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纸浆中细小纤维和无机盐所占比例的增加降低了助留剂的使用效果,而高速纸机运行中需要高效而又不会破坏纸张匀度的助留剂。本实验合成了富阴离子和富阳离子单元的两性聚丙烯酰胺,并把两者混合作为助留剂进行实验。文中分析了絮凝过程中的应力变化和每种PAM及混合后溶液的性质,结果表明,这种混合系统可有效地产生絮凝,并提高助剂的作用。同时,文中探讨了该系统可能的絮凝机理。
Increasing the proportion of fine fibers and inorganic salts in the pulp reduces the effectiveness of the retention aid, which is required in high speed paper machines to work efficiently without breaking the uniformity of the paper. In this experiment, amphoteric polyacrylamides with anion-rich and cation-rich units were synthesized, and the two were mixed as a retention aid. In this paper, the changes of stress and the properties of each PAM and the mixed solution after flocculation were analyzed. The results show that the mixed system can effectively produce flocculation and enhance the role of additives. At the same time, the paper discusses the possible flocculation mechanism of the system.