Parts | Days | Selection | Search | Updates | Downloads | Help
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Nanoparticles and Composite Materials I
CPP 1.6: Talk
Monday, March 11, 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.