Abstract
Most of the properties of colloidal dispersions are determined by equilibria in the electrical interfacial layer. For example, the stability of a colloidal system or adhesion of particles depends on the electrostatic potential at the onset of diffuse region of the interfacial layer. This potential is a result of several interactions of ions with active surface groups. Important systems in nature and technology are aqueous dispersions of metal oxides. Amphoteric surface groups interact with H+ ions causing development of interfacial charge and electrostatic potential. Several methods are used for characterization of these systems; among them, adsorption measurement and electrokinetics are found to be useful tools [1]. More recently, the equilibria in the interfacial layer were investigated by calorimetry [2–11]. An attempt was made to evaluate the enthalpy of reactions leading to surface charge. The problems in doing so are related to several simultaneous reactions taking place at the interface, so one can hardly distinguish different contributions to the overall enthalpy. An additional problem is the electrostatic effect on the enthalpy.
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Kallay, N., Žalac, S, Kovačeviæ, D., Pobineier, A. and Schwuger, M., to be published
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Kallay, N., Žalac, S., Kovačević, D. (1996). Thermodynamics of the Metal Oxide-Electrolyte Interface Charging. In: Pelizzetti, E. (eds) Fine Particles Science and Technology. NATO ASI Series, vol 12. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0259-6_10
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DOI: https://doi.org/10.1007/978-94-009-0259-6_10
Publisher Name: Springer, Dordrecht
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