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One-step preparation of superhydrophilic/underwater superoleophobic oil-water separation mesh and method

A super-oleophobic oil and super-hydrophilic technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of inability to prepare super-hydrophilic/underwater super-oleophobic oil-water separation omentum, and achieve production Low cost, reduced usage, design science effect

Inactive Publication Date: 2021-10-15
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is: to provide a one-step method for preparing superhydrophilic / underwater superoleophobic oil-water separation omentum, and to solve the problem that in the prior art, superhydrophilic / underwater superoleophobic membranes cannot be prepared at the same time at the cathode and anode at one time. Oleophobic oil-water separation membrane, the problem of subsequent modification

Method used

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  • One-step preparation of superhydrophilic/underwater superoleophobic oil-water separation mesh and method
  • One-step preparation of superhydrophilic/underwater superoleophobic oil-water separation mesh and method
  • One-step preparation of superhydrophilic/underwater superoleophobic oil-water separation mesh and method

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Embodiment 1

[0035] This embodiment discloses a method for preparing a superhydrophilic / underwater superoleophobic oil-water separation omentum by one-step method of the present invention, specifically:

[0036] Step 1. Pretreatment of cathode and anode materials: two pieces of stainless steel wire mesh of the same size are ultrasonically cleaned with absolute ethanol and a large amount of distilled water to remove surface organic matter, residual liquid and other impurities, and then dried in a 60°C drying oven for later use , the aperture of the stainless steel wire mesh is 80 mesh;

[0037] Step 2. Preparation of electroplating solution: take a certain amount of nickel sulfate, add distilled water to dissolve, and prepare a nickel-containing solution with a concentration of 0.5mol / L, then adjust the pH of the solution to 10 with ammonia;

[0038] Step 3. Preparation of the metal mesh coating base: Insert the two pieces of metal mesh treated in step 1 into the double-electrode electrolyt...

Embodiment 2

[0043] This embodiment discloses a method for preparing a superhydrophilic / underwater superoleophobic oil-water separation omentum by one-step method of the present invention, specifically:

[0044]Step 1. Pretreatment of cathode and anode materials: two pieces of titanium mesh with the same size and 200-mesh pore size are ultrasonically cleaned with absolute ethanol and a large amount of distilled water to remove surface organic matter, residual liquid and other impurities. Dried in a drying oven for later use;

[0045] Step 2. preparation of electroplating solution: take a certain amount of nickel nitrate, add distilled water to dissolve, be mixed with a concentration of 0.8mol / L nickel-containing solution, then adjust the pH of the solution to 8 with ammonia;

[0046] Step 3. Preparation of the metal mesh coating base: Insert the two pieces of metal mesh treated in step 1 into the double-electrode electrolytic cell, and make the cathode and anode respectively, and add the e...

Embodiment 3

[0049] This embodiment discloses a method for preparing a superhydrophilic / underwater superoleophobic oil-water separation omentum by one-step method of the present invention, specifically:

[0050] Step 1. Pretreatment of cathode and anode materials: Clean two pieces of copper wire mesh with the same size and 80-mesh aperture with absolute ethanol and a large amount of distilled water in order to remove the surface organic matter, residual liquid and other impurities. Dried in a drying oven for later use;

[0051] Step 2. Preparation of electroplating solution: take a certain amount of nickel chloride, add distilled water to dissolve, and prepare a nickel-containing solution with a concentration of 0.1mol / L, then adjust the pH of the solution to 12 with ammonia;

[0052] Step 3. Preparation of the metal mesh coating base: Insert the two pieces of metal mesh treated in step 1 into the double-electrode electrolytic cell, and make the cathode and anode respectively, and add the ...

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Abstract

The invention discloses a one-step method for preparing a superhydrophilic / underwater superoleophobic oil-water separation mesh and a method, which solves the problem that in the prior art, the superhydrophilic / underwater superoleophobic oil-water separation mesh cannot be prepared at the same time at the negative and positive poles at one time. Membrane, the problem of subsequent modification. The one-step method of the present invention prepares a superhydrophilic / underwater superoleophobic oil-water separation mesh, using a metal mesh as the anode and cathode, and an aqueous solution containing nickel ions as the electroplating solution, and at a certain temperature by ultrasonic electrodeposition, Hydrophilic rough structures are generated at the cathode and anode, respectively, so that a superhydrophilic / underwater superoleophobic oil-water separation mesh with a micro-nano layered structure is simultaneously prepared at the anode and cathode. The invention has scientific design and simple operation, and a superhydrophilic / underwater superoleophobic oil-water separation omentum with a micro-nano layered structure can be prepared at the two poles of the yin and yang in one step, without subsequent modification process, high production efficiency and low production cost Low.

Description

technical field [0001] The invention belongs to the field of functional chemical materials, and in particular relates to a one-step method for preparing a superhydrophilic / underwater superoleophobic oil-water separation membrane and a method. Background technique [0002] In recent years, oil spills and the discharge of a large amount of oily wastewater have caused serious water pollution, and the separation of water-oil mixture has become a severe challenge. Inspired by the special wettability of the lotus leaf surface and using the concept of bionics, more and more researchers have designed superwetting materials and used them for oil-water separation. The principle of superwetting materials for oil-water separation is that the surface of the material has different permeability to water and oil, including hydrophobic and oleophilic materials and hydrophilic and oleophobic materials. Preparation methods include inorganic nanostructure growth method, layer-by-layer self-ass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022C25D3/12
CPCB01D17/0202C25D3/12
Inventor 张延宗缑晓丹喻溪亭罗孟帆刘燕
Owner SICHUAN AGRI UNIV
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