sanna björkegren sanna.bjorkegren@chalmers.se
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Sanna Björkegrensanna.bjorkegren@chalmers.se
Industrial PhD at AkzoNobel
AkzoNobel – a global company
% of revenue 2011 38%WesternEurope
22%Asia and pacific3%
Rest of the world
10%Latin
America
20%North America
7%Europe – emerging
countries
55 000 people, >80 countriesHeadquarter in Amsterdam
Organization – business areas
Decorative paints
Performance coatingsAutomotive & Aerospace CoatingsMarine and Protective CoatingsPowder CoatingsIndustrial CoatingsWood Finishes & Adhesives
Specialty ChemicalsSurface ChemistryFunctional ChemicalsIndustrial ChemicalsPulp & Performance Chemicals
My Industrial PhD project
How to mix oil and water
Silica nanoparticles
My PhD project
OH
SiO
Si
Si
OH
O-
O
Surface area of one gram = 130 m2
~20 nm(20x10-9m)
My PhD project
Si
HO
OH CH3
O
O
Si
O
HO
O
Si
Si
Si
Si
O
OH
O
O
O
O
O
O
O
O
CH3
EmulsionsFoams
Hydrophilic
Hydrophobic
8
Main persons involved
At PPC:Anders TörncronaMichael PerssonYlva WildlockPeter Hell
At Chalmers: Anders Palmqvist (main supervisor)Lars Nordstierna (co supervisor)Krister HolmbergRomain Bordes
9
Applications
Surface active nanoparticles as stabilizers for disperse systems
Pickering emulsionsPharmaceutical applicationsCoatingsPersonal Care applications
Foams
10
Aim of the project
To obtain a deeper knowledge of how surface modified silica nanoparticles behave in colloidal and surface chemical contexts
To evaluate the stability of the functionalization of silica and the dynamics of the particle surface
To identify suitable characterization methods that can be used for the study of surface modified silica particles
To evaluate application areas within the field of stabilization of disperse systems
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