Regularities of flocculation of silica hydrosol at acrylamide copolymers of the Magnaflok brand

摘要

The aggregative stability of binary mixtures of silica hydrosols of the Ludox TM brand and solutions of acrylic polymers of the Magnaflok brand have been studied by the methods of viscometry, turbidimetry, electrophoresis, and dynamic light scattering. A decrease in the aggregate stability of colloidal silica and conformational contraction of macromolecular coils with the introduction of the electrolyte leads to the formation of polymer-silica floccules. Flocculation of silica particles at macromolecules proceeds via the mechanism of heterocoagulation. When forming the hybrid polymer-silica particles, the aggregative stability of the dispersed systems grows, the coagulation rate decreases, and the time of gelation increases.