Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: Poster: Polymer Networks and Elastomers, Hydrogels, Soft Robotics
CPP 14.4: Poster
Montag, 7. März 2016, 18:15–21:00, Poster B2
Mechanical characterization of microcapsules and their rupture under compression — •Inga Melnyk1, Ali Ghaemi2, Alexandra Philipp3, Andreas Bauer4, Klaus Last5, Stephan Gekle2, and Andreas Fery1 — 1Institute Of Physical Chemsitry and Polymerphysics, Hohestr.6, 01069 Dresden, Germany — 2Bio uid Simulation and Modeling, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany — 3Physical Chemistry I, Universitätstr. 30, University of Bayreuth, Germany — 4Henkel AG & Co. KG, Krefeld, Hentrichstr. 17-25, 47809 Krefeld — 5Follmann GmbH & Co. KG, Heinrich Follmann-Str. 1, 32423 Minden
We present the characterization of the micromechanical properties of melamine microcapsules (MCs) on the single particle level by colloidal probe atomic force spectroscopy (CP-AFM).[1] The CP-AFM allowed for the precise measurement of the mechanical response of single capsules upon lateral linear elastic deformation in the small deformation regime (deformation << wall thickness). The obtained force-deformation curves were evaluated using contact mechanics model in combination with structural information by electron microscopy.[2] To study the rupture upon compression of MCs, higher forces were applied resulting in plastic deformation and ultimately in failure of the wall material. [3] We discuss the mechanical stability of the capsule material in the context the material requirements in various microcapsule applications. [1]*M. Pretzl et al. ACS Appl. Mater. Interfaces. 2012, 4, 2940*2948. [2]*M.P. Neubauer et al. Adv. Coll. Interface Sci. 2014, 207, 65*80. [3]*A.Ghaemi et al. Chem.Eng.Sci. 2015