Sanna Björkegren Industrial PhD at AkzoNobel

AkzoNobel – a global company % of revenue % Western Europe 22% Asia and pacific 3% Rest of the world 10% Latin America 20% North America 7% Europe – emerging countries people, >80 countries Headquarter in Amsterdam

Organization – business areas Decorative paints Performance coatings Automotive & Aerospace Coatings Marine and Protective Coatings Powder Coatings Industrial Coatings Wood Finishes & Adhesives Specialty Chemicals Surface Chemistry Functional Chemicals Industrial Chemicals Pulp & Performance Chemicals

My Industrial PhD project How to mix oil and water Silica nanoparticles

My PhD project OH Si O OH O-O- O Surface area of one gram = 130 m 2 ~20 nm (20x10 -9 m)

My PhD project Emulsions Foams Hydrophilic Hydrophobic

Main persons involved At PPC: Anders Törncrona Michael Persson Ylva Wildlock Peter Hell At Chalmers: Anders Palmqvist (main supervisor) Lars Nordstierna (co supervisor) Krister Holmberg Romain Bordes 8

Applications Surface active nanoparticles as stabilizers for disperse systems Pickering emulsions Pharmaceutical applications Coatings Personal Care applications Foams 9

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 10