Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: POSTERS Nanoparticles
CPP 14.7: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
Sidewall functionalization of carbon nanotubes for preparation of nanocomposites — •Anastasia Golosova1, 2, Gerhard Richter2, Andreas Timmann3, Rainer Jordan2, and Christine Papadakis1 — 1TU München, Physikdepartment, Garching — 2TU München, Department Chemie, Garching — 3HASYLAB at DESY, Hamburg
In polymer nanocomposites, the nanometer size active fillers can change the material properties of polymer matrices within a wide range. Among others, carbon nanotubes (CNTs) are some of the most intriguing additives due to their unique mechanical, thermal, and electrical properties. However, until now the challenge of efficient incorporation and compatibilization of the CNTs with the surrounding matrix, which is crucial for the anticipated improved properties of the composite, is still unsolved.
To tune the surface properties of CNTs we extended a recently developed modification to form well-defined self-assembled monolayers from (bi)phenyl diazonium salt derivatives on carbon-based substrates to the sidewall modification of CNTs. Successful covalent functionalization of the nanotubes was confirmed by Raman spectroscopy and thermo-gravimetric analysis.
In order to investigate the dispersion ability of modified samples, we performed SAXS experiments (HASYLAB at DESY). Intensive scattering from big agglomerates of raw carbon nanotubes in deionized water was observed, while the dispersions of modified CNTs were homogeneous, which confirms better solubility of functionalized samples.