Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Poster II

CPP 21.19: Poster

Dienstag, 19. März 2024, 18:00–20:00, Poster E

Particles Formation in the Drying of Polymer Solution Droplets — •Mengmeng Wu, Hsiao-Ping Hsu, and Kurt Kremer — Max-Planck-Institut für Polymerforschung, Ackermannweg 10, Mainz 55128, 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's formation of drying polymer solution droplets. By inducing a high degree of polymer entanglement and maintaining below the glass transition temperature, highly porous particles are generated followed by a rapid evaporation of the solvent in a vacuum. For a drying droplet in a vacuum, the temperature experiences a decrease owing to solvent vaporization. Such temperature reduction results in a decrease in polymer solubility 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