Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Crystallization, Nucleation and Self-assembly I

CPP 10.9: Vortrag

Montag, 1. April 2019, 17:15–17:30, H13

Fabrication of polymeric Janus nanoparticles and their behavior at liquid-liquid interfaces - a simulation study — •Tatiana Morozova and Arash Nikoubashman — Johannes Gutenberg University, Mainz,Germany

Polymeric nanoparticles (NPs) are promising candidates for a wide range of applications such as colloidal self-assembly and targeted therapeutics. Flash Nanoprecipitation (FNP) is a scalable technique for fabricating monodisperse polymeric NPs through rapid micromixing of a polymer solution with a miscible poor solvent. In this simulation work, we are studying the fabrication of Janus NPs with one solvophilic and one solvophobic hemisphere, and their behavior at liquid-liquid interfaces. We performed coarse-grained molecular dynamics simulations of the FNP process using two types of solvophobic homopolymers and one type of amphiphilic blockcopolymers (BCPs). We systematically investigated the influence of the composition and concentration of the BCPs on the resulting NP morphology. We determined the parameter space where amphiphilic Janus or core-shell NPs can be formed, and studied the conformation of BCPs at the NPs surface. Finally, in order to test the potential of these NPs as colloidal stabilizing agents, we placed them at the interface between two immiscible liquids. Indeed, we observed a significant reduction of the surface tension for both core-shell and Janus NPs.

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