Influence of polymer charge on the compressive yield stress of silica aggregated with adsorbed cationic polymers
Ying Zhou, Graeme J Jameson, George V Franks
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | ELSEVIER | Published : 2008
Flocs were produced by adding three cationic polymers (10% charge density, 3.0 × 105 g/mol molecular weight; 40% charge density, 1.1 × 105 g/mol molecular weight; and 100% charge density, 1.2 × 105 g/mol molecular weight) to 90 nm diameter silica particles. The compressive yield stresses of the consolidated sediment beds from settled and centrifuged flocs were determined using the volume fraction profile method. The polymer charge density plays an important role in influencing the compressive yield stresses of sediment beds. The compressive yield stresses of sediment beds from flocs induced by the 10% charged polymer were observed to increase with an increase in polymer dose, initial solids ..View full abstract
Awarded by Australian Research Council
Ying Zhou would like to thank the Australian government for the award of an IPRS scholarship and the University of Newcastle, Australia, for the award of UNRS Central scholarship. Thanks also to SNF Floerger for the donation of cationic polymers. The authors wish to acknowledge financial support from the Australian Research Council (in particular, Discovery Grant 0209669 and the Special Research Centre for Multiphase Processes).