Role of dynamic adsorption layer in foams, emulsions, technologies

Role OF Dynamic Adsorption Layer IN Foams, Emulsions, Technologies 

A non-equilibrium state of the adsorption layer of bubbles or drops initiates adsorption processes in foams and emulsions. Transport of surface active substances in foams and emulsions can additionally be complicated by this dynamic adsorption layer. Specifically, water purification from surfactant or their fractionation are strongly influenced by a dynamic state of the adsorption layer (Section 8.8.3). 

The problem of dynamic adsorption layers does not only arise in connection with adsorption-desorption processes, it can have a substantial effect on processes of interaction between bubbles or drops and thus on coagulation and coalescence processes in foams and emulsions (Chapter 12). 

Consider flotation (Chapter 10), dynamic adsorption layers effect all stages of the elementary flotation process, since they affect the hydrodynamic field of a bubble and thus the trajectory of 

The description of dynamic adsorption layers under the condition of bubble/bubble or bubble/particle interaction is much more complex than the consideration of dynamic adsorption layers of individual bubbles discussed in the present chapter. It is still more difficult to control dynamic adsorption layers experimentally under conditions of the above-mentioned interactions. Because of these experimental difficulties, the role of mathematical modelling is extremely important in studying coagulation and heterocoagulation processes in foams and emulsions. 

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