THE MODIFICATION OF ALKALIN PEROXIDE MECHANICAL PULP OF TRIPLOID OF POPULUS TOMENTOSA TREATED BY LACCASE AND LACCASE/MEDIATOR SYSTEM
The Alkaline Peroxide Mechanical Pulp (APMP) of Triploid of populus Tomentosa was modified by laccase and Laccase-Mediator-System. The effects of the main parameters on the pulp physical properties were studied. They are enzyme dosages, reaction time, treatment temperature and pH value. It was found that under the optimum conditions of laccase treatment：pH 5，temperature 50℃，pulp consistency 4％ and reaction time 60 min，the optimum charge of laccase was 2u/g. It was also found that the tensile strength indexes and tear indexes of the pulps treated with laccase increased significantly. The two-stage method of enzyme-mild acidic hydrolysis was adopted to isolate lignin from the APMP pulps before or after enzymatic treatments. The functional groups in all lignin samples were qualitatively and quantitatively analyzed with infrared spectroscopy and 31P-NMR techniques.
laccase Alkaline Peroxide Mechanical Pulp lignin structure 31P-NMR Spectra
Wang Juan Liu Yu Pang Zhiqiang Lucian A.Lucia
Shandong Provincial Key Laboratory on Pulp & Paper Science and Technology, Shandong Institute of Lig Shandong Provincial Key Laboratory on Pulp & Paper Science and Technology, Shandong Institute of Lig Department of Forest Biomaterials Science, North Carolina State University, NC 27695, USA
国际会议
广州
英文
612-615
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）