▎ 摘　　要

NOVELTY - Separation membrane comprises: a polymer support; and a graphene on at least one surface of the polymer support, where the graphene includes many grains defined by grain boundaries. USE - The separation membrane is useful: in sea-water desalination apparatus and gas separation apparatus (all claimed); and for separating of ions, gases, or liquids, in sea-water desalination plants or in separating oxygen and nitrogen and in oxygen enrichment and nitrogen production. ADVANTAGE - The separation membrane: exhibits high balance between permeability and selectivity, good resistance to heat and chemicals, good mechanical characteristics, and high selectivity with respect to gas without a marked reduction in permeability with respect to polymers. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a desalination apparatus including the separation membrane, where a width of the at least one of pore and channel in the graphene allows selective passage of water molecules and blocks hydrated salt ions from a solution containing the water molecules and the hydrated salt ions; and (2) a gas separation apparatus including the separation membrane, where a width of the at least one of pore and channel in the graphene allows selective separation of a first gas from a gas mixture containing the first gas and a second gas.