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DS: Fachverband Dünne Schichten

DS 27: Organic Thin Films II

DS 27.10: Talk

Wednesday, April 2, 2014, 17:30–17:45, CHE 91

Telechelic polymers and magnetic nanoparticles nanocomposites: thin dry films and hydrogels — •Antonella Campanella — JCNS Institute of Forschungszentrum Jülich GmbH, Lichtenbergstraße 1 85747 Garching, Germany

The incorporation of inorganic nanoparticles into polymer matrix has extended the particle application because of the several advantages of the polymer thin films like homogeneity and tunable physicochemical properties by increasing mechanical, magnetic and conductive properties. Such kind of nanocomposites are suitable for several modern applications, e.g. as electromagnetic wave absorbers, photovoltaic cells, OLED, data storage. In this context, the object of our study are nanocomposite systems composed of a polymer matrix which consists of hydrophobically modified ethoxylated urethane polymers (a relatively new class of industrially important macromolecules, which are gaining increasing industrial use due to their ability to impart improved rheological behavior to particulate dispersions) with core-shell magnetite nanoparticles embedded. The shell of the magnetite nanoparticles is composed by oleic acid and oleylamine, in order to provide more stability in organic solvent. We are now focusing on the structural characterization of such nanocomposites in two different morphologies: as thin dry films and as hydrogels, in order to understand the influence of the water on the structural organization of the system. The presence of magnetic nanoparticles in the dry polymer matrix shows also an interesting magnetic aspect of the system, which could be interesting for specific applications mentioned above.