麦草碱木质素的过氧化氢氧化氨解 Ⅱ.氧化氨解对木质素主要官能团的影响

Oxiammonolysis of Wheat Straw Alkaline Lignin by HydroperoxideⅡ. The Effect of Oxiammonolysis on Main Functional Groups

研究了麦草碱木质素的过氧化氢氧化氨解对主要官能团的影响。结果表明过氧化氢用量、反应温度和时间对氧化氨解木质素的甲氧基、酚羟基和羧基含量均有明显的影响 ,在反应中甲氧基和酚羟基含量下降 ,而羧基含量呈上升趋势。木质素的甲氧基、羧基含量与总氮、有效氮含量均呈较好的线性关系。

The effects of oxiammonolyzation by hydroperoxide on the main functional groups of wheat straw alkaline lignin were studied. The results show that the dosage of hydroperoxide, reaction temperature and time play important roles on the content of methoxyl, phenolic hydroxyl and carboxyl groups of oxiammonolyzed lignin. The contents of methoxyl and phenolic hydroxyl groups decrease and carboxyl group increases. The contents of methoxyl and carboxyl groups have good linear relationships between the contents of total nitrogen hydrolyzable nitrogen of oxiammonolyzed lignin.