fouled, blocked up and even damaged by oils because of their intrinsic oleophilicity, resulting in a quick decrease in separation efficiency, flux, and membrane life, and even secondary pollution. These drawbacks have dramatically limited their practical applications for mass production. Considering the practical applications, superoleophobic and superhydrophilic material surfaces may be more suitable for effective oily wastewater separation and long-term use, although oleophobic surfaces are often hydrophobic because of the water surface tension being higher than that of oil in air.8−10 Recently, material surfaces with underwater superoleophobicity have been proposed and investigated.Polymer and hydrogen- coated materials were broadly applied to achieve super- hydrophilic and underwater superoleophobic characteristics, and the “water-removal” method has been developed for effective water and oil separation based on these character-