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Preparation method and application of oil-water separation net membrane

An oil-water separation mesh membrane, copper mesh technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve problems such as complex methods, harsh coating preparation conditions, and easy blocking of mesh holes, and achieve good application prospects. Effect

Inactive Publication Date: 2018-11-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation conditions of this coating are harsh and the method is complicated. It is more suitable to use glass as the substrate, and it is not suitable to use the omentum as the substrate. The super-oleophobic and super-hydrophilic material prepared by spraying this coating on the omentum is easy to block. , there is still a certain distance in the application of oil-water separation

Method used

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  • Preparation method and application of oil-water separation net membrane
  • Preparation method and application of oil-water separation net membrane
  • Preparation method and application of oil-water separation net membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Clean the 400-mesh red copper mesh with ultrasonic in acetone, absolute ethanol and deionized water in sequence, and then clean it with dilute hydrochloric acid with a mass concentration of 3.65% to remove the surface oxide film. After cleaning, use N 2 blow dry;

[0031] 2) 1.69g AgNO 3 Dissolve in 500mL of deionized water to prepare AgNO 3 solution; take 0.2mL ammonia water drop by drop into 500mLAgNO 3 solution, and then place the solution in an ultrasonic cleaner for 200W ultrasonic dispersion for 5 minutes until completely dissolved to obtain a silver ammonia solution for use; wherein the ammonia water is a commercially available product with a mass concentration of 25% to 28%.

[0032] 3) Put the copper mesh treated in step 1) into the silver ammonia solution for 75 seconds and take it out to obtain a superhydrophilic / underwater superoleophobic mesh, and prepare the superhydrophilic / underwater superoleophobic mesh Dry in a constant temperature drying oven at...

Embodiment 2

[0036] 1) Clean the 400-mesh red copper mesh with ultrasonic in acetone, absolute ethanol and deionized water in sequence, and then clean it with dilute hydrochloric acid with a mass concentration of 3.65% to remove the surface oxide film. After cleaning, use N 2 blow dry;

[0037] 2) 1.69g AgNO 3 Dissolve in 500mL of deionized water to prepare AgNO 3 solution; take 0.2mL ammonia water dropwise into 500mL AgNO 3 solution, and then place the solution in an ultrasonic cleaner for 200W ultrasonic dispersion for 5 minutes until completely dissolved to obtain a silver ammonia solution for use;

[0038] 3) Put the copper mesh treated in step 1) into the silver ammonia solution for 75 seconds and take it out to obtain a superhydrophilic / underwater superoleophobic mesh, and prepare the superhydrophilic / underwater superoleophobic mesh Dry in a constant temperature drying oven at 90°C for 3 hours to obtain an oil-water separation omentum;

[0039] 4) Roll the sponge wrapped in the p...

Embodiment 3

[0042] 1) Clean the 400-mesh red copper mesh in acetone, absolute ethanol and deionized water in sequence, and then clean it with dilute hydrochloric acid with a mass concentration of 3.65% to remove the surface oxide film. After cleaning, use N 2 blow dry;

[0043] 2) 1.69g AgNO 3 Dissolve in 500mL of deionized water to prepare AgNO 3 solution; take 0.2mL ammonia water dropwise into 500mL AgNO 3 solution, and then place the solution in an ultrasonic cleaner for 200W ultrasonic dispersion for 5 minutes until completely dissolved to obtain a silver ammonia solution for use;

[0044]3) Put the copper mesh treated in step 1) into the silver ammonia solution for 75 seconds and take it out to obtain a superhydrophilic / underwater superoleophobic mesh, and prepare the superhydrophilic / underwater superoleophobic mesh Dry in a constant temperature drying oven at 90°C for 3 hours to obtain an oil-water separation omentum;

[0045] 4) Roll the sponge wrapped in the prepared oil-water...

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Abstract

A preparation method and application of an oil-water separation net membrane are disclosed; the oil-water separation net membrane is prepared by ultrasonic cleaning of a 400 mesh red copper mesh in turn in acetone, absolute ethanol and deionized water, then immersion in hydrochloric acid to remove a surface oxide film, washing and drying by blowing with N2; immersion in a silver ammonia solution and drying. A micro-nano structure is formed on the surface of the copper mesh by impregnating the copper mesh with the oxide film removed in the silver ammonia solution, the water wettability of the surface of the structure is changed from hydrophobic to super-hydrophilic, and the oil wettability of the surface of the structure is changed from oleophobic to super-lipophilic, so that the oleophobicand hydrophilic function can be realized. Because of good oleophobicity and hydrophilicity, the oil-water separation net membrane can be successfully applied in oil-water separation. The oleophobic hydrophilic material has a very good application prospect in oil pollution prevention and oil sewage treatment.

Description

technical field [0001] The invention relates to a preparation method and application of an oil-water separation omentum. Background technique [0002] Wettability is a common phenomenon in nature, and people's research on wetting properties comes from nature. BarthlottW et al. found that water droplets are easy to roll off on the surface of lotus leaves and the self-cleaning effect of lotus leaves. This phenomenon is called superhydrophobic phenomenon. Since the discovery of superhydrophobic phenomenon and the preparation of more and more biomimetic superhydrophobic surfaces, people are also constantly studying superoleophobic surfaces. How to achieve super-oleophobic and super-hydrophilic at the same time in the air is also a difficult problem in scientific research. Zhang et al. of the Chinese Academy of Sciences prepared a new type of coating material with superhydrophilic and superoleophobic properties by spray casting, which can prevent the hydrophilic surface from be...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/0202
Inventor 齐宝金魏进家袁甲崔晨乙
Owner XI AN JIAOTONG UNIV
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