Preparation of Superhydrophobic Cu Mesh with Corrosion Resistance and Applications in Oil-water Separation
In order to solve the existing problem of the poor corrosion resistance of the superhydropho-bic materials,a novel type of copper mesh-based superhydrophobic materials with outstanding corro-sion resistance was prepared and then was applied to the oil/water separation.The octadecylamine modified multi-walled carbon nanotubes was combined with the aminoethylaminopropyl polydimethyl-siloxane(AEAPS)modified WPU and one-step spray method was adopted to prepare the copper mesh-based superhydrophobic surfaces with nest-like structure.The as-prepared mesh shows both superhy-drophobic and superoleophilic properties simultaneously with a high water contact of 162°and an oil contact angle of 0°.Thus,they can be used to separate a series of oil/water mixtures,such as kero-sene,toluene,tetrachloromethane,petroleum and hexane with separation efficiency above 93.79%and stable recyclability.In addition,the as-prepared mesh can maintain its superhydrophobic property after soaking in corrosive solutions(1mol/L NaOH,HCl,NaCl)for 24h.
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