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Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof

An oil-water separation omentum membrane, underwater superoleophobic technology, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of unsuitable separation, high-temperature curing, complicated manufacturing process, etc., and achieves low preparation cost, Good stability and fast oil-water separation

Inactive Publication Date: 2011-04-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the four technical schemes all have the effect of oil-water separation, they also have different deficiencies. For example, the manufacturing process is relatively complicated, some use fluorine-containing compounds, and some require high-temperature curing, which is not suitable for large amounts of water containing a small amount of oil. Separation of oil-water mixture, etc.

Method used

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  • Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof
  • Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof
  • Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) immerse the 300-mesh stainless steel wire mesh respectively in ethanol and acetone for ultrasonic cleaning for 5 minutes, and dry at room temperature;

[0040] (2) At room temperature, add 20ml of water, 6g of acrylamide, 0.24g of N,N'-methylenebisacrylamide, 0.1g of polyacrylamide and 0.18g of 2,2-diethoxy Acetophenone was mixed evenly by magnetic stirring to obtain a mixed solution;

[0041] (3) uniformly coating the mixed solution obtained in step (2) on the surface of the stainless steel wire mesh after step (1) is dried;

[0042] (4) With a wavelength of 365nm ultraviolet light source irradiation step (3) coated stainless steel wire mesh mixed solution for 90 minutes, so that the acrylamide monomer and N, N'-methylenebisacrylamide crosslinking agent in the initiator Under the effect of 2,2-diethoxyacetophenone, cross-linking polymerization occurs, and a polyacrylamide hydrogel layer with a thickness of 2 microns (such as Figure 1a shown), on the polyacrylamid...

Embodiment 2

[0046] (1) The 100-mesh copper grid was respectively immersed in ethanol and acetone for ultrasonic cleaning for 5 minutes, and dried at room temperature;

[0047] (2) At room temperature, add 20ml of water, 5.5g of acrylic acid, 0.1g of N,N'-methylenebisacrylamide, 0.15g of polyvinyl alcohol and 0.15g of 2,2-diethoxybenzene into a 50ml Erlenmeyer flask Ethyl ketone, mixed evenly by magnetic stirring;

[0048] (3) uniformly coating the mixed solution obtained in step (2) on the copper mesh surface after step (1) dries;

[0049] (4) irradiating step (3) with an ultraviolet light source with a wavelength of 365nm on the copper grid coated with the mixed solution for 60 minutes, so that the acrylic acid monomer and N, N'-methylenebisacrylamide crosslinking agent are in the initiator 2, Under the action of 2-diethoxyacetophenone, cross-linking polymerization occurs, and a polyacrylic acid hydrogel layer with a thickness of 9.5 microns is formed on the surface of the copper wire o...

Embodiment 3

[0053] (1) 400-mesh nylon nets were respectively immersed in ethanol and acetone for ultrasonic cleaning for 5 minutes, and dried at room temperature;

[0054] (2) At room temperature, add 20ml of water, 13g of N-ethylacrylamide, 0.21g of N,N'-methylenebisacrylamide, 0.09g of polyvinylpyrrolidone and 0.3g of 2,2-bisacrylamide into a 50ml Erlenmeyer flask Ethoxylated acetophenone, mixed evenly by magnetic stirring.

[0055] (3) uniformly coating the mixed solution obtained in step (2) on the surface of the nylon mesh after step (1) is dried;

[0056] (4) Irradiating step (3) with a UV light source with a wavelength of 365nm on the copper grid coated with the mixed solution for 100 minutes to make N-ethylacrylamide monomer and N, N'-methylenebisacrylamide crosslinking agent Under the action of the initiator 2,2-diethoxyacetophenone, cross-linking polymerization occurs, and a poly N-ethylacrylamide hydrogel layer with a thickness of 1.5 microns is formed on the surface of the ny...

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Abstract

The invention relates to an underwater super-oleophobic oil-water separation mesh membrane as well as a preparation method and application thereof. A 100-140-mesh fabric mesh is used as the substrate of the oil-water separation mesh membrane; and a hydrogel cladding layer is formed by the crosslinking polymerization of polymer monomers on the mesh wires of the fabric mesh by a photo-initiated polymerization method, thus obtaining the mesh membrane provided by the invention. The oil-water separation mesh membrane is super-hydrophilic in air and underwater and super-oleophobic underwater; the contact angle with oil drops underwater is greater than 150 degrees; and the adhesion to oil drops is low. The mesh membrane provided by the invention can be applied to oil-containing sewage treatment, chemical separation, environmental protection and the like. For oil-water separation, the mesh membrane has the advantages of good separation effect, fast separation, low cost, low energy consumption, convenience, no other chemical additive and the like, and is easy to recover for multiple recycling, and suitable for wide-range preparation.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and functional materials, and particularly relates to an oil-water separation omentum with superhydrophilic and underwater superoleophobic properties, a preparation method and application thereof. Background technique [0002] Oil-water separation is a work of great significance in production and life. According to the content of oil and water, it can be roughly divided into two categories: oily sewage and watery waste oil. Oily sewage comes from a wide range of sources, such as oil spills, ship ballast water, land The exploitation of petroleum ore in the world, as well as many industries such as food, textile, mechanical processing, and tanning, will discharge a large amount of oily sewage into the environment. Oily sewage endangers human health and safety, pollutes the environment, and even destroys ecological balance. So how to find a simple and efficient method to deal with these...

Claims

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Application Information

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IPC IPC(8): B01D17/022
Inventor 薛众鑫刘明杰王树涛宋延林江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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