Super-hydrophobic and super-oleophylic oil-water separating mesh membrane and preparation method thereof

An oil-water separation omentum membrane and super-lipophilic technology, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of cumbersome preparation process, complicated preparation process of fluorine-containing compounds, and unsuitable for large-scale production. The effect of low preparation cost, high water bearing pressure and fast speed

Active Publication Date: 2013-03-13
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Application numbers: 200510040447.2 and 01118387.X Chinese invention patent applications respectively disclose a superhydrophobic and superoleophilic oil-water separation membrane, both of which have the effect of oil-water separation, but the disadvantages are the use of fluorine-containing compounds and the preparation process more complicated
The preparation process of this invention patent is too cumbersome and not suitable for large-scale production

Method used

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  • Super-hydrophobic and super-oleophylic oil-water separating mesh membrane and preparation method thereof
  • Super-hydrophobic and super-oleophylic oil-water separating mesh membrane and preparation method thereof
  • Super-hydrophobic and super-oleophylic oil-water separating mesh membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, preparation superhydrophobic superoleophilic oil-water separation omentum

[0028] (1) Soak the 400-mesh stainless steel mesh in a mixed solution of ethanol and acetone (volume ratio: 1:1) and ultrasonically clean it for 15 minutes, then dry it at room temperature;

[0029] (2) At room temperature, add 60ml of water, 0.12g of dopamine hydrochloride and 0.24g of trishydroxymethylaminomethane into a 100ml beaker, stir and mix evenly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride is 0.20%, and the mass percentage of trishydroxymethylaminomethane is 0.40%;

[0030] (3) Soak the stainless steel mesh dried in step (1) in the mixed solution obtained in step (2), place it at room temperature for 48 hours, take it out, rinse it with deionized water, and dry it naturally;

[0031] (4) At room temperature, add 60ml of water, 2.54g of n-dodecanethiol and 0.6g of sodium hydroxide into a 100ml beaker, and obtain a mixed...

Embodiment 2

[0036] Embodiment 2, prepare superhydrophobic superoleophilic oil-water separation omentum

[0037] (1) Soak the 280-mesh stainless steel mesh in a mixed solution of ethanol and acetone (volume ratio 1:1) and ultrasonically clean it for 15 minutes, then dry it at room temperature;

[0038] (2) At room temperature, add 60ml of water, 0.06g of dopamine hydrochloride and 0.20g of trishydroxymethylaminomethane into a 100ml beaker, stir and mix evenly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride is 0.10%, and the mass percentage of trishydroxymethylaminomethane is 0.33%;

[0039] (3) Soak the stainless steel mesh dried in step (1) in the mixed solution obtained in step (2), and after standing at room temperature for 24 hours, take it out, rinse it with deionized water, and dry it naturally;

[0040] (4) At room temperature, add 60ml of water, 3.60g of n-octathiol and 0.6g of sodium hydroxide into a 100ml beaker, and obtain a mixe...

Embodiment 3

[0045] Embodiment 3, prepare superhydrophobic superoleophilic oil-water separation omentum

[0046] (1) Soak the 120-mesh copper grid in a mixed solution of ethanol and acetone (volume ratio 1:1) and ultrasonically clean it for 15 minutes, then dry it at room temperature;

[0047] (2) At room temperature, add 60ml of water, 0.36g of dopamine hydrochloride and 0.45g of trishydroxymethylaminomethane into a 100ml beaker, stir and mix evenly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride is 0.59%, and the mass percentage of trishydroxymethylaminomethane is 0.74%;

[0048] (3) Soak the stainless steel mesh dried in step (1) in the mixed solution obtained in step (2), and place it at room temperature for 36 hours, take it out, rinse it with deionized water, and dry it naturally;

[0049] (4) At room temperature, add 60ml of water, 2.54g of n-dodecanethiol and 0.6g of sodium hydroxide into a 100ml beaker, and obtain a mixed suspensio...

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Abstract

The invention discloses a super-hydrophobic and super-oleophylic oil-water separating mesh membrane and a preparation method thereof. The method comprises the following steps of: (1), cleaning a fabric mesh and drying the cleaned fabric mesh; (2), dissolving dopamine hydrochloride and trihytdroxy methyl-aminomethane to water to acquire a mixed solution, wherein the pH value of the mixed solution is 8.0-12.0; (3), soaking the dried fabric mesh in the mixed solution, and then getting out the soaked fabric mesh for drying; (4), dissolving mercaptan compound and sodium hydroxide in water to acquire mixed turbid liquid; (5), soaking the fabric mesh acquired in the step (3) in the mixed turbid liquid, reacting the mixture to acquire the oil-water separating mesh membrane. The oil-water separating mesh membrane disclosed by the invention has high bearing pressure to water so that oil can quickly pass, a separating effect is good, the speed is high, and the separating effect on normal hexane, petroleum ether, benzene, gasoline, diesel oil, animal and vegetable oil, crude oil and the like is good. The oil-water separating mesh membrane is non-toxic and harmless, environment-friendly, easy to clean and keep, can be reusable, and has good stability.

Description

technical field [0001] The invention relates to a superhydrophobic and superoleophilic oil-water separation mesh and a preparation method thereof, belonging to the field of surface modification of solid materials. Background technique [0002] Oil-water separation is of great significance in actual life and production, and the content of water and impurities in oil also has an impact that cannot be ignored on oil products. Therefore, how to find a simple and efficient method for treating water in oil and separate oil from water has become an important issue. [0003] Application numbers: 201110094312.X and 201110420531.2 Chinese invention patent applications, respectively disclose the method of using dopamine polymerization to modify the surface modification, which are used to improve the tribological properties of silicon-based thin films and improve the solid phase microextraction coating. Surface wettability and oil-water separation studies. [0004] Application numbers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
Inventor 冯琳曹莹泽陶磊张小勇危岩
Owner TSINGHUA UNIV
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