Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Poster: Interfaces and Thin Films (joint session with DECHEMA and VDI)

CPP 9.41: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Coat Thickness Dependent Adsorption of Hydrophobic Molecules at Polymer Brushes — •Jens Smiatek¹, Hendrik Wagner², Carsten Hentschel³, Lifeng Chi³, Armido Studer², and Andreas Heuer⁴ — ¹Institut für Computerphysik, Universität Stuttgart, Germany — ²Institut für Organische Chemie, WWU Münster, Germany — ³Physikalisches Institut, WWU Münster, Germany — ⁴Institut für Physikalische Chemie, WWU Münster, Germany

We study the adsorption properties of hydrophobic test particles at polymer brushes with different coat thicknesses via mesoscopic Dissipative Particle Dynamics simulations. Our findings indicate stronger adsorption energies at thin polymer brushes. The reason for this difference is mainly given by entropic contributions due to different elastic deformations of the coatings. The numerical findings are supported by analytical calculations and are in good agreement to experimental fluorescence intensity results.