Course detail
Colloid and Surface Chemistry
FSI-9KPC Acad. year: 2023/2024 Both semester
The course covers the fundamentals of colloid and surface science, including types of colloids and colloidal phenomena; the topics of the course: van der Waals Forces, electrical double layer, electrokinetic phenomena-electrophoresis, electrostatic and polymer-induced colloid stability, rheology of dispersion, surface tension and contact angle and adsorption from solution and monolayer formation.
Language of instruction
Czech
Supervisor
Entry knowledge
Knowledge of material sciences and engineering at Masters level.
Rules for evaluation and completion of the course
The examination evaluating theoretical knowledge and its practical application will take the form of a 30-minute presentation with a discussion on colloidal and surface chemistry topics related to the doctoral dissertation.
The course will take place according to the number of candidates through consultations or lectures. At the end of the course the doctoral student will prepare a thematic presentation from the field of coloidal and surface chemistry.
Aims
The course will provide students with the basic physico-chemical knowledge required for experimental study in the field of inorganic colloids and the surface behavior of inorganic particles.
The course will provide students with the basic physico-chemical knowledge needed for experimental study in the field of material synthesis, material shaping and properties of non-metallic materials in particular for doctoral study of material and physical engineering.
The study programmes with the given course
Programme D-MAT-K: Materials Sciences, Doctoral, recommended course
Programme D-MAT-P: Materials Sciences, Doctoral, recommended course
Type of course unit
Lecture
20 hours, optionally
Syllabus
1. Van der Waals Forces (vdwf) (London, Keeson, Debey interactions), potential energy curves, molecular interactions and power laws, molecular origins of vdwf, measurement of vdwf, effect of the environment on vdwf.
2. Electrical double layer, surface charging, diffuse double layer, Debey – Hűckel approximation, electrical double layer, Gauy – Chapman theory, Stern adsorption.
3. Electro-kinetic phenomena – electrophoresis, mobilities of small ions and macroions in electric field, zeta potential (ZP): thick double layer, thin double layer, general theory for spherical particles, electroosmosis and streaming potential. Applications of electrokinetic phenomena (colloid stability, eletrophoretic deposition).
4. Electrostatic and polymer induced colloid stability, interparticle forces, stability of dispersion, theory of colloid stability (electrolyte concentration, critical coagulation concentration), theory of coagulation in dilute dispersion, polymer-colloid mixtures, interaction between polymer-coated particles.
5. Rheology of dispersion, Newton´s low of viscosity, viscometers, Navier-Stokes equation, deviations from the Einstein model, non-newtonian behaviour, viscosity of polymer solutions.
6. Surface tension and contact angle, surface tension and surface free energy, surface tension and capillarity, curved interface and phase equilibria, relation between surface tension and contact angle: Young equation, contact of liquids with porous solids (porosimetry).
7. Adsorption from solution and monolayer formation, thermodynamics of adsorption from solution, adsorption on solid surface: Langmuir equation, adsorption in the presence of an applied potential, electrocapillarity.