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## Determination of rheological properties of concentrated and highly concentrated emulsions

### Katarzyna Podkościelna

#### Abstract

The main goal of this work was determination of rheological properties of concentrated and highly concentrated emulsions.. The work consists of two parts. The first one contains current theoretical scope of knowledge about emulsions. Above all, there is presented approach to modeling of flow curves for concentrated and highly concentrated emulsions. Also an effect of ultrasonic treatment on the formation of concentrated and highly concentrated emulsions is considered. The second part of the work is devoted to presentation of method of experimental investigations and analysis of the obtained results. Emulsions containing the following oil concentrations: 1%, 50%, 63%, 66%, 68%, 70%., dispersed in water have been created: For emulsification a combination of ultrasonic and magnetic stirring has been applied. This part also includes a detailed description of the activities carried out for this purpose. The flow curves were determined using a rotational rheometer with two coaxial cylinders. In order to fully visualize the rheological properties of the resulting emulsions, an apparent viscosity and reduced viscosity dependence of shear stress on shear rate were also determined. After analyzing the results one can get more information on how the increase the amount of oil in the emulsion affects its rheological properties. It can also be seen that concentrated and highly concentrated emulsions are pseudoplastic fluids.
Diploma type
Engineer's / Bachelor of Science
Diploma type
Engineer's thesis
Author
Katarzyna Podkościelna (FCPE) Katarzyna Podkościelna,, Faculty of Chemical and Process Engineering (FCPE)
Title in Polish
Badanie reologii gęstych i bardzo gęstych emulsji typu olej-woda
Supervisor
Magdalena Jasińska (FCPE/DCRED) Magdalena Jasińska,, Department of Chemical Reactor Engineering and Dynamics (FCPE/DCRED)Faculty of Chemical and Process Engineering (FCPE)
Certifying unit
Faculty of Chemical and Process Engineering (FCPE)
Affiliation unit
Department of Chemical Reactor Engineering and Dynamics (FCPE/DCRED)
Study subject / specialization
, Inżynieria Chemiczna i Procesowa
Language
(pl) Polish
Status
Finished
Defense Date
28-05-2019
Issue date (year)
2019
Pages
40
Internal identifier
DICHP-2905
Reviewers
Katarzyna Dąbkowska (FCPE/DBBE) Katarzyna Dąbkowska,, Department of Biotechnology and Bioprocess Engineering (FCPE/DBBE)Faculty of Chemical and Process Engineering (FCPE) Magdalena Jasińska (FCPE/DCRED) Magdalena Jasińska,, Department of Chemical Reactor Engineering and Dynamics (FCPE/DCRED)Faculty of Chemical and Process Engineering (FCPE)
Keywords in Polish
reologia, gęste emulsje, bardzo gęste emulsje, lepkość emulsji
Keywords in English
rheology, concentrated emulsions, highly concentrated emulsions, viscosity of emulsions
Abstract in Polish
File
• File: 1
urn:pw-repo:WUT904852fc9bda4654a390f279be9e1973