Modification of Thin Film Composite PVA/PAN Membranes for Pervaporation Using Aluminosilicate Nanoparticles.

The effect of the modification of the polyvinyl alcohol (PVA) selective layer of thin film composite (TFC) membranes by aluminosilicate (AlO·SiO) nanoparticles on the structure and pervaporation performance was studied. For the first time, PVA-AlO·SiO/polyacrylonitrile (PAN) thin film nanocomposite (TFN) membranes for pervaporation separation of ethanol/water mixture were developed via the formation of the selective layer in dynamic mode. Selective layers of PVA/PAN and PVA-AlO·SiO/PAN membranes were formed via filtration of PVA aqueous solutions or PVA-AlO·SiO aqueous dispersions through the ultrafiltration PAN membrane for 10 min at 0.