Orthokinetic heteroaggregation with nanoparticles: Effect of particle size ratio on aggregate properties
Peter D Yates, George V Franks, Graeme J Jameson
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | ELSEVIER | Published : 2008
Three different aggregation methods were employed in this work: the addition of HMW polymer, the addition of silica particles (4.3, 105 and 285 nm diameter) and adjustment of suspension pH to 9. Stable alumina dispersions (310 nm) were flocculated using these three methods and each method was found to aggregate the alumina causing equilibrium between formation and destruction of aggregates. The equilibrium size of the aggregates (from largest to smallest) was found to follow the order: HMW Polymer, MP3040, STZL, STXS (285 nm, 105 nm, 4.3 nm) and pH 9. The use of light scattering simulations showed the effect of a second particle species (silica) on the scattering intensity versus wave vector..View full abstract
The authors would like to acknowledge support from the Australian Research Council through the Special Research Centre for Multiphase Processes. P. Yates would also like to thank Graeme Bushell for the light scattering simulations.