Experimentally Justified Model-Like Description of Consolidation of Precipitated Silica

Abstract

Abstract:Colloidal gels are intermediates in the production of highly porous particle systems. In the production process, the gels are fragmented after their creation. These gel fragments consolidate to particles whose application-technological properties are determined by their size and porosity. A model of the consolidation process is proposed: The consolidation process of a gel fragment is simulated with the Molecular Dynamics (MD) method with the assumption of van der Waals forces in interplay with the thermal motion as driving forces for the consolidation. The simulation results are compared with experimental data and with a Monte Carlo (MC) simulation.

Colloid Process Engineering

“…As a model system, we used precipitated silica that is widely used as filler particles and intensely studied [74,[98][99][100][101][102][103]. After mixing the components, the modulus of the gel increased with time.…”