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制备了胶体沉淀碳酸钙(c-PCC)、菱形六面体沉淀碳酸钙(r-PCC)和偏三角形沉淀碳酸钙(s-PCC),同时分别将这3种PCC作为参比PCC与纤维素细小纤维混合制备复合填料,分别为复合c-PCC、复合r-PCC和复合s-PCC。由扫描电镜(SEM)分析可知,复合c-PCC是具有高比表面积的纳米级PCC,复合r-PCC呈簇状的蜘蛛网结构;与结构化的参比s-PCC相比,在相同实验条件下制备的复合s-PCC呈独立的椭圆状,而且部分颗粒的结构发生变形。在纸张成形过程中,复合c-PCC具有最高的留着率;在加填量较高时,加填复合s-PCC和复合r-PCC的纸张脱水明显降低。加填复合c-PCC纸张的抗张指数和内结合强度最低,而加填复合r-PCC可赋予纸张最高的z向结合强度。加入复合s-PCC和复合r-PCC的纸张紧度明显高于加填参比PCC的纸张,但纸张的光散射系数相近。在高级纸中添加细小纤维可明显改善激光打印纸和喷墨打印纸的耐磨性。
(C-PCC), rhombohedral precipitated calcium carbonate (r-PCC) and mesoporous precipitated calcium carbonate (s-PCC) were prepared and these three kinds of PCC were used as reference PCC and cellulose microfibers The composite fillers were prepared and mixed into composite c-PCC, composite r-PCC and composite s-PCC, respectively. Scanning electron microscopy (SEM) analysis shows that the composite c-PCC is a nano-sized PCC with a high specific surface area, and the composite r-PCC is in a cluster-shaped spider web structure. Compared with the structured reference s-PCC, in the same experiment The composite s-PCC prepared under the conditions of an independent oval-shaped, and part of the structure of the particle deformation. In the paper forming process, the composite c-PCC has the highest retention; at higher loadings, paper s-PCC and composite r-PCC filling paper significantly reduced dehydration. The tensile index and internal bond strength of the composite c-PCC paper is the lowest, while the composite r-PCC can give the paper the highest z-direction bond strength. The paper tightness of the composite s-PCC and composite r-PCC was significantly higher than that of the reference PCC, but the light scattering coefficient of the paper was similar. The addition of fine fibers to premium paper significantly improves the abrasion resistance of laser and inkjet paper.