Dresden 2017 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations

CPP 50.30: Poster

Wednesday, March 22, 2017, 18:30–21:00, P3

Charge stability on polypropylene electrets with surfaces treated in orthophosphoric acid — •Jingwen Wang and Dmitry Rychkov — University of Potsdam, Potsdam, Germany

It is known that both, physico-chemical surface modification and thermal treatment, can lead to enhanced electret properties of dielectric polymers. To further investigate the influence of surface modifications on charge storage in polypropylene (PP) electrets, a combined thermal and chemical treatment with orthophosphoric acid (H3PO4) is applied to PP films. Charged samples are then studied by means of thermally-stimulated discharge (TSD) experiments, contact-angle measurements and Fourier-transform infrared (FTIR) spectroscopy. From the results, it can be concluded that additional deeper traps have been formed along with the treatment-induced conformation variations on the surface of the PP films. The new traps significantly improve the surface charge-stability of PP electrets.