淀粉基固着剂提高湿部助剂的吸附与作用效果

Improving the Adsorption of Wet End Chemicals onto BCTMP by LHCS Pretreatment

关键词:  淀粉基固着剂  BCTMP  预处理  吸附

Key Words:starch-based fixing agent  BCTMP  pretreatment  adsorption

摘要:采用一种淀粉基固着剂——低分子质量高取代度阳离子淀粉（LHCS）对漂白化学热磨机械浆（BCTMP）进行预处理，通过紫外可见光谱法测量双三嗪氨基二苯乙烯荧光增白剂（FWA）、甲基紫（MV）显白剂、聚酰胺多胺环氧氯丙烷湿强树脂（PAE）、阳离子淀粉增干强剂（DSA-CS）、烷基烯酮二聚体施胶剂（AKD）和阳离子聚丙烯酰胺（CPAM）在BCTMP纤维上的吸附量及吸附率。结果表明，LHCS预处理可在一定程度上提高这些助剂在BCTMP纤维上的吸附，从而使它们的作用效果得到明显提升。

Abstract:A starch-based fixing agent ─ low molecular weight and high cationic substitute degree starch (LHCS) was used to pretreat a bleached chemithermomechanical pulp (BCTMP). The changes of the adsorption amounts and adsorption efficiencies of various wet-end additives onto the BCTMP fibers were investigated using UV-visible spectroscopy. The additives included a fluorescence whitening agent (FWA), a methyl violet (MV), a polyaminopolyamine epichlorhydrin (PAE) wet strengthening agent, a cationic starch dry strengthening agent (DSA-CS), an alkyl ketene dimmer (AKD) sizing agent and a cationic polyacrylamide (CPAM) retention agent. The results showed that the adsorption amounts and the adsorption efficiencies of the above chemicals can be improved to different degrees by the LHCS pretreatment, and the improved adsorptions can improve their corresponding functions. In summary, the LHCS is an efficient agent in improving the efficiency of wet-end chemicals in papermaking with high-yield pulps.