Reverse osmosis membranes

A process for preparing a reverse osmosis membrane, comprising:

• (A) providing a polyamine, a polyfunctional acid halide, a flux increasing additive selected from the group consisting of a beta-diketonate, a fluorinated beta-diketonate and combinations thereof, and nanoparticles;
• (B) combining the polyamine, polyfunctional acid halide, flux increasing additive, and nanoparticles on the surface of a porous support membrane;
• and
• (C) interfacially polymerizing the polyamine and the polyfunctional acid halide on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamide and the nanoparticles,
• wherein the reverse osmosis membrane is characterized by a flux that is greater than the flux of the same membrane prepared in the absence of the flux increasing additive.