Dresden 2017 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 4: Bioinspired Functional Materials I
CPP 4.8: Talk
Monday, March 20, 2017, 12:30–12:45, ZEU 114
Probing Adhesion with Mechano-Responsive Polymers — •Jens W. Neubauer1, Longjian Xue2, Johann Erath3, Dirk-M. Drotlef4, Aránzazu del Campo5, and Andreas Fery1,6 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Germany — 2Wuhan University, China — 3University of Bayreuth, Germany — 4Max-Planck-Institut für Polymerforschung, Mainz, Germany — 5Leibniz-Institut für Neue Materialien, Saarbrücken, Germany — 6Technische Universität Dresden, Germany
We use mechano-responsive polymers to elucidate adhesion. In gecko-inspired micropillar adhesives, for instance, a significant impact of the pillar contact geometry on the adhesion was found. Fundamental differences in their contact stress distributions were predicted by theory. We applied a mechano-responsive polyelectrolyte brush to determine the contact stress distributions of the micropillars. The mechano-response is based on the quenching of a labeled dye so that local tensile and compressive stresses affect the local fluorescence intensity. It was read out with high spatial resolution utilizing confocal laser scanning microscopy.
J.W. Neubauer, L. Xue, J. Erath, D.-M. Drotlef, A. del Campo, A. Fery ACS Appl. Mater. Interfaces 8 (2016), 17870-17877.