雷林一号桉木材AS-AQ蒸煮及残余木素和溶出木素的特性  

AS-AQ Pulping of the Eucalyptus (Laizhou No. 1) and the Characteristics of Lignin during Pulping

作　　者：周学飞[1] 余家鸾[1] 陈嘉翔[1] 

机构地区：[1]华南理工大学制浆教研组,510641

出　　处：《中国造纸》1993年第1期9-14,共6页China Pulp & Paper

基　　金：轻工业科学技术发展基金

摘　　要：研究结果表明:蒸煮到145℃以前,木素磺化反应占主导地位,温度升高木素大量溶出。蒸煮后期,残余术素和溶出木素发生缩合反应,从而导致纸浆的KMnO_4值上升,白度下降。通过研究,论证了纸浆中残余木素含量高的原因。AS-AQ pulping of the Eucalyptus (Laizhou No1) and the structural change of lignin during pulping were studied. It was found that the lignin in Eucalyptus has G-S-H structural characteristic. The ratio of S : G is 1. 25 : 1. The Mw is 6784 , Mn is 5585. The guaiacyl groups in lignin dissolved faster than syringyl groups in lignin during AS-AQ pulping. The sulfonation reaction and delignification rate in secondary walls (S) were slower than that in CC and CML during AS-AQ pulping. So the residual lignin content in AS-AQ pulp was higher. Because condensation of lignin was occurred at the end of cooking. So the permanganate number of pulp was raised and the brightness of pulp was reduced.

关 键 词：脱木素 残余木素 桉木 制浆 蒸煮 

分 类 号：TS713[轻工技术与工程—制浆造纸工程]