Berlin 2018 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 21: Complex Fluids and Colloids II (joint session CPP/DY)
DY 21.4: Vortrag
Dienstag, 13. März 2018, 10:15–10:30, C 264
Magnetic microgels in computer simulations — •Elena Minina1,2, Pedro Sanchez1, Christos Likos1, and Sofia Kantorovich1,2 — 1University of Vienna, Vienna, Austria — 2Ural Federal University, Ekaterinburg, Russian Federation
In this work, we study magnetic microgels -- spherical colloidal particles consisting of polymer network with embedded magnetic dipolar particles -- by means of molecular dynamics computer simulations. Our main focus is concentrated on how the microgels change their shape and size depending on their internal structure and magnetic component. Microgels are initially modelled as bead-spring polymer chains randomly crosslinked into a polymer network. Changing degree of crosslinking allows us to vary microgel's internal structure. This way, we consider weekly crosslinked and highly crosslinked microgels. The fraction of magnetic particles is in the range between 0.5 to 10 per cent of the total fraction of particles comprising the polymer network. Studying such systems at different strength of dipole-dipole interactions, we estimate the change of magnetic microgel in size, self-assembly of magnetic particles and the initial magnetic susceptibility. We show that an appropriate combination of magnetic component and degree of crosslinking may offer an additional way to control.