June 23th - June 27th 2008
Noordwijk, The Netherlands
| COSI 2008 June 23th - June 27th 2008 Noordwijk, The Netherlands |
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| 4th Coatings Science International 2008 | |||||||||
| Björn Weber (MSc) | |||||||||
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University Paderborn, Germany |
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| Title lecture | |||||||||
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Creating new materials with melamine resins |
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| Author | |||||||||
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Björn Weber, Wolfgang Bremser, Karl Hiltrop |
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| Abstract | |||||||||
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The acid catalyzed condensation of well known melamine resin of HMMM type in aqueous phase leads to new functional particles and up to now unknown lamellar mesoscopic gels. The gels are used as templates for a subsequent mineralization process in order to create an organic-inorganic hybridmaterial. The particle formation starts with non spherical nanoparticles which could be functionalized for further coating applications. Lamellar particles in the µm-range with hexagonal symmetry could be isolated. First investigations give an indication for an energy minimized layer by layer condensation of the melamine crosslinker molecules. Out of these platelet structures as precursors a mesoporous gel with essentially lamellar walls and pore sizes between 100 nm – 10µm is formed. The architectior can be controlled over a wide range by concentration and the use of crosslinkable dispersions. Inside the pores of the gel calcium carbonate crystals with different morphologies are formed either by a double diffusion mineralization process or by the use of polymer induced liquid precursors. The structural and mechanical properties of these materials are investigated.
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