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Yu Huang,Houbin Li,Xiongzhi Zhang,Kaiqiao Fu,Chi Huang,Shiju Yuan 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
In the present study, a series of cationic spherical polyelectrolyte brushes (CSPB), consisting of a silicacore and a shell of copolymer of acrylamide (AM) and [2-(methacryloyloxy)ethyl] trimethylammoniumchloride (METAC), were synthesized. Then a dual-component system which was composed of CSPB andanionic polyacrylamide (APAM) was used to improve the retention and drainage properties of bleachedeucalyptus kraft pulp and precipitated calcium carbonate (PCC). Comparative researches about retentionand drainage properties between CSPB/APAM system and cationic starch/APAM system wereundertaken as well. Results showed that further improvement in first-pass retention (FPR) of pulp,FPR of PCC and drainage time could be achieved by CSPB/APAM system. It was also found that increase ofshear intensity led to a decrease in retention efficiency, while it had no significant influence on drainagetime of pulp. However, due to the symmetrical or quasi-symmetrical spherical brush structure, CSPB stillshowed better retention efficiency than cationic starch under different turbulent conditions. Furthermore, the flocculation mechanism of the CSPB/APAM dual-component system was proposedin the paper.
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