RHEOLOGICAL PROPERTIES OF AQUEOUS DISPERSIONS OF MONTMORILLONITE IN THE PRESENCE OF PHOSPHATIDE CONCENTRATE

The effect of phosphatide concentrate on the rheological properties of aqueous dispersions of the sodium form of montmorillonite was studied . It was established that phosphatide concentrate additives enable us to vary significantly the viscosity and shear stress of the dispersion s changing the liophilicity of the montmorillonite particles. Penetrat ing into the interlayer space of montmorillonite, the phospholipid mol ecules form hydration shells around the mineral particles and their ag gregates, thus efficiently reducing the dispersion viscosity and the i ntensity of the mechanical energy dissipation during the flow.