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Accueil > Séminaires > Archives > Archives 2013

Smart Microgels and Nanoparticle/Microgel Hybrids : Properties and Potential Applications

Thomas HELLWEG, Université de Bielfeld (Allemagne)

par Leng Jacques - publié le , mis à jour le

Smart microgels and also microgel/nanoparticle hybrids are of growing interest due to their great potential with respect to applications [1]. The talk will review the recent work on this subject done in our group. We have made non-NIPAM based systems with different architectures and also different organic/inorganic hybrids [2,3]. Typically, the aim for the preparation of the later particles is the combination of the properties of both components, which can be e.g. the thermoresponsive behavior of a polymer like PNIPAM and optical or magnetic properties for the inorganic component.
Copolymer systems are very interesting materials with respect to tune the lower critical solution temperature of the synthesized particles for specific applications. Moreover, using e.g. core-shell architecture allows to produce systems exhibiting a swelling behavior which differs from simple Flory-Rehner behavior [4] and might be useful for new actuators on a nanoscale.
Characterization of the particles has been done using dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM) and small angle neutron scattering (SANS).

[1] T. Hellweg, J. Polymer Science, Part B, Polymer Physics, 2013, 51, 1073-1083

[2] M. Karg, I. Pastoriza-Santos, L.M. Liz-Marzán, T. Hellweg, ChemPhysChem., 2006, 7, 2298-2301

[3] M. Karg, I. Pastoriza-Santos, J. Pérez-Juste, T. Hellweg, L. M. Liz-Marzán, Small, 2007, 3, 1222-1229

[4] M. Zeiser, M., I. Freudensprung, T. Hellweg, T.,Polymer, 2012, 53, 6096-6101