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.

Quantitative Evaluation of the Interfacial Free Energies at A Solid-Liquid Lamellar Eutectic Interface

1981 ◽  
Vol 12 ◽  
Author(s):  
W. F. Kaukler ◽  
J. W. Rutter
Keyword(s):  
Free Energy ◽  
Solid Phase ◽  
Interfacial Free Energy ◽  
Eutectic System ◽  
Liquid Interfaces ◽  
Free Energies ◽  
Two Phases ◽  
Interfacial Free Energies ◽  
The Individual ◽  
Solid Liquid

The solid-liquid interfacial free energies of each of the individual phases comprising the eutectic system, Carbon Tetrabromide-Hexachloroethane, were measured as a function of composition using a “grain boundary groove” technique. Thermodynamic data were combined with groove shape measurements made from high resolution optical photomicrographs of the solid-liquid interfaces to give the interfacial free energy data. An interfacial free energy balance at the eutectic trijunction was performed to obtain all the forces acting on that point. The three interphase interfacial free energies at the eutectic trijunctions as well as a solid-solid phase boundary torque were evaluated.It was found that the solid-liquid interfacial free energies of the two phases of the eutectic could be evaluated from photomicrographs of growing or stationary eutectic interfaces. In addition, it was found that for a substantial range of freezing conditions the eutectic interface shape can be predicted from a knowledge of the interfacial free energies alone.

Relationship Between Platelet Adhesion And Free Energies At Solid-Liquid Interfaces

1981 ◽  
Author(s):  
Donald J L McIver ◽  
Samuel Schürch
Keyword(s):  
Thrombus Formation ◽  
Lower Surface ◽  
Liquid Interfaces ◽  
Free Energies ◽  
Surface Wetting ◽  
Interfacial Energies ◽  
Synthetic Coating ◽  
Foreign Surface ◽  
Solid Liquid ◽  
Lower Surface Energy

Surface induced thrombosis remains an obstacle to extra-corpeal circulation and invasive investigation and therapy of the cardiovascular system. Although the molecular details of the blood-foreign surface interaction remain incompletely understood, from a thermodynamic viewpoint, thrombosis can only occur if thrombus formation lowers the free energy of the blood-surface system. We have recently reported a method of estimating surface free energies under physiological conditions from measurements of surface wetting by polar hydrophobic fluids. Here we report a correlation between interfacial energies and platelet retention on natural and artificial surfaces, and the effects on platelet retention of a synthetic coating developed in an attempt to mimic the thromboresistance of healthy endothelium. This coating has a lower surface energy than the artery and it appears to be equally thromboresistant.

Ultrafast dynamics at solid/liquid interfaces as investigated by photothermal spectroscopy

2001 ◽  
Vol 73 (10) ◽  
pp. 1613-1623 ◽  
Author(s):  
Tsuguo Sawada
Keyword(s):  
Materials Science ◽  
Science And Technology ◽  
Solid Surfaces ◽  
Ultrafast Dynamics ◽  
Nanoscale Materials ◽  
Liquid Interfaces ◽  
Photothermal Spectroscopy ◽  
Solid Liquid

Among the recent topics of photothermal (PT) applications of lasers, we focus on ultrafast (<=1.0 ns) photothermal/photoacoustic (PT/PA) phenomena occurring at interfaces, which play important roles in nanoscale materials science and technology. Here, we describe our recently developed novel PT techniques called transient reflecting grating (TRG) spectrometries. These techniques have been applied to the studies of solid surfaces, film substrates, and solid/liquid interfaces.

scholarly journals Solvation free energies for periodic surfaces: comparison of implicit and explicit solvation models

2016 ◽  
Vol 18 (46) ◽  
pp. 31850-31861 ◽  
Author(s):  
Stephan N. Steinmann ◽  
Philippe Sautet ◽  
Carine Michel
Keyword(s):  
Free Energy ◽  
Liquid Interfaces ◽  
Free Energies ◽  
Periodic Surfaces ◽  
Solvation Energies ◽  
Solvation Models ◽  
Implicit And Explicit ◽  
Solvation Free Energies ◽  
Solid Liquid ◽  
Explicit Solvation

A strategy based on molecular mechanics free energy of perturbation, seeded by quantum mechanics, is presented to take solvation energies into account in the context of periodic, solid–liquid interfaces.

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