EFFECT OF SODIUM DITHIONITE ADDED XYLANASE PRETREATMENT ON STRUCTURE OF ENZYMATIC/ACIDOLYSIS LIGNIN IN SODA-AQ WHEAT STRAW PULP
Sodium dithionite added xylanase pretreatment (X/R) could enhance the peroxide bleaching efficiency of Soda-AQ wheat straw pulp. The aim of this study was to analyze the structural changes of Enzymatic/Acidolysis Lignin (EMAL) in pulps using Pyrolysis Gas Chromatography-Mass Spectrometty (PyGC-MS) and 13C-NMR. The results demonstrated that linkages between xylan and syringyl(S) or guaiacyl(G) units in lignin were preferentially reacted with xylanase in the X/R pretreatment process, and C linking with β-O-4 or C2 and C6 of lignin units were rather reactive to xylanase. FTIR spectra showed that elimination of aliphatic bonds and phenolic hydroxyl groups in EMAL happened during X/R pretreatment process.
Soda-AQ wheat straw pulp xylanase pretreatment sodium dithionite enzymatic/acidolysis lignin (EMAL)
Chaojun Wu Chuanshan Zhao Kefu Chen
Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Shandong Institute Guangdong Public Laboratory of Paper Technology and Equipment, South China University of Technology,
国际会议
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)
天津
英文
184-189
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）