Electrostatic interaction between a charge-regulated particle and a solid surface in electrolyte solution: effect of cationic electrolytes

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题名:	Electrostatic interaction between a charge-regulated particle and a solid surface in electrolyte solution: effect of cationic electrolytes
作者:	Hsu, J.-P., Kuo, Y.-C., Chang, Y.-I.
贡献者:	Dept. of Chemical Engineering, Tunghai University
关键词:	cationic electrolytes;charge-regulated particle;electrolyte solution;Electrostatic interaction;solid surface
日期:	1994
上传时间:	2013-04-24T07:14:09Z (UTC)
摘要:	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.
關聯:	Colloid & Polymer Science 272 (8) , pp. 946-954
显示于类别:	[化學工程與材料工程學系所] 期刊論文

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