Session 1: Science Today, Coatings Tomorrow
Chair: Prof. D. Claus Eisenbach, FPL, DEA continuous source for innovations in coatings technology is fundamental research in materials science, particularly in polymer science. This is easily understood, considering that the binder in a coating is a macromolecular material, and that a coatings formulation as well as the coating itself is a polymer composite system. It is the objective of this special session “Science Today – Coatings Tomorrow” to have globally renowned academic polymer materials scientists sharing their recent research results with the coatings community, and to learn about their visions, i.e., how this knowledge could open up future technologies of organic coatings.
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Monday Afternoon 14.00 – 17.30 h
Room Shanghai
1.1 14.00 – 14.30 h Polyester, polyamide, and polyimide nanoparticles prepared in the miniemulsion process Prof. Dr. Katharina Landfester, University of Ulm, DE  | ||
| 1.2 14.30 – 15.00 h Through thick and thin – Classical and new telechelic polymers in aqueous solution Prof. Dr. Martien Cohen-Stuart, Wageningen University, NL Physical gels are an intriguing and relevant class of Soft Matter. Numerous food systems can be considered as (highly complex) physical gels in which proteins and/or polysaccharides play the structural roles, but in many other products such as paints, lubricants, cosmetics and detergents physical gelation is a characteristic feature. In terms of structure, a physical gel is an open network filled with solvent; hence, the network-forming component(s) (often of macromoleculkar type) must be able to build such a network under the appropriate conditions. A well known class of network formers are the telechelic polymers belonging to the general class of S-C-S triblocks (S = sticker, C = connector); these so-called associative thickeners display very interesting static and dynamic behavior. We discuss three examples of telechelics; two of them have polyethylene oxide as the connector, and the third is a polymer consisting of hydrophilic amino acids. As 'stickers', we have considered (1) hydrophobic alkyl groups, (2)charged groups undergoing complexation, and (3)collagen-inspired polypeptide chains that can form triple helices. All these systems form small association structures (mostly micelles) at low concentrations, and networks at higher concentrations. The networks have very different relaxation times, depending on the sticker type, so that sometimes they behave like viscous fluids, whereas in other cases they can be considered as elastic, self-healing solids. Under shear, they always flow; for suitable combinations of shear rate and relaxation time the flow acquires surprising instabilities (shear banding) which lead to chaotic stress fluctuations with the same statictics as earthquakes. At interfaces, some of these molecules can lead to very unusual adsorption patterns, as well as capillary condensation, leading to weak long range attraction between hydrophobic surfaces. | ||
| 1.3 15.00 – 15.30 h Polyelectrolyte brush layers in the presence of multi-valent Ions Prof. Dr. Matthew Tirrell, University of California, US 15.30 – 16.00 h Networking: Refreshments & Coffee Break | ||
| 1.4 16.00 – 16.30 h Molecular architecture and controlled surface topography Prof. Dr. Anders Hult, KTH Royal Institute of Technology, SE | ||
| 1.5 16.30 – 17.00 h Wetting of polymer-coated surfaces Dr. Oswald Prucker, University of Freiburg, DE | ||
| 1.6 17.00 – 17.30 h Toward “everlasting” functional coatings Prof. Dr. Matthias Rehahn, Technical University Darmstadt, DE | ||
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