Effect of Surface Modification of CaCO3 Nanoparticles by a Silane Coupling Agent Propyltrimethoxysilane on the Stability of Emulsion and Foam

Abstract

In this study, surface modification of CaCO3 nanoparticles by a silane coupling agent propyltrimethoxysilane (PTMS) was conducted and the effect of surface hydrophobicity on the stability of foam and emulsion was studied in order to test the potential applicability as a foam stabilizer or an emulsifier. The surface modification of CaCO3 nanoparticles by PTMS was confirmed by FT-IR, DSC and TGA analysis. The atomic concentration of CaCO3 particle surface treated by PTMS has been also identified by using XRD and XPS analyses. Both floating tests and contact angle measurements were also performed to examine the effect of PTMS concentration on the surface modification of CaCO3 nanoparticles.