16 Nanostructured (hybrid) membranes combining properties of inorganic and polymeric materials is an 17 integral part of the field of separation technology. Mixed matrix membranes were prepared from 18 oppositely charged inorganic (INPs) and polymeric (PNPs) nanoparticles using spin coating method. Four 19 different types of PNPs were prepared. Poly(2-dimethylaminoethyl methacrylate)-b-(methyl 20 methacrylate)) and poly((methacrylic acid)-b-(methyl methacrylate)) diblock copolymers were prepared 21 via RAFT dispersion polymerization in ethanol at 70°C. Quaternized poly(2-(dimethylamino) ethyl 22