Isotope exchange kinetics at heterogeneous solid surfaces (solid-liquid interfaces)

1984 ◽  
Vol 115 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Marek Kosmulski ◽  
Mieczys?aw Jaroniec
Keyword(s):  
Isotope Exchange ◽  
Solid Surfaces ◽  
Liquid Interfaces ◽  
Exchange Kinetics ◽  
Solid Liquid ◽  
Heterogeneous Solid ◽  
Isotope Exchange Kinetics

Adsorption of surfactants at solid/liquid interfaces

Surfactants ◽  
2019 ◽  
pp. 130-155
Author(s):  
Bob Aveyard
Keyword(s):  
Strong Influence ◽  
Langmuir Equation ◽  
Solid Surfaces ◽  
Polymeric Surfactant ◽  
Fluid Interfaces ◽  
Liquid Interfaces ◽  
Free Energies ◽  
Micellar Aggregates ◽  
Diffuse Part ◽  
Solid Liquid

The physical properties of solid/liquid interfaces are more diverse than those of liquid/fluid interfaces, and consequently the interactions giving rise to adsorption of surfactant or polymeric surfactant are more varied. Solid surfaces can be either hydrophilic or hydrophobic, the former being water-wetted and containing polar or ionogenic sites. Electrical charge at the solid surface is neutralized by ions in the inner and outer Helmholtz planes and in the diffuse part of the electrical double layer. Surface charge has a strong influence on adsorption of ionic surfactants. Standard free energies of surfactant adsorption are obtained by use of an appropriate adsorption isotherm such as the Stern–Langmuir equation. Micellar aggregates of various shapes and sizes can also form at solid/liquid interfaces.

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