Dispersion Stability of TiO₂ Particles in Aqueous Surfactant Solutions

Abstract

The dispersion stability of TiO₂ particles was assessed in aqueous solution of spherical and rodlike micelles. In aqueous solution of alkyl hepta (oxyethylene) ethers (C_nE₇, n=12, 14, 16) at pH 5, this parameter was independent of coexisting micelle shape, whether spherical or rodlike. It did depend on whether rodlike micelles were in a nonentangled, entangled, or concentrated state. TiO₂ particles may be mechanically captured in compact networks consisting of rodlike micelles.