Wear-resistant and repairable super-hydrophobic metal net and preparation method thereof

Abstract

The invention discloses a wear-resistant and repairable super-hydrophobic metal net and a preparation method thereof. The preparation method comprises the following steps: (1) cleaning the metal net, and removing organic pollutants and dust attached to the surface; (2) soaking the cleaned metal net in an n-hexane solution of polydimethylsiloxane for 3-5 minutes, then taking out the metal net, and curing the metal net in a drying oven at 120 DEG C for 2 hours to obtain the metal net of which the surface is coated with polydimethylsiloxane; and (3) combusting the metal net with the surface coated with the polydimethylsiloxane through outer flame of flames, thereby obtaining the wear-resistant and repairable super-hydrophobic metal net. The preparation method is simple and easy to operate, reaction conditions are mild, the surface of the prepared metal net is of a good rough structure, the metal net has excellent super-hydrophobic characteristic and good durability, after the metal net loses the super-hydrophobic characteristic through repeated mechanical friction, the super-hydrophobic characteristic can be recovered only through combustion treatment of outer flames, and therefore, the method can be applied to the field of oil-water separation.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a wear-resistant and repairable super-hydrophobic metal mesh and a preparation method thereof. Background technique [0002] The frequent occurrence of marine oil spill accidents worldwide and the large amount of oily wastewater discharged in daily life and industrial processes not only pose a huge threat to the marine environment and aquatic ecosystem, but also pose a huge threat to human health. Oil-water separation is an important process for treating oil-water mixtures, so it has received extensive attention. Traditional oil-water separation methods include gravity separation, sedimentation, filtration and other methods. However, due to the low separation efficiency or complicated operation steps, the above-mentioned methods still have deficiencies in the versatility, ease of use and adaptability of oil-water separation. Therefore, how to effectively separate the oil-wat...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a wear-resistant and repairable superhydrophobic metal mesh and its preparation method, by using the metal mesh as the base and modifying the surface with polydimethylsiloxane Finally, the superhydrophobic metal mesh with wear resistance and solvent resistance is prepared by using the outer flame combustion treatment, and the prepared metal mesh loses the superhydrophobic property after repeated mechanical friction, and can be burned again by the outer flame of the flame. Restoring the super-hydrophobic properties, overcoming the current disadvantages of poor durability and irreparable surface wettability of traditional metal mesh materials

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