(380ah) In-Situ SAXS Study of the Nucleation and Growth of Precipitated Silica

The nucleation and growth of precipitated silica has been drawing attention. Compared with the hydrolysis reaction, the precipitation of silica is much quicker, so we focused on a millisecond reaction level. In this work, the in-situ measurement was made to follow the initial stage of the formation of silica particles by using Small Angle X-ray Scattering (SAXS). The particle size was obtained as a function of time. The experiment was carried out at different temperatures and mixing conditions, based on which, we combined the kinetic process of nucleation-growth as well as micromixing effects and established a nucleation-growth model of precipitated silica particles.