漆酶/介体体系改性对磨石磨木浆木素结构的影响  

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

作　　者：张爱萍[1] 秦梦华[2] 徐清华[2] 孙润仓[1] 刘传富[1] 

机构地区：[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]山东轻工业学院制浆造纸工程省级重点学科,山东济南250353

出　　处：《华南理工大学学报（自然科学版）》2007年第11期100-104,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：以磨石磨木浆为原料,对对照浆、漆酶/介体体系改性浆的木素进行分离,制得磨木木素.采用元素分析、功能基测定、FT-IR、GPC和1HNMR等分析技术探讨了漆酶/介体体系改性对纸浆中木素结构的影响.结果表明,与对照浆相比,改性浆木素发生了氧化降解反应;其中木素的甲氧基、酚羟基含量降低,而羰基含量升高;对照浆和漆酶/介体体系改性磨石磨木浆木素的C9结构单元式分别为C9H8.37O2.87(OCH3)0.98和C9H7.83O3.01(OCH3)0.90.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 C9H8.37O2.87 （ OCH3 ） 0. 98 and C9 H7.83 O3.01 （ OCH3 ） 0. 90.

关 键 词：磨石磨木浆 漆酶/介体体系 改性 木素 ^1HNMR 

分 类 号：O621.2[理学—有机化学] X793[理学—化学]