聚丙烯酰胺改善硫酸钙加填纸张PG黄染料染色效率的研究

Study on Improving the Dyeing Efficiency of PG Yellow Dye on Paper Filled with Calcium Sulfate by Polyacrylamide

关键词:  PG黄染料  染色性能  无水硫酸钙  聚丙烯酰胺  填料留着率

Key Words:PG yellow dye  dyeing property  anhydrous calcium sulfate  polyacrylamide  filler retention

摘要:针对纸厂生产实践中无水硫酸钙（CaSO₄）加入抄造体系后会严重影响PG黄染料染色效率的问题，本课题提出一种在浆料中加入聚丙烯酰胺进行改善的方法。探究了阳离子聚丙烯酰胺（CPAM）和两性聚丙烯酰胺（AmPAM）两种高聚物对PG黄染料染色效率的影响，其中CPAM或者AmPAM的加入均能有效提高PG黄染料的染色效率。研究表明，当CPAM添加量为0.05%或AmPAM添加量为0.06%时，PG黄染料的染色效果提高较为明显，且这两种助剂的加入均能提高填料CaSO₄的留着率。并进一步推断了2种聚丙烯酰胺对改善PG黄染料在纸张中的染色效率及无水CaSO₄填料留着率的影响机制。

Abstract:Due to the problem that anhydrous calcium sulfate （CaSO₄） added to the papermaking system in the factory production practice would seriously affect the dyeing efficiency of PG yellow dye， an improvement method of adding polyacrylamide （PAM） into the slurry was proposed in this paper. The effects of cationic polyacrylamide （CPAM） and amphoteric polyacrylamide （AmPAM） on the dyeing efficiency of PG yellow dye were studied. It found that both of CPAM and AmPAM could effectively improve the dyeing efficiency of PG yellow dye when the addition of CPAM was 0.05% or AmPAM was 0.06%. In addition， it showed that the addition of two additives could also improve the retention of CaSO₄ fillers. Finally， the influence mechanism of two kinds of polyacrylamide on improving the dyeing efficiency of PG yellow dye and the retention of anhydrous CaSO₄ filler was further inferred.