Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 1: Nanoparticles and Composite Materials I

CPP 1.6: Vortrag

Montag, 11. März 2013, 11:00–11:15, H34

In situ SAXS measurements on the imbibition of polymer melts into aligned CNT arrays — •Marina Khaneft¹, Lucas Becker¹, Thorsten Heinlein², Hermann Tempel², Jörg J. Schneider², and Bernd Stühn¹ — ¹Experimentelle Physik kondensierter Materie, Technische Universität Darmstadt — ²Eduard Zintl-Institute für Anorganische und Physikalische Chemie Technische Universität Darmstadt

We present results on the imbibition of the polymer into aligned carbon nanotube (CNT) arrays and describe the filling kinetics of the polymer. The aligned CNT structures were prepared by CVD method. We considered two types of CNT arrays: well ordered CNTs prepared within porous alumina template (PAOX). CNTs have a diameter around 40 nm and are arranged on a hexagonal lattice as were the pores of PAOX template. A second kind of CNT array consists of randomly arranged tubes with small diameter (<10 nm) grown on a quartz surface by catalytic CVD approach. The imbibitions process of polystyrene (PS) into the CNT array is followed with time-resolved small angle X-ray scattering (SAXS). We observed polymer infiltration into tube interior and interstices between CNTs. For CNT array grown in PAOX template, filling kinetics inside and outside tubes can be analysed separately. Infiltration only in inner part of CNTs can be achieved by polymer filling of CNTs situated in PAOX. Interstices between tubes can be filled after removing the template. We found the filling kinetics demonstrates two well separated processes: the formation of a precursor film and completion of the imbibition process.