摘要
无机矿物填料常用以改善纸张的光学性能、印刷适性、匀度和平滑度等。絮聚体在湿部的尺寸及稳定性对纸张性能有着重要影响。采用阳离子聚丙烯酰胺(CPAM)和阴离子聚丙烯酰胺(APAM)复配对沉淀碳酸钙(PCC)进行预絮聚,研究了不同剪切力作用下PCC絮聚体抗剪切与再絮聚效果。研究表明,C组合(0.2 mg/g Percol 182+0.3 mg/g Percol 121)预絮聚所得填料絮聚体抗剪切能力较单一组分絮凝剂要好,絮聚体稳定性除PAM大分子桥连作用外,还与填料粒子表面电荷及PAM离子类型有关。稳定性好、尺寸大的絮聚体有利于纤维网络机械截留,高加填(55%)下絮聚体尺寸较大的C组合留着率较常规加填提高约3百分点。
Inorganic mineral fillers are often used to improve the optical properties, printability, evenness and smoothness of the paper. The size and stability of floc in wet end have important influence on the properties of paper. The precipitated calcium carbonate was preflocculated by the combination of cationic polyacrylamide and anionic polyacrylamide, the resistance and reflocculation properties of PCC floes under different shear stresses were investigated. The results show that the floes induced by group C （0.2 mg/g Perco1182＋0.3 mg/g Perco1121） is better than single component flocculant. The stability of floes is related to the bridging and neutralization mechanism. Flocs which have good stability and larger size are easier for mechanical interception by the fiber network. When the filler addition was 55%, filler content in the paper increased by 3 percentage compared to that in paper with conventional filling.
出处
《非金属矿》
CAS
CSCD
北大核心
2018年第2期23-25,共3页
Non-Metallic Mines
基金
陕西省教育厅科研计划项目资助(17JK0067)
陕西国防工业职业技术学院科研基金资助项目(GFY17-19)
