Hannover 2013 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 19: Poster 2: Biomolecules, Cold Molecules, Experimental Techniques, Various Topics

MO 19.27: Poster

Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof

Multilayer Detection of Polymer Films Using Raman Spectroscopy — •Rasha Hassanein, Burcu Şengül, Bernd von der Kammer, and Arnulf Materny — Research Center for Functional Materials and Nanomolecular Science, Jacobs University, Campus Ring 1, D-28759 Bremen, Germany

Food packaging is an important issue for food industry, since packaging material has a great effect on food quality and storage life. Polymer foils are widely used to wrap or enclose food due to their mechanical strength, transparency, thermal stability, and since they act as efficient oxygen and aroma barrier. Packaging materials are mostly made from polyethylene (PE), polypropylene (PP), and polyamide (PA). Each of these polymers has unique properties resulting in advantages and also disadvantages regarding food safety, cost and marketing issues, and environmental impact. Thus a single layer of plastic generally does not offer all the desired properties for a food packaging application. Therefore, coating or coextrusion is often used to produce multilayer plastic foils adapted to the required properties. Food safety control includes also the investigation of food packaging materials. Food-plastics interactions can e.g. result in a leakage of toxic additives into the food. Our goal is to provide an analysis technique, wich can be also used in the production line, i.e. it should be fast, simple, and nondestructive. Raman spectroscopy, offers these advantages and therefore has been used to analyze food packaging materials. We present results of Raman spectroscopic investigations of multilayer polymer foils consisting out of different polymers with different layer thicknesses.