Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Poster: Colloids and Complex Liquids

CPP 20.30: Poster

Tuesday, March 12, 2013, 18:15–20:15, Poster C

Mechanical load on colloidal and granular systems observed by fast confocal microscopy — •Günter K. Auernhammer, Marcel Roth, Manos Anyfantakis, Jennifer Wenzl, and Hans-Jürgen Butt — Max-Planck-Institut für Polymerforschung, Mainz, Germany

Densely packed colloidal and granular systems under mechanical load may show significant internal reorganization on a microscopy level. On a macroscopic level these reorganizations lead to permanent (plastic) deformations of the sample even at vanishing deformations of the colloids or granulates [1,2]. We use a combination of fast confocal microscopy (frame rate up to 500 Hz) [3] and nano indentation to explore the influence of a finite speed of the deformation on the reorganization dynamics. We also address specific changes that arise when switching form deformation controlled to stress controlled experiments.

[1] M. Roth, C. Schilde, Ph. Lellig, A. Kwade, G. K. Auernhammer, Eur. Phys. J. E 35 (2012) DOI 10.1140/epje/i2012-12124-8.

[2] M. Roth, C. Schilde, Ph. Lellig, A. Kwade, G. K. Auernhammer, Chem. Lett. 41 (10), 1110-1112 (2012).

[3] G. K. Auernhammer, M. Roth, and H.-J. Butt, Patent DE-10 2012 101 344.6