-mail:aiping_zhang2003@163. com
  • About author:张爱萍(1980-) ，女，博士生，主要从事植物资源化学的研究.

PDF

491

Abstract:

Milled wood lignin (MWL) was extracted from the control pulp and the laccase/ mediator system ( LMS) -modified pulp of stone ground wood , and its structure was characterized by means of elemental analysis , functional group determination , FT-IR , GPC and 1HNMR spectra. The results show that , as compared with the lignin obtained from the control pulp, the modified one is degraded and oxidated, concomitantly with the decrease of methoxyl group and phenolic hydroxyl group contents and the increase of carbonyl group content , and that the approximate molecular formulae of the lignin from the control and LMS-modified pulp are respectively C9 H8.37 O2.87 (OCH3 )0.98 and C9 H7. 83 O3. 01 (OCH3 )0.90'

Key words: stone ground wood pulp, laccase/ mediator system, modification, lignin, 1HNMR