Fabrication Of Super-hydrophobic Materials And Application In Oil-water Separation

With the rapid growth of global human population,the needs for freshwater supply are increasing.Freshwater supply is further constrained by pollution and weaknesses in water management.Organic pollutants are among the key sources of water contamination.Therefore,the technology of water purification has become increasingly important for life.With the development of science and technology,the oil and water separation technology,in the past few years,has attracted increasing attention in water purification.Traditional oil-water separation technologies fail to meet the development of modern industry because of its limitations.High efficiency and green materials are needed in urgent to meet the requirements of sustainable development for the technology of water purification.In this paper,we fabricated super-hydrophobic materials used the oil and water separation by the micro and nano morphology construction and chemical modification.To address low-cost,green,time-consuming,damage of superhydrophobicity materials with mechanical strength and so on.The main findings works are as follow:1?The stainless steel meshes with super-hydrophobic and super-oleophilic surfaces were synthesized only by immersing into an ethanol solution including HCl and stearic acid.This preparation process is simple,low-cost and green.And the obtained materials are promising application for oily water treatment.Under optimum conditions,the obtained mesh exhibited an apparent contact angle of 160 ± 1.0° for water droplet and 0° for oil droplet.The super-hydrophobic samples were stable by ultrasonic oscillation,exposure tests at atmosphere,and immersion corrosion tests into 3.5 wt % NaCl aqueous solution,respectively.The results show that the obtained materials with super-hydrophobicity was stable.2?We created a robust and stable nanostructures coated on the surface of the stainlesssteel mesh via the electrodeposition of copper thin films and chemically modified with polydimethylsiloxane(PDMS)to enhance the mechanical durability of stainless steel mesh surface with superhydrophobic performance.The obtained stainless steel mesh was evaluated by immersing in solutions of different pH values and abrasion cycling tests with sandpaper.The results showed that the stainless steel mesh coated still kept excellent superhydrophobic and superoleophilic properties.Therefore,this study offered new strategy to treat oil spills,which could be potentially used in the future for advanced-technology petrochemical industry.3 ? We fabricated a robust superhydrophobic cotton fabrics by one-step process that repeated the immersion and drying in the Copper Stearate and polydimethylsiloxane solution.The oil rapidly permeates into the obtained superhydrophobic samples while water is completely rejected,so pure oil could rapidly separate from oil/water mixture.Moreover,After 100 th cycles abrasion,the cotton fabrics coating still maintained excellent superhydrophobicity with good anti-abrasion via investigating abrasion cycling tests with 80 grid SiC sandpaper...