Interactions in Mechanoactivated Hydrosols of Colloidal Silica and Oligoacrylates

Infrared spectra are obtained for the disperse phase of initial and mechanoactivated hydrosols of colloidal silica and binary systems with an oligoacrylate dispersion (10 wt %). Changes in the absorption bands characterizing the state of the functional groups of the considered substances are analyzed. A conclusion is drawn about interactions that occur according to the mechanism of physical adsorption with silica subjected to ultrasonic dispersion. It is found that the rotor pulse treatment of a hydrosol of silica results in the breaking of siloxane bonds, accompanied by a rise in the concentration of the silanol groups. Mechanoactivation of the binary system ensures processes of chemisorption with the formation of new types of Si–O–C and Si–C bonds.