Heteroflocculation of binary latex dispersions of similar chemistry but varying size

Bimodal colloidal mixtures: From fast to slow aggregation regions

“…Hence, the selective aggregation of large particles plays a predominate role in the early stage. Experimental results from Shenoy et al gave a similar conclusion in bimodal mixtures [22]. The similar result has been also observed for mixtures of polydisperse particles [27].…”

“…where W eff is the effective stability of bimodal colloidal mixtures which can be calculated by the formula suggested by Shenoy et al [22] or by Hogg et al [10]. In real computer simulations, half life is time to reduce the number of clusters by 50%, and we can obtain the dimensionless time s by monitoring the cluster number distribution.…”

Stability of binary colloids: kinetic and structural aspects of heteroaggregation processes

“…Different authors using both thermodynamic and kinetic approaches have studied the stability of binary latex dispersions of similar chemistry but varying size. Shenoy et al 71 derived a formally correct expression for the effective doublet stability ratio (W eff ) of a bimodal systems of 100 and 200 nm in diameter. It accounts for the difference in particle size and extends the HHF theory.…”

Dynamics of confined depletion mixtures of polymers and bidispersed colloids

“…Unsurprisingly, binary mixtures of particles of asymmetric size exhibit strikingly different properties than monodispersed mixtures; two examples are the dynamics 42 and mechanical properties 43 of glassy bidispersed mixtures. Suspensions of attractive bi-and tridispersed particles also manifest bulk properties distinct from those of monodispersed attractive particles: for example, heteroocculated binary latex dispersions exhibit different stability ratios 44 and aggregates of silica particles of three different sizes exhibit distinct fractal dimensions and strengths. 45 In colloid-polymer mixtures, studies incorporating particle polydispersity have largely focused on the equilibrium phase behavior.…”