Electrokinetic sonic amplitude method as applied to studying adsorption of high-molecular-mass compounds at interfaces

Analysis of the Structure of the Adsorbed Polymer Layers on the Surfaces of Metal Oxide Microparticles Using Digital Image Processing

“…Both a disintegrator and a vibrational action do not create the vibrations that are intense enough to overcome a cavitation threshold, and they influence a system mechanically in the sound and infrasound frequency ranges. It is seen from [3,6] that, in the presence and absence of a surface-active polymer, the results obtained with a disintegrator and a vibrational action are very similar and characterize the efficiency of an infrasound action on a system.…”

“…When studying a number of systems, we found that the optimum parameters of an infrared action are a frequency of 50 Hz and a time of 5-10 min depending on a system and other specific requirements. The optimum parameters of ultrasonic (US) treatment are 2 min and 1.5 W/cm 2 [1,2,6].…”

“…To obtain data on an increase in the quantity of adsorbed polymer per unit particle surface area, we calculated the ratios of the particle surface area before and after mechanical treatment and compared them with the ratio of the saturation concentrations [6,7]. Since the particles are spherical, the ratio of the total particle surface areas before and after mechanical acti- Relative polymer concentration, % vation can be represented as the ratio of the average particle diameters (see Table 1).…”

“…The absence of polymer stabilizers of mechanical activation was shown to coarsen particles (associates of particles are dispersed to initial particles with activated surface during mechanical action, and these particles coagulate rapidly and transform into agglomerates). In the presence of a polymer, dispersion is "fixed" due to the formation of protective adsorption-solvate polymer layers [1][2][3][4][5][6][7].…”