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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: Poster Session II - Complex Fluids and Perovskites
CPP 14.12: Poster
Dienstag, 23. März 2021, 16:30–18:30, CPPp
Deformation and magnetic properties of clusters of supracolloidal magnetic polymers in microchannel under external field — •Vladimir Zverev1, Ekaterina Novak1, Sofia Kantorovich2,1, and Pedro Sánchez2,1 — 1Ural Federal University, Ekaterinburg, Russia — 2University of Vienna, Vienna, Austria
Advances in synthesis technology in the field of magnetoreactive polymer supracolloid structures (magnetic filaments) have reduced their characteristic sizes from a few micrometers to a nanoscale. Magnetic filaments are actively studied theoretically, in particular their magnetic response, rheological properties, which is important for predicting behavior in closed geometries, such as microchannels used in microfluidic devices. Microchannels are tubes whose size does not exceed hundreds of microns, and has several advantages, for example, a high speed of heat and mass transfer.
This work is devoted to the study of the effect of liquid flow and an external magnetic field on the cluster placed in the microchannel. Clusters are made from magnetic filaments that have chain, ring, X, and Y-like structures. It was found that the external magnetic field enhances the deformation of the cluster in the microchannel in a flow. Clusters can significantly change their shape, and they can also demonstrate oscillating in time magnetic response. The use of magnetic filaments in microchannels makes it possible to control hydrodynamic interactions in the microfluidic system using an external magnetic field. The work was supported by RSF 19-72-10033.