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Physical Chemistry of Surfaces and Colloidal Systems

Lecture Excercise/laboratory
2019, Summer Semester
6
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Mo
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Credits 4
Hours per week 2 / 1 / 0
Examination C+Ex
Study Language Czech
Level []
Guarantor doc. Ing. Lidmila Bartovská, CSc.
Ing. Štěpán Hovorka, Ph.D.
Supplemental electronic materials available at UCT Prague's e-learning

Summary

In the first part of the course the student gets acquainted with the interfacial phenomena. This knowledge is applied to the description of the basic features of dispersion systems, their classification, conditions of their formation and stability, with special attention paid to the dispersion of colloidal and nano dimensions, surface interactions and particular physico-chemical properties (kinetic, optical, electrical and rheological). The third part is devoted to the description of various types of dispersions.

Syllabus

1. Influence of phase boundaries on the properties of the dispersion systems. Thermodynamics of the systems with the great interface area. Molecular view on the interface.
2. Interface energy, interface tension, temperature dependence, methods of measurement.
3. Curved interfaces. Laplace-Young equation. The influence of interface curvature on the vapour pressure and on the solubility at constant temperature. The influence of interface curvature on the vapour-liquid equilibrium and solid-liquid equilibrium at constant pressure.
4. Three-phase equilibrium. Wetting and spreading. Young equation.
5. Capillary phenomena. Surface films of non-soluble substances on liquids. Langmuir-Blodgett films.
6. Adsorption kinetics and equilibrium. Gibbs adsorption isotherm. Gas adsorption on solids. Adsorption from solutions on solids.
7. Electric properties of interfaces. Electrical double layer, electrokinetic phenomena.
8. Dispersion system, classification and characterisation. Distribution functions. Stability of dispersions.
9. Kinetic properties of dispersions influenced by the dispersity degree. Thermic motion, diffusion, sedimentation velocity, sedimentation equilibria, osmosis, membrane phenomena.
10. Viscosity of dispersions. Einstein equation. Plastic, pseudoplastic, and dilatant systems.
11. Optical properties of dispersion. Light scattering.
12. Heterogeneous dispersions. Lyosols, emulsions, foams, aerosols. solid sols.
13. Associative colloids. Critical micelle concentration.
14. Macromolecular solutions. Reversible and irreversible gels.

Literature

R: Bartovská L., Šišková M.: Fyzikální chemie povrchů a koloidních soustav, VŠCHT Praha, 2010, 9788070807453.
A: Adamson A.W.: Physical Chemistry of Surfaces, New York 1990, 0471610194
A: Shaw D.J.: Introduction to Colloid and Surface Chemistry, London 1980, 0750611820
A: Hiemenz P.C., Rajagopalan R.: Principles of Colloid and Surface Chemistry, 3rd Ed., New York 1997, 0824793978
A: Myers D.: Surfaces, Interfaces, and Colloids, VCH Publishers, Inc., New York 1999. 1560810335
A: Pashley R.M., Karaman M.E.: Applied Colloid and Surface Chemistry, John Wiley & Sons, Ltd. 2004, 0470868821

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