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270109 VO Colloid and Interface Science (2019W)

4.00 ECTS (3.00 SWS), SPL 27 - Chemie

Registration/Deregistration

Note: The time of your registration within the registration period has no effect on the allocation of places (no first come, first serve).

Details

max. 50 participants
Language: English

Examination dates

Lecturers

Classes (iCal) - next class is marked with N

Friday 04.10. 09:15 - 12:00 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 11.10. 09:15 - 12:00 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 18.10. 09:15 - 12:00 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 25.10. 09:15 - 12:00 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 08.11. 09:15 - 12:00 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 15.11. 09:15 - 12:00 Hörsaal 4 Chemie HP Währinger Straße 42
Tuesday 19.11. 09:15 - 12:00 Hörsaal 4 Chemie HP Währinger Straße 42
Monday 25.11. 13:00 - 15:45 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Friday 06.12. 13:00 - 15:45 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Thursday 12.12. 13:00 - 15:45 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Thursday 09.01. 13:00 - 15:45 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock
Thursday 16.01. 13:00 - 15:45 Seminarraum 2 Währinger Straße 38 Dekanat 1. Stock

Information

Aims, contents and method of the course

Aims
Students familiarise themselves with and understand the fundamentals of colloid and interface chemistry and science. Furthermore, how these principles can be applied: for example to understand the nature of the various inter-particle forces, how they can be calculated and applied. Understanding the origins of surface tension and how it can be altered, e.g. by the addition of surfactants, and knowing the nature of different classes of surfactants, and how they modify the properties of interfaces, be they solid, liquid or gas. Introduction into rheological concepts and viscoelasticity.

Contents:
Particle interactions: van der Waals Forces, Electrical Double layer, the effect of Polymers
Kinetic properties of particles
Interfaces: solid-gas, solid-liquid, liquid-liquid
Surface/Interfacial Tension and Wetting
Surfactants
Emulsions
Rheology of dispersed media

methods:
lectures about the various topics.

Assessment and permitted materials

oral examination with individual appointment
2 students at a time

Minimum requirements and assessment criteria

at least three questions per student
to be positive: more than half of them answered correctly

Examination topics

content of the lectures

e.g.
- what type of colloidal systems exist?
- what are colloids?
- what are interfaces?
- significant forces between colloidal particles: how they can be calculated in approximation and exactly and how they can be measured?
- how to form emulsions and foams?
- physical properties required for stable foams and emulsions to form
- how to manipulate the wettability of surfaces?
- why surfactants are active at interfaces?
- how to choose type/class of surfactant to use in certain situations? specifically which would be good to form emulsions, as dispersants and good wetting agents? which would be good to destabilise emulsions?
- why are rheological properties important in many applications and how to alter them?
- what is adsorption/absorption? how to describe these phenomena?
- electrical properties of interfaces
- kinetic properties of particles

Reading list

lecture slides
Stokes R.J. &. Evans D.F, Fundamentals of Interfacial Engineering, Wiley, 1997
Berg, JC An introduction to interfaces and colloids: The bridge to nanoscience
Aveyard, R. and Haydon, D. A. An Introduction to the Principles of Surface Chemistry. University Press: Cambridge, 1973
P. Becher, Emulsions and Emulsion Technology (Marcel Dekker), 1983. (see also 1985, 1987)
M.J. Rosen, Surfactants and Interfacial Phenomena, 3rd Ed., John Wiley & Sons Inc, Chichester, 2004.
K. Holmberg, et al., Surfactants and Polymers in Aqueous Solutions, 2nd Ed., John Wiley & Sons Inc, Chichester, 2003.

Association in the course directory

PC-5, MC-3, A.4, D.1

Last modified: Sa 30.01.2021 00:23