Device and method for preparing super-amphiphobic self-cleaning oil-water separation material

Abstract

The invention relates to a device and a method for preparing a super-amphiphobic self-cleaning oil-water separation material, belongs to the fields of chemistry and chemical engineering, functional material and nanometer technology and in particular relates to a device with super-amphiphobic property and high separation rate. According to the device with the self-cleaning function, a main body part is an inverted T-shaped three-way pipe. Aiming at the defects existing in the conventional oil-water separation technology, titanium dioxide with a nanorod structure grows on the surface of a porousmetal substrate by a simple one-step hydrothermal deposition method, and multiple types of oil including diesel oil are respectively and simply wetted, so that the material has the super-amphiphobicproperty (super-hydrophobic in oil and super-oleophobic in water), and is applied to a special separation device so as to realize stable, continuous and high-efficiency oil-water separation. Moreover,the method is readily available in materials, simple in preparation and environmental-friendly, and the prepared material has the self-cleaning function and has very wide application prospects.

Description

technical field [0001] The invention belongs to the fields of chemical engineering, functional materials and nanotechnology, in particular to a preparation method and application method of a material with super-amphiphobic performance, high separation rate, self-cleaning function, and capable of continuous oil-water separation . Background technique [0002] In recent years, with the acceleration of industrial development and the improvement of human living standards, the discharge of industrial oily wastewater and domestic oily wastewater has also increased rapidly, resulting in environmental problems such as marine pollution. Serious impact. Therefore, oil-water separation has a wide range of application requirements and has been developed rapidly. Compared with traditional methods of separating oil-water mixtures (such as oil skimmers, flotation, centrifugation, etc.), materials with special wettability (ie, hydrophilic and oleophobic materials or oleophilic and hydroph...

AI Technical Summary

Problems solved by technology

Whether it is the superhydrophobic superoleophilic material in the initial stage, or the superhydrophilic and underwater superoleophobic material that has been rapidly developed in the later stage, the hydrostatic pressure that the material itself can withstand is limited, which means that the traditional single membrane The filter oil-water separation device is not only affected by the density of oil and water in the oil-water mixture, but also has to operate intermittently to discharge the intercepted liquid, so it cannot achieve true continuous oil-water separation

Such defects can be seen in patents CN 103977600 B, CN 104998552 B, and CN 104492276 B, which greatly limit the application of oil-water separation membranes in actual production

In the patent CN 107096391 A, the film obtained by the spraying method is subjected to different pre-wetting treatments, so that it has the properties of super-oleophobic under water and super-hydrophobic under oil respectively, and is installed in the same device to achieve The heavy liquid phase passes through the membrane 1 first, and the light liquid phase can touch the membrane 2 and pass through the membrane 2 after descending. Although it will not cause the accumulation of the liquid phase above the membrane, this method still cannot avoid the influence of hydrostatic pressure. The oil-water mixture is required to be added intermittently, and the continuous oil-water separation in the true sense has not been realized.

At the same time, in the application process of oil-water separation materials, they are easily polluted by pollutants, which will reduce the separation rate or lose the separation ability.

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