Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Nanoparticles and Composite Materials

CPP 41.3: Vortrag

Donnerstag, 3. April 2014, 10:00–10:15, ZEU 222

Templating Carbon Nanotubes with Block Copolymer Micelles — •Matthias M. L. Arras, Christoph Schillai, and Klaus D. Jandt — Chair of Materials Science (CMS), Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany

Control over carbon nanotube dispersion and spatial arrangement are the major issues of carbon nanotube/polymer composites.

In the present study we present the use of an amphiphilic block copolymer as a dispersing agent and its spherical micelles as a template at the same time.

High molecular weight polystyrene-block-poly(2-vinylpyridine) micelles are formed in a selective solvent and ultrasonicated together with unfunctionalized multi-walled carbon nanotubes(MWCNTs). Transmission electron microscopy pictures reveal that the MWCNTs segregate to the interface of the block copolymer.

The obtained structures depend on the length of the MWCNTs and range from split ring to wrapping of multiple micelles. The segregation to the interface is explained by a relieved chain stretching in the block copolymer interface upon crowding with MWCNTs.

We propose application as conducting polymer composites with very low percolation threshold or as a metamaterial.