木聚糖酶诱导释放负电荷及其对漂白硫酸盐浆纤维胶体作用和留着的影响  

Xylanase-induced liberation of negatively charged species and their effect on colloidal interactions and the retention of bleached kraft pulp fibers

作　　者：苗成 刘忠 

出　　处：《中华纸业》2016年第6期65-71,共7页China Pulp & Paper Industry

摘　　要：本文研究未干燥的漂白硫酸盐浆中各种内切-1,4-β-木聚糖酶组分释放负电荷的能力和特异性,同时分析木聚糖组分溶解液对浆料滤液性能和化学留着的影响。实验结果表明,电荷释放的数量和木聚糖酶相关,溶解木聚糖的质量和电荷释放量不成线性关系。化学留着实验表明,高含量溶解木聚糖能够影响胶体的固化作用,因为该过程能够移除溶解的半纤维素。本文探究残留的半纤维素和改性纤维性能对化学留着的作用和浆内施胶的影响。The ability and specificity of various monocomponent endo-1,4-β-xylanases to release negatively charged species from never-dried, bleached, birch kraft pulp was studied. The effects of dissolution of these xylan-based components on pulp filtrate properties and the subsmoluent chemical retention were determined. The results revealed that the amount of charged species released depended on the xylanase and that the ratio of charged species released to dissolved xylan is not linear. Chemical retention tests showed that high levels of dissolved xylan interfere with the fixation of colloidal species, which was confirmed by removing the dissolved hemicelluloses. The roles of residual hemicellulose and the properties of modified fibers on chemical retention and the level of internal sizing are discussed.

关 键 词：阳离子需求量 带电粒子 胶体作用 留着 木聚糖酶 δ电位 

分 类 号：TS727.1[轻工技术与工程—制浆造纸工程] TS743.14