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CZECH TECHNICAL UNIVERSITY IN PRAGUE
STUDY PLANS
2023/2024

Dispersive systems

The course is not on the list Without time-table
Code Completion Credits Range Language
102XDS Z 1 1P+1C Czech
Garant předmětu:
Pavel Demo
Lecturer:
Pavel Demo
Tutor:
Supervisor:
Department of Physics
Synopsis:

Classification of dispersion systems (suspensions, emulsions, foams, analytical, colloidal and coarse dispersions)

Colloidal dispersions and their properties. Kinetic properties (Brownian motion, diffusion, sedimentation), electrokinetic phenomena (electrophoresis, electroosmosis). Lyosols (phase, macromolecular and associative colloids).

Surfactants (inorganic, organic, organosilicate, ionic, non-ionic), micelles, critical micellar concentration).

Gels and their classification (reversible, irreversible, inorganic, organic, hydrogels, organogels). Stability of colloidal particles. Emulsions and their classification (dilute, concentrated and highly concentrated, direct, inverted). Properties, stability and structure (coagulation, coalescence, sedimentation).

Foams and their classification (dilute gas-in-liquid dispersions, wet and dry foams, foam stability, foam preparation, defoaming).

Rheological properties of dispersion systems.Einstein's equation for dilute dispersion systems. Effect of concentration, particle shape and their interaction on viscosity. Rheology of concentrated dispersion systems (time-dependent and independent non-Newtonian liquids, viscoelastic liquids, thixotropy, rheopexy). Viscosity measurements, viscometers, rheometers.

Requirements:

none

Syllabus of lectures:

Classification of dispersion systems (suspensions, emulsions, foams, analytical, colloidal and coarse dispersions)

Colloidal dispersions and their properties. Kinetic properties (Brownian motion, diffusion, sedimentation), electrokinetic phenomena (electrophoresis, electroosmosis). Lyosols (phase, macromolecular and associative colloids).

Surfactants (inorganic, organic, organosilicate, ionic, non-ionic), micelles, critical micellar concentration).

Gels and their classification (reversible, irreversible, inorganic, organic, hydrogels, organogels). Stability of colloidal particles. Emulsions and their classification (dilute, concentrated and highly concentrated, direct, inverted). Properties, stability and structure (coagulation, coalescence, sedimentation).

Foams and their classification (dilute gas-in-liquid dispersions, wet and dry foams, foam stability, foam preparation, defoaming).

Rheological properties of dispersion systems.Einstein's equation for dilute dispersion systems. Effect of concentration, particle shape and their interaction on viscosity. Rheology of concentrated dispersion systems (time-dependent and independent non-Newtonian liquids, viscoelastic liquids, thixotropy, rheopexy). Viscosity measurements, viscometers, rheometers.

Syllabus of tutorials:

Exercises follow the lecture topics

Study Objective:

The aim of the study is to introduce students to the properties of dispersive systems.

Study materials:

1. Moore W.J.: Fyzikální chemie, SNTL, Praha 1981

2. Brdička R., Dvořák J.: Základy fyzikální chemie, ACADEMIA, Praha 1977

3. Brož J.: Základy fyzikálních měření I. SPN, Praha 1983

4. Bártovská L., Šišková M.: Fyzikální chemie povrchů a koloidních soustav, skripta VŠCHT, Praha 2005

Note:
Further information:
No time-table has been prepared for this course
The course is a part of the following study plans:
Data valid to 2024-05-18
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