- Electric surface charge
Electric surface charge appears practically always on an object
surfacewhen it is placed into a fluid. All fluids contain ions, positive ( cations) and negative ( anions). These ions interact with the object surface. This interaction might lead to adsorptionsome of them on the surface. If number of adsorbed cations exceeds number of adsorbed anions, surface would gain total positive electric charge.
There is another possible mechanism leading to surface charging. It is
dissociationof the surface chemical group.
Details of the electric surfface charge description and its relation to the
surface chemistryare given by Lyklema in "Fundamentals of Interface and Colloid Science" [ Lyklema, J. “Fundamentals of Interface and Colloid Science”, vol.2, page.3.208, 1995]
* [http://www.dispersion.com/ Dispersion Technology]
Interface and Colloid Science
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