Surfactants motion Colloidal suspensions

Surface Potential and Dispersion Stabilization. Most emulsions, suspensions, and foams are not thermodynamically stable, but may well possess some degree of kinetic stability. Encounters between dispersed species can occur due to Brownian motion, sedimentation, and/or stirring. The stability of the dispersion depends upon how the particles interact when this happens. More details are given in reference [153]. Surfactants are frequently involved in the stabilization of colloidal dispersions of droplets, particles or bubbles by increasing the electrostatic repulsive forces. 

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