Viscosity scaling in concentrated dispersions and its impact on colloidal aggregation.

摘要: Gaining fundamental knowledge about diffusion in crowded environments is of great relevance a variety research fields, including reaction engineering, biology, pharmacy and colloid science. In this work, we determine the effective viscosity experienced by spherical tracer particle immersed concentrated colloidal dispersion means Brownian dynamics simulations. We characterize how increases from solvent for small particles to macroscopic when large are employed. Our results show that crossover between these two regimes occurs at size comparable host size. addition, it found data points obtained various dispersions collapse on one master curve normalized plotted as function ratio mean particular, was varying volume fraction, average polydispersity distribution. Finally, extend dependent fractal cluster system undergoing aggregation. include scaling classical aggregation kernels, quantify its impact kinetics aggregate growth well shape distribution population balance equation calculations.