|439. Petrov, P.D.; Georgiev, G.L.; Müller, A.H.E.: Dispersion of Multi-Walled Carbon Nanotubes with Pyrene-Functionalized Polymeric Micelles in Aqueous Media, Polymer 53, 5502-5506 (2012) -- DOI: 10.1016/j.polymer.2012.09.046|
Polymeric micelles with pendant pyrene groups form complexes with multi-walled carbon nanotubes (MWNTs) by π-stacking and, thus, are able to disperse the tubes in water. Evidence is given by cryogenic transmission electron microscopy, scanning electron microscopy and atomic force microscopy. Pluronic F38 (PEO-PPO-PEO) micelles with pendant pyrene groups were obtained via UV-induced crosslinking of pentaerythritol tetraacrylate within the micellar core. The pyrene moieties were attached to the periphery of the micelles via reacting OH-groups of F38 with pyrenebutyric acid. Stabilized polymeric micelles of different pyrene content (4, 6 and 9 mol% degree of substitution) were characterized by proton NMR, UV-Vis absorption and fluorescence spectroscopies and dynamic light scattering.