Modification of PCC with agar and its application in papermaking

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Xie, Wei^2 ; Chen, Fengting^2 ; Wang, Chunhong^2 ; Liu, Zhenhua^1^2

College of Bioresources Chemical and Materials Engineering, Shanxi University of Science and Technology, Xi'an, Shanxi Province, China^1

School of Chemical Engineering, Wuzhou University, Wuzhou, Guangxi Province, China^2

关键词: Cationic polyacrylamides;    Filler addition;    Filler contents;    Filler retention;    ITS applications;    Laser diffractions;    Precipitated calcium carbonate;    Preflocculation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/2/022054/pdf
DOI  :  10.1088/1757-899X/490/2/022054

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Modification of filler with polysaccharides such as starch, cellulose and their derivatives by preflocculation is an effective means to overcome the main drawback of mechanical strength decline resulting from filler addition. Agar is a mucilaginous polysaccharide extracted from red algaes and was used to modify precipitated calcium carbonate (PCC) for papermaking in our studies. Results showed that when 0.03% cationic polyacrylamide (CPAM) was used as retention aid, tensile index of handsheets using agar (3%, based on PCC) modified PCC as filler was 29.5% higher than native PCC, whereas filler retention did not change obviously. Optical microscope observation and laser diffraction particle size analysis confirmed that PCC was flocculated and coated by agar after modification. Characterizations of mechanical strength and filler retention of handsheets at different filler content indicated the handsheets can be filled with about 10% more agar modified PCC but to maintain the same strength level.