Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 43: P8: Nanoparticles and Compsite Materials

CPP 43.10: Poster

Mittwoch, 18. März 2015, 10:00–13:00, Poster A

QCM System for the Characterization of Gas Sorption and Physical Aging on Membrane Polymers and Nanocomposites for Gas Separation Applications — •Nora Konnertz and Martin Boehning — BAM Federal Institute of Materials Research and Testing, Unter den Eichen 87, 12205 Berlin

The Quartz Crystal Microbalance (QCM) is a very sensitive method to detect mass changes in a range of nanograms. Thus this method enables sorption experiments with thin films or layers attached to the QCM crystal (in a range up to 1 μm). Here we present the experimental set-up for using the QCM technique for characterizing the gas sorption behavior of thin polymer films in a temperature controlled pressurized environment (up to 50 bar). The piezoelectric quartz crystal is driven by a frequency controlled AC voltage. Mass changes of the oscillating system result in a frequency shift and changes of the conductance is monitored by a network analyzer and calibrated based on the Sauerbrey equation. The study aims for the characterization of long-term behavior and physical aging of high-performance polymers for gas separation membranes - such as polyimides and polymers of intrinsic microporosity (PIMs) and respective nanocomposites. Especially the differences of the behavior of thin films compared to films with thicknesses up to 100 μm as well as nanofiller induced-effects have to be investigated.