Hänninen Tuomas A, Kontturi Eero, Isogai Akira, Vuorinen Tapani
Helsinki University of Technology, Department of Forest Products Technology, Laboratory of Forest Products Chemistry, P.O.Box 6300, FIN-02015 TKK, Finland.
Biopolymers. 2008 Oct;89(10):889-93. doi: 10.1002/bip.21023.
By comparing the ultrastructural features of two oxygen delignified hardwood kraft pulps (Eucalyptus urograndis and Betula verrucosa), we have demonstrated a marked difference in their residual lignin properties. In this study, properties such as crystallinity and crystal size of cellulose, molecular weights, carboxyl group contents, and carbohydrate compositions of the two kraft pulps were compared. The examined pulps were in our observations relatively similar. A significant difference, however, was observed in the size exclusion chromatography measurements, which indirectly suggested that a significant portion of residual lignin in eucalyptus pulp was associated with cellulose. Birch pulp, in contrast, exhibited a more conventional tendency for hardwood pulps: lignin mainly associated with hemicelluloses.
通过比较两种氧脱木素阔叶木硫酸盐浆（巨桉和疣枝桦）的超微结构特征，我们证明了它们残余木质素性质存在显著差异。在本研究中，比较了两种硫酸盐浆的纤维素结晶度和晶体尺寸、分子量、羧基含量以及碳水化合物组成等性质。在我们的观察中，所检测的纸浆相对相似。然而，在尺寸排阻色谱测量中观察到了显著差异，这间接表明桉木浆中很大一部分残余木质素与纤维素有关。相比之下，桦木浆表现出更符合阔叶木浆的传统趋势：木质素主要与半纤维素有关。
