Peculiarities of the coagulation mechanism of a nanocrystalline cellulose hydrosol and a latex

Dynamic light scattering has been employed to study the coagulation kinetics of colloidal dispersion of nanocrystalline cellulose and SKS-27 ARK synthetic latex under the action of sodium chloride. It has been found that, when a system being coagulated is exposed to a mechanical action, aggregates almost cease to grow at some moment. It has been assumed that the first stage of coagulation is caused by the formation of strong contacts between primary particles and their agglomeration, while the second stage is realized via the interaction of residual hydration layers. It has been shown that, as the density of surfactant adsorption layers on the surface of latex particles is enhanced, the duration of the first stage increases, while the average hydrodynamic particle size decreases.