Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Water treatment by molecularly imprinted polymer nanoparticles

: Schreiber, T.; Weber, A.; Niedergall, K.; Riegler, J.; Bryniok, D.; Hirth, T.; Tovar, G.

Cohen, Y. ; Materials Research Society -MRS-:
Materials Science of Water Purification : Proceedings of a meeting held 13-17 April 2009, San Francisco, California, USA
Warrendale, Pa.: MRS, 2009 (Materials Research Society Symposium Proceedings 1169)
ISBN: 978-1-617-82053-3
ISSN: 0272-9172
Symposium Q "Materials Science of Water Purification" <2009, San Francisco/Calif.>
Materials Research Society (Spring Meeting) <2009, San Francisco/Calif.>
Conference Paper
Fraunhofer IGB ()

Molecular recognition capabilities are evoked at artificial materials by the NANOCYTES®s-technology of the Fraunhofer IGB, Stuttgart, Germany. The biomimetic nanoparticles described here possess such molecularly recognizing properties. For this purpose they carry molecularly defined binding sites at their surface. In this particular case molecularly imprinted nanospheres (nanoMIPs) were developed for the specific adsorption of micropollutants from hospital waste water. Active pharmaceutical substances and their metabolites which were not decomposed by waste water plants were chosen as model compounds. One of this model compounds is Pentoxifylline. The nanoMIPs are prepared by a miniemulsion polymerization technique, where the monomer, the template, the cross-linker, and the initiator do react in the droplet cavities of the miniemulsion. The reaction to obtain nanoMIP particles is complex, but nevertheless it runs in a single reaction chamber and in a single step chemica l process. For synthesis of the polymer system p(methacrylicacid-co- ethylenglycoldimethacrylate), p(methacrylicacid-co-methylmethacrylate-co- ethylenglycoldimethacrylate) and p(4-vinylpyridin-co- ethylenglycoldimethacrylate) are used. The technique of miniemulsion polymerization results in particles with a typical size distribution of 50 nm to 500 nm. Additionally, an introduced magnetic core will allow the final separation of the nanoMIPs and more important of the recognized pollutants from (waste) water. We demonstrate that magnetite can be incorporated into the polymer system, and that the template Pentoxifylline does not affect the polymerization process.