engleski

Introduction of the Surface Complexation Model in the Theory of Colloid Stability

This article shows that introduction of the Surface Complexation model to the "family" of theories that are comprising the Theory of the Colloid Stability makes that theory "absolute". This means that one should characterize the electrical interfacial layer by adsorption measurements and calculate the equilibrium parameters, such as equilibrium constants of protonation and deprotonation of amphoteric surface OH groups, equilibrium constants of association of counterions, the capacitances of inner and outer interfacial layer and the total concentration of surface sites. From these equilibrium parameters one calculates the potential at the onset of diffuse layer (d) and evaluates the electrostatic interaction energy. It was shown that counterion association plays an important role in the aggregation phenomena by reducing the value of the potential d.

Particle Aggregation; Electrical Interfacial Layer; Surface Potentials; Interfacial Equilibrium; Counterion Association

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