A PRELIMINARY INVESTIGATION ON ENZYMATIC OXIDATIVE POLYMERIZATION OF LIGNIN

摘要：

Enzyme catalyzed oxidative polymerization of technical bagasse lignin and low-molecular-weight ultra-filtered kraft pulp lignin (UFL) were studied in methanol-water solution. Lignin was dissolved in methanol-water solution at pH 13 in steam heated autoclave at 130℃ for 2h. The polymerization reaction was conducted at 40℃ with a commercial laccase under oxygen saturation. The weight-average molecular weight (Mw) of original macromonomer and polymerized lignin were characterized with alkaline size exclusion chromatograph (SEC) system. Enzyme treatment increased the molecular weight of both technical bagasse lignin and ultra-filtered lignin up to 20 times. The reaction time and the enzyme dosage were studied to obtain the maximal molecular weight.

关键词： laccase polymerization technical bagasse lignin ultra-filtered lignin

作者: Hongli Zhu Dimitri Areskogh Mikaela Helander Gunnar Henriksson

作者单位: Division of Wood Chemistry and Pulp Technology, Department of Fibre and Polymer Technology, Royal In Wallenberg Wood Science Center, Royal Institute of Technology, KTH, Stockholm, Sweden Division of Wood Chemistry and Pulp Technology, Department of Fibre and Polymer Technology, Royal In

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 238-241

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）