Dresden 2003 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 22: POSTER C

CPP 22.30: Poster

Donnerstag, 27. März 2003, 12:00–14:00, ZEU/250

Self-adaptive Surfaces on Polymer Substrates — •Mikhail Motornov and Sergij Minko — Instit fuer Polymerforschung Dresden e.V, Hohe Str. 6, D 01069-Dresden

Mikhail Motornov, Sergij Minko, Mirko Nitschke, Karina Grundke and Manfred Stamm. We report design and fabrication of hierarchically structured smart surfaces capable for reversible switching between hydrophilic and ultrahydrophobic states upon external stimuli, combining two methods of the wettability regulation. The first level of the structural organization is formed by micrometer-scale rough polymer film building a composite surface of pink-like features or polymer fibers. The second level of the structural organization is formed by the nanoscopic morphology of a phase-segregated mixed polymer brush grafted on the surface of micrometer features. We show several examples how this behavior can be used to reversibly switch wettability, adhesion and to pattern solid substrates. We use the No-dqgrafting toNo-dq approach to synthesize switchable mixed polymer brushes on the surface of radio-frequency plasma etched poly(tetrafluroethylene) film. The mixed brush exhibits switching properties caused by interplay between lateral and perpendicular to the substrate phase segregation(1,2). The range of switching is substantially amplified by the composite surface built by the pin-like highly rough morphology of the etched PTFE substrate. 1.Minko, S. et.al Environment adopting surfaces with reversibly switchable morphology. Macromol. Rapid Commun. 2001. 22, 206-211 2.Minko, S. et.al. Lateral versus perpendicular segregation in mixed polymer brushes. Phys. Rev. Lett. 2002, 88, 3, 035502-1 -035502-4