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Preparation method of oil-water separation omentum with underwater ultra oleophobicity

An oil-water separation omentum membrane, underwater superoleophobic technology, applied in separation methods, liquid separation, chemical instruments and methods, etc. Repeated use and other problems, to achieve the effect of fast oil-water separation, enhanced hydrophilicity, simple equipment and manufacturing process

Inactive Publication Date: 2017-08-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil-water separation membrane obtained by this method is superhydrophobic and superoleophilic, but because the lipophilic membrane is particularly easy to be polluted or even blocked, especially high-viscosity oil will seriously affect the separation efficiency, and the adhered oil is difficult to remove, resulting in Secondary pollution in the post-treatment process, the omentum is not easy to reuse
At the same time, the manufacturing process of this method is relatively complicated, and it is not easy to produce in a large area and at low cost.

Method used

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  • Preparation method of oil-water separation omentum with underwater ultra oleophobicity
  • Preparation method of oil-water separation omentum with underwater ultra oleophobicity
  • Preparation method of oil-water separation omentum with underwater ultra oleophobicity

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Experimental program
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Effect test

Embodiment 1

[0032] (1) immerse a 1000-mesh (15-micron aperture) stainless steel mesh (20 cm × 20 cm) in acetone, isopropanol and deionized water for 10 minutes, and then dry it at room temperature;

[0033] (2) At room temperature, add 25ml of water, 6.5g of acrylamide, 1g of titanium dioxide (28 nanometers in particle size), 0.35g of N, N'-methylenebisacrylamide, 0.15g of polyacrylamide and 0.18 g of 2,2-diethoxyacetophenone, magnetically stirred and mixed uniformly to obtain a mixed solution;

[0034] (3) uniformly coating the mixed solution obtained in step (2) on the surface of the stainless steel mesh after step (1) is dried;

[0035] (4) With a wavelength of 365nm and an optical energy density of 1350mJ / cm 2 , the irradiation distance is 20cm ultraviolet light source irradiation step (3) the stainless steel net coated with the mixed solution for 95 minutes, so that the acrylamide monomer and N, N'-methylenebisacrylamide cross-linking agent in the initiator 2, 2 -Cross-linked polym...

Embodiment 2

[0039] (1) immerse a 800-mesh (19 micron aperture) copper grid (20 cm × 20 cm) in acetone, isopropanol and deionized water for 10 minutes, and then dry it at room temperature;

[0040] (2) At room temperature, add 25ml of water, 5.7g of acrylic acid, 1g of zinc oxide (25nm in particle size), 0.5g of silicon dioxide (38nm in particle size), N,N'-methylene 0.15g of bisacrylamide, 0.17g of polyvinyl alcohol and 0.15g of 2,2-diethoxyacetophenone were 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 copper mesh after step (1) dries;

[0042] (4) With a wavelength of 365nm and an optical energy density of 1300mJ / cm 2 , the irradiation distance is 5cm UV light source irradiation step (3) Copper mesh coated with the mixed solution for 85 minutes, so that the acrylic acid monomer and N, N'-methylenebisacrylamide crosslinking agent in the initiator 2, 2- Under the action of dietho...

Embodiment 3

[0046] (1) A 400-mesh nylon mesh (20 cm x 20 cm) was immersed in acetone, isopropanol and deionized water for 10 minutes, and then dried at room temperature;

[0047] (2) At room temperature, add 25ml of water, 15g of N-ethylacrylamide, 1g of zinc oxide (58nm in particle size), 0.5g of calcium carbonate (29nm in particle size), and 0.5g of silicon dioxide in a 50ml Erlenmeyer flask at room temperature (particle size 68 nanometers), N, N'-methylenebisacrylamide 0.25g, polyvinylpyrrolidone 0.16g and 2,2-diethoxyacetophenone 0.3g, magnetically stirred and mixed uniformly to obtain a mixed solution;

[0048] (3) uniformly coating the mixed solution obtained in step (2) on the surface of the nylon mesh after step (1) is dried;

[0049] (4) With a wavelength of 365nm and an optical energy density of 1200mJ / cm 2 , the irradiation distance is 15cm ultraviolet light source irradiation step (3) the nylon net coated with the mixed solution for 100 minutes, so that the N-ethylacrylamide ...

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Abstract

The invention relates to a preparation method of an oil-water separation omentum with underwater ultra oleophobicity. The method comprises the steps that by using a woven fiber net of 400-2000 mesh as the substrate, and combining the inorganic nano particles with hydrogel, the surface roughness of the hydrogel is improved to enhance the surface hydrophilicity of the omentum; by using the method of photo polymerization, the meshes of the woven fiber net are coated with a hydrogel coating layer which has a nanocomposite structure and is formed with cross-linked polymer and inorganic nanoparticles, and then the oil-water separation omentum with underwater ultra oleophobicity is obtained. The oil-water separation omentum prepared by the method has the advantages of a large water flux, a fast speed of oil-water separation, and no need to modify the woven fiber net.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and functional materials, and in particular relates to a preparation method and application of an oil-water separation omentum with superhydrophilic and superoleophobic properties. Background technique [0002] In recent years, with the rapid development of industry, the scale of oilfield exploitation has been continuously expanded, and the oily wastewater generated by factory production has also been increasing. Oil-water separation has become a problem closely related to people's life, economic development and environmental protection. On the one hand, food processing, metal smelting, petrochemical, textile and other fields produce a large amount of industrial oily wastewater, which will cause very serious pollution to the environment; Seriously, this will also cause greater pollution to the marine environment. Therefore, how to achieve high-efficiency and low-cost separation of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C02F1/40
CPCB01D17/0202C02F1/40
Inventor 张旭张佳王小梅
Owner HEBEI UNIV OF TECH
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