Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: Poster Session 3
CPP 54.83: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Characterization of carbon nanotube containing polymer membranes — •Tönjes Koschine1, Klaus Rätzke1, Volker Abetz2, Thomas Emmler2, Muntazim Munir Khan2, Volkan Filiz2, Luca Ravelli3, Werner Egger3, and Franz Faupel1 — 1CAU Kiel, Technische Fakultät, Institut für Materialwissenschaft, Kiel — 2Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH, Geesthacht — 3Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, Neubiberg
Polymeric membranes are widely used for gas separation, where free volume is a key property for characterization. High free volume membranes, for instance PIM-1, are suitable candidates. Positron annihilation lifetime spectroscopy (PALS) is a well-established method for free volume measurements and has already been applied to these polymers [1]. In membrane applications the polymers have to be prepared as thin films and undergo aging, usually related to reduced free volume and resulting in reduced permeability. This has already been characterized by PALS [2]. In the present investigation we characterized thin films of PIM-1 and PIM-1 with 2 wt% of functionalized multiwall carbon nanotubes (f-MWCNT) on porous support (PAN). The typical thickness of the films was about 700 nm and therefore a moderated beam for positron lifetime analysis was used. All samples were measured in the as prepared state and after 300 days of aging. Results show, that incorporation of f-MWCNT into PIM results in reduced aging.
[1]R. Lima de Miranda et al., Phys. Stat. Sol. RRL 1(5), 2007, 190ff
[2] S. Harms et al., Journal of Adhesion 88, 2012, 608-619