Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: POSTERS Interfaces and Thin Films
CPP 28.11: Poster
Mittwoch, 25. März 2009, 17:00–19:00, P3
Mechanical stability and permeability of porous polyaniline films fabricated by using polymer matrixes as templates — Alexander Sokolyuk1,2, Vladimir G. Sergeyev1, and •Larisa Tsarkova2 — 1Polymer Division, Department of Chemistry, Moscow State University, 119992, Moscow Russia — 2Physikalische Chemie II, Makromolecular Chemie II,
Nanostructured polyaniline (PANI) composites have high potential in chemo- and biosensor technology due to their high sensitivity and fast response. We report the preparation of porous 3D interconnected structure of PANI by using as templates polymer films with varied mechanical and physico-chemical properties. Micro-structured layers of PANI have been characterized with SEM, SFM techniques and by contact angle measurements. The permeability of the nano-composites has been investigated by exposing the films to the vapor of organic solvent or water, and by monitoring the response using in-situ spectroscopic ellipsometry. We demonstrate that incorporation of PANI particles into the polystyrene (PS) films dramatically affects the mechanical stability of the resulting composite, independent on the thickness of the underlying PS template. Both the mechanical stability and permeability of PANI-based composite films are improved by using templates from elastomeric block copolymers or from amphiphilic block copolymers.