Abstract
Since its first publication in 2006 integral-asymmetric polystyrene-b-poly(4-vinyl pyridine) block copolymer membranes gained a lot of attention due to their highly ordered surface pores, high flux and good separation properties. We showed in 2011 that these membranes are pH switchable with high flux above pH 5 and very low flux below pH 4 due to their cationic character. We later modified the membrane into a polyanionic polysyrene-b-poly(4-vinylpyridine-N-oxide) membrane showing a reverse pH-dependent flux behavior. Recently we transformed the membrane into an isoporous polystyrene membrane with ultra-high flux over the entire pH range. In our current work we modified the original membrane by embedding single wall carbon nanotubes into the structure leading to a composite with remarkable properties. For the first time a SWCNT-PS-b-P4VP film-based chemiresistive sensor is introduced exploiting the synergistic effect of SWCNTs on the one hand and nanochannel arrays aligned perpendicular to the surface of a film on the other hand.