Complex and material containing same for oil-water separation

A water repellency complex for oil-water separation comprising:

• a polymer sponge having a cavernous porous structure;
• a zinc oxide particle layer formed on the polymer sponge;
• and
• a superhydrophobic coating layer formed on the zinc oxide particle layer,
• wherein the superhydrophobic coating layer includes C10 to C30 fatty acid and a silane compound substituted with a C4 to C20 fluorinated alkyl group and a halogen group,
• wherein the polymer sponge includes one or more polymers selected from the group consisting of melamine resin and polyurethane,
• wherein the zinc oxide particle layer has a micro-nano structure in which zinc oxide particles are agglomerated in a flame or snowflake shape on the surface of the polymer sponge,
• wherein the zinc oxide particles have an average length of 2 μm to 10 μm and an average thickness of 0.1 μm to 2 μm, and a ratio (L/D) of an average length (L) to an average thickness (D) ranges from 2 to 10,
• wherein the fatty acid includes one or more selected from the group consisting of capric acid, lauric acid, myristic acid, stearic acid, arachidic acid, and behenic acid,
• wherein the complex has an average sliding water contact angle and an average shedding water contact angle of 7°, and
• wherein the complex has an average static water contact angle of 170° to 180°.