Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 36: Poster: Nanoparticles and Composite Materials
CPP 36.12: Poster
Mittwoch, 24. März 2010, 17:30–19:00, Poster B2
Chemical functionalization of carbon nanotubes (CNTs) for preparation of the nanocomposites — •Anastasia Golosova1,2, Rainer Jordan2, Joseph Adelsberger1, Alessandro Sepe1, Martin Niedermeier1, Sergio S. Funari3, Peter Lindner4, and Christine M. Papadakis1 — 1TU München, Physikdepartment E13, Garching — 2TU München, Department Chemie, Lehrstuhl für Makromolekulare Chemie, Garching — 3HASYLAB at DESY, Hamburg — 4ILL, Grenoble, France
CNTs feature a special combination of mechanical, electrical, and thermal properties. In spite of many attempts to obtain CNT/polymer composite materials with extraordinary characteristics, the effective incorporation of CNTs within the surrounding matrix is still challenging. The reason is that, due to effective van der Waals attraction, CNTs form large agglomerates, which behave differently from individual CNTs. Direct chemical modification of CNTs with polymer grafts proved to be efficient to enhance their dispersion ability.
We are using self-initiated photografting polymerization to form stable polymer grafts from vinyl monomers. The procedure was found to be successful for the functionalization of single- and multi-walled CNTs with polystyrene and poly(4-vinylpyridine), which is confirmed by use of Raman spectroscopy and thermo-gravimetric analysis. AFM images show deagglomeration of the CNTs after the modification. SAXS (DESY, HASYLAB) and SANS (ILL, D11) experiments were performed in order to determine the dimensions of the native and modified CNTs and their behavior in solutions.