Regensburg 2025 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 23: Polymer and Molecular Dynamics, Friction and Rheology

CPP 23.3: Talk

Wednesday, March 19, 2025, 10:15–10:30, H34

Porous Particles Formation in the Drying of Polymer Solution Droplets — •Mengmeng Wu, Hsiao-Ping Hsu, and Kurt Kremer — Max-Planck-Institut für Polymerforschung, Mainz, Germany

Due to the unique properties such as large specific surface area, high permeability and low density, porous polymer nano- or micro-spheres are promising for various applications including biomedical, pharmaceutical, tissue engineering and degradable electronic applications. We develop a coarse-grained polymer solution droplet model to study the particle structure formation of drying polymer solution droplets. By maintaining below the glass transition temperature, highly porous particles are generated followed by a fast evaporation and cavitation of solvents. For a drying droplet in an environment with low thermal conductivity, the temperature experiences a decrease owing to solvent vaporization. Such temperature reduction results in a decrease in evaporation rate during evaporation, consequently impacting the drying dynamics of polymer droplets. Our investigation explores how the cooling of droplets during solvent evaporation influences the final morphology of polymer particles.

Keywords: glass transition; evaporation; droplet; porous particles; drying dynamics