Preparation of a new class of polymeric composite membranes and their application in pervaporation

The preparation of composite membranes consisting of thin films of polymeric networks sustained by thicker porous supports is described. The structure of the membranes was observed with the aid of a scanning electron microscope. The membranes were tested in a vacuum pervapouration unit with a water-ethanol solution containing 10 wt % alcohol. Free dense films of the same polymeric networks were also prepared in order to compare their pervapouration performance with that of composite membranes.