Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (1): 176-179. Previous Articles     Next Articles

Original Articles

木素分子氧化性氨化反应过程中的结构变化

林鹿;周贤涛;赵德胜;邱玉桂   

  1. 华南理工大学制浆造纸工程国家重点实验室
  • 出版日期:2002-01-15 发布日期:2002-01-15

Structural changes of lignins caused by oxidative ammonolysis

LIN LU;ZHOU XIANTAO;ZHAO DESHENG;QIU YUGUI   

  • Online:2002-01-15 Published:2002-01-15

Nitrogen-modified lignins was produced from the reaction of ammonia and lignins under proper conditions. ^1^3C and ^1H-^1^3C 2D-NMR HMQC spectroscopy was applied to detect the changes of lignin molecule during oxidative ammonolysis. Results showed that fragmentation of lignins molecule was highly drastic during oxidative ammonolysis. Probably oxidative modifications of moieties on the surface of lignin molecule (such as formation of CHO and COOH from CH~3 or CH~2) took place. Then nitrogen was incorporated into the lignin. However, no obvious changes was found in the highly-condensed lignin inner structures.

Key words: NUCLEAR MAGNETIC RESONANCE, CHEMICLAL MODIFICATION, BIOMACROMOLECULE, AMMONIATION

CLC Number: