Insights into the precipitation kinetics of CaCO₃ particles in the presence of polystyrene sulfonate using in situ small-angle X-ray scattering.

ABSTRACT: The formation of calcium carbonate (CaCO₃) nanoparticles (NPs) in the presence of polystyrene sulfonate (PSS) as an additive was examined by time-resolved small-angle X-ray scattering (SAXS) in a flow system that mimics experimental conditions used at home facilities where the precipitation can be achieved in a beaker. The experiments were carried out at low concentrations to remain in the dilute regime. A model-independent analysis was performed using the Porod invariant which defines the scale factor, leaving only the distribution of radii as the adjustable parameter. The presence of the PSS additive strongly retards the precipitation of CaCO₃ NPs. The formation of NPs reaches a state of equilibrium after a few minutes. Here, it is shown that the concentration of pr

SUBMITTER: Gibaud A 

PROVIDER: S-EPMC10405600 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature