Consistent Surface Potentials from Bulk Suspension Properties

The Equilibrium Properties and Microstructure of Mixtures of Colloidal Particles with Long-Range, Soft Repulsions

“…Mixtures of latices E and F show identical elastic moduli curves despite differences in particle size and charge (47). Moduli were compared with predictions made by models for charge stabilized suspension elasticities (33,34). As with osmotic pressure these models predict the low volume fraction behavior quite well but significantly underpredict elastic moduli at higher volume fractions.…”

“…The magnitude of the modulus is sensitive to the nature of the particle interaction potential and the suspension microstructure. Thus, we anticipate that the modulus will increase with at a rate depending on the second derivative of the pair potential with respect to separation distance (33,36,39).…”

“…The suspensions examined in this work were compared to osmotic pressures derived from a computational model for charge stabilized particles (33,34). This model accurately portrays the lower volume fraction behavior of these suspensions.…”

The Rheology of Bimodal Mixtures of Colloidal Particles with Long-Range, Soft Repulsions

“…The 105-nm particles, termed latex S, were prepared by emulsion polymerization described by Wood et al (37). The preparation and cleaning procedures are detailed in a previous work (32). All suspensions were prepared in 10 Ϫ4 M KCl.…”

“…This fixes the number of each type of particle in the system. The volume fraction is determined by the weight loss on drying assuming a particle density of 1.05 g/cc (32).…”