Colloid stability evaluation from "summary" of Physical Chemistry by Robert G. Mortimer
Colloid stability evaluation is an essential aspect of studying colloidal systems. It involves assessing the ability of colloidal particles to remain dispersed in a medium without undergoing aggregation or precipitation. To understand colloid stability, one must consider the interplay of various forces acting on the colloidal particles. These forces include electrostatic repulsion, van der Waals attraction, steric hindrance, and solvent drag. Electrostatic repulsion arises from the presence of charged particles in the colloid system. Like charges repel each other, creating a barrier that prevents particles from coming into close contact. This repulsion contributes to the stability of colloidal dispersions by preventing aggregation. In contrast, van der Waals attraction is a weak force that tends to pull particles together. When attractive forces dominate over repulsive forces, colloidal particles may aggregate and form larger c...
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