Semi-permeable film and separation membrane including nanoporous material, and method of manufacturing the same

A method of manufacturing a separation membrane, comprising:

• preparing a nanoporous material including a nanoporous core and a coating layer disposed on a surface of the nanoporous core, the coating layer including a particle selected from a metal hydroxide particle, a metal oxide particle, and a combination thereof;
• first coating a substrate with a first solution including a first monomer dissolved in a first solvent to obtain a first coated substrate;
• second coating the first coated substrate with a second solution including a second monomer dissolved in a second solvent, the second solvent exhibiting non-miscibility with the first solvent, at least one of the first solution and the second solution including the nanoporous material;
• and
• performing interface polymerization of the first monomer and the second monomer to form a polymer matrix comprising the nanoporous material dispersed therein, thereby obtaining the separation membrane.