Stability and Instability in Disperse Systems

Abstract The balance of the forces of interaction between colloidal particles determines, in general, whether a colloidal dispersion remains stable or undergoes coagulation or flocculation. A review of interaction forces is given and it is then shown how such forces can be measured experimentally using either macroscopic systems or particulate dispersions. Particular attention is given to the repulsive forces which arise from electrostatic charges and/or adsorbed layers. From an understanding of these forces some rationalization can be made of the many phenomena which constitute colloid and interface science.

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