Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Interfaces and Thin Films I
CPP 1.8: Vortrag
Montag, 26. März 2012, 11:45–12:00, C 130
Stimuli-responsive surfaces based on triblock terpolymer micelles — •Julia Gensel1, Eva Betthausen2, Inna Dewald1, Johann Erath1, Fouzia Boulmedais3, Axel H. E. Müller2, and Andreas Fery1 — 1Physical Chemistry II, University of Bayreuth, Germany — 2Macromolecular Chemistry II, University of Bayreuth, Germany — 3Institut Charles Sadron, Université de Strasbourg, France
The surface adsorption of stimuli-responsive block copolymer micelles on a solid substrate leads to stimuli-responsive coatings with well defined thickness and morphology. In this contribution we present a novel approach for the design of stimuli-responsive surfaces based on the deposition of charged pH-responsive core-shell-corona micelles.[1]
The adsorption of these micelles on silica is adequately described by the Random Sequential Adsorption model. By variation of the solution pH, it is possible to reversibly switch the surface micelles' charge density, swelling state and composition.[2] These switchable surfaces can be used as active surfaces for bio-applications for example for the controlled self-regulated bacteria release.
Using the layer-by-layer approach, the micelles are included within multilayer films with tailored nanostructure and integrated pH-responsive properties. The film swelling degree, morphology as well as the mechanical properties of the coatings are tunable by the solution pH. These systems are potentially interesting as nano-actuators.
[1] E. Betthausen et al., Soft Matter, 2011, 7, 8880-8891.
[2] J. Gensel et al., Soft Matter, 2011, 11144-11153.