耐腐蚀超疏水超亲油不锈钢网的制备及其在油水分离过程中的应用

doi:10.13218/j.cnki.csdc.2018.05.006

Abstract

Abstract: Using stainless steel mesh as substrate,a superhydrophobic/superoleophilic stainless steel mesh with micro/nano hierarchical structure was prepared.The surface with micron-sized roughness was obtained through chemical etching and was then coated with hydrophobic/oleophilic nano-SiO₂ (the nano-SiO₂ was obtained by stöber method) through one step immersing method.The surface morphology,chemical composition and wettability of the superhydrophobic/superoleophilic stainless steel mesh were characterized by scanning electron microscopy (SEM),fourier transform infrared spectroscopy (FT-IR) and contact angle measurement (CA).The mesh was used in oil/water separation process.Results show that hydrophobic/oleophilic nano-SiO₂ was coated on the surface of chemical etched stainless steel mesh.The surface of the prepared mesh exhibited superhydrophobicity and superoleophilicity with a water contact angle of 151° and kerosene contact angle of 0°.The prepared mesh could efficiently separate not only the mixtures of water and different kinds of oil but also the mixtures of oil and corrosive aqueous solutions (containing strong acid or alkali).The anti-corrosion ability could meet the requirements of oil/water separation in complex environments.

Key words: superhydrophobic, superoleophilic, nano-SiO₂, oil/water separation, anti-corrosion

CLC Number:

TG178

DING Peng, TAI Xiu-mei, DU Zhi-ping. Preparation of anti-corrosion superhydrophobic/superoleophilic stainless steel mesh and its application in oil/water separation[J].China Surfactant Detergent & Cosmetics, 2018, 48(5): 272-277.

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Preparation of anti-corrosion superhydrophobic/superoleophilic stainless steel mesh and its application in oil/water separation

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