IN DEPTH STRUCTURAL ELUCIDATION OF MILLED WOOD LIGNIN BY QQ-HSQC AND 31P-NMR

摘要：

Despite the huge amount of studies performed, the degree of polymerization of lignin is to date not fully understood The authors show here that the degree of polymerization and number average molecular weight of lignin can be calculated when the C9 formula, the amount of phenolic groups and the amount of pinoresinol, diphenylethane and phenolic diphenyl lignin subunits are known. 31P-NMR and 2Dquantitative NMR allow the direct and accurate determination of the phenolic OH groups and all the lignin subunits without suffering from the lack of accuracy typical of wet chemistry methods. Resulting data on the degree of polymerization and number average molecular weight of lignin were not affected by supramolecular aggregation processes.

关键词： lignin structure lignin degree of polymerization 31P-NMR QQ-HSQC

作者: Claudia Crestini Marco Sette

作者单位: Dipartimento di Scienze e Tecnologie Chimiche, Tor Vergata University, Via della Ricerca Scientifica, 00133, Rome, Italy

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: 281-284

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）