A preparation method of oil-water separation metal mesh with controllable wettability

Abstract

The invention provides a wetting controllable oil-water separation metal net preparation method and belongs to the technical field of functional materials. The preparation method comprises the steps:firstly, utilizing an optical fiber pulse laser to prepare a micropore array metal net, obtaining a super-hydrophobic / super-hydrophilic net through low surface energy modification and separating heavyoil / water; then utilizing plasma jet under the atmospheric pressure to modify the surface of the metal net to quickly decompose hydrophobic groups on the surface of the super-hydrophobic / super-hydrophilic metal net and separating light oil / water when super-hydrophilicity / underground super-oleophobicity are presented; further performing heating treatment of the metal net, making hydrophobic groupsin the material transfer to the surface layer of the material, recovering wettability into super-hydrophilicity / underground super-oleophobicity again and separating heavy oil / water again. A metal netsurface wettability regulating process of the preparation method disclosed by the invention has the advantages of simpleness, convenience, greenness and environmental friendliness; no matter harm tothe environment is guided into; furthermore, the separation efficiency on heavy oil / water and light oil / water mixture can reach 99%.

Description

technical field [0001] The invention is a method for preparing a metal mesh for oil-water separation with controllable wettability, which can separately realize the separation of light oil / water and heavy oil / water mixtures by regulating the surface wettability of a single metal mesh, and belongs to the preparation of functional surface materials field. Background technique [0002] With the development of economy, offshore oil spills and arbitrary discharge of industrial oily wastewater have become increasingly serious, threatening human health and the ecological environment. In recent years, the use of extremely wettable materials for oil-water separation has received extensive attention. [0003] CN201510898497 discloses a method for preparing an oil-water separation membrane. In this method, the aluminum mesh is first immersed in an aqueous HCl solution for surface structure treatment, and then the treated aluminum mesh is put into PVA / SiO 2 Soak for a period of time i...

AI Technical Summary

Problems solved by technology

However, before separating light oil, it is necessary to wet the copper mesh with water in advance, and before separating heavy oil, it is necessary to wet the copper mesh with oil in advance, the separation process is cumbersome, and it is impossible to separate light oil and heavy oil with a single copper mesh

[0005] CN107638714A discloses a method for preparing an oil-water separation filter by atmospheric pressure plasma. The preparation process has no pollution to the environment and high processing efficiency. However, the prepared separation filter can only separate light oil and cannot be widely used in actual oil-water separation operations. middle

[0006] Among the above research methods, the use of chemical etching to prepare the oil-water separation network has problems such as poor controllability and the use of reagents that have an impact on the human body. If the oil-water separation network is prepared by laser or plasma methods alone, the separation solution is limited and cannot be repeated. Use and other issues

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