|Title:||Electrostatic interaction between a charge-regulated particle and a solid surface in electrolyte solution: effect of cationic electrolytes||Authors:||Hsu J.-P.
|Keywords:||cationic electrolytes;charge-regulated particle;electrolyte solution;Electrostatic interaction;solid surface||Issue Date:||1994||Journal Volume:||272||Journal Issue:||8||Start page/Pages:||946-954||Source:||Colloid & Polymer Science||Abstract:||
The effect of cations on the electrostatic interaction between a negative charge-regulated particle and a solid surface of constant negative potential in electrolyte solution is analyzed. Here, we assume that the rate of approach of a particle to a solid surface is faster than that of the dissociation of the ionogenic groups on the surface of particle. In other words, the effect of the time-dependent dissociation of ionogenic groups on the surface of a particle is taken into account. The result of the present study reveals that, although the solid surface is negatively charged, the presence of cations in the suspension medium has a negative effect on the rate of adhesion. The qualitative behaviors in the variation of the interaction force between a particle and a solid surface as a function of separation distance between them predicted by a kinetic model and the corresponding equilibrium model and constant charge density model are entirely different. The rate of approach of a particle to a solid surface is on the order (constant charge density model)>(kinetic model)>(equilibrium model). ? 1994 Steinkopff-Verlag.
|Appears in Collections:||化學工程學系|
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