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Super-hydrophobic super-lipophilic emulsion separating mesh membrane, and production method and application thereof

A technology of emulsion separation and super lipophilicity, which is applied in separation methods, immiscible liquid separation, liquid separation, etc. It can solve the problems of complex preparation process of fluorine-containing compounds, cumbersome preparation process, and unsuitability for large-scale production.

Inactive Publication Date: 2015-08-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese invention patent applications with application numbers 200510040447.2 and 01118387.X respectively disclose the preparation of a superhydrophobic and superoleophilic oil-water separation membrane. Although both have the effect of oil-water separation, the disadvantage is that they use fluorine-containing compound and the preparation process is more complex
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 super-lipophilic emulsion separating mesh membrane, and production method and application thereof
  • Super-hydrophobic super-lipophilic emulsion separating mesh membrane, and production method and application thereof
  • Super-hydrophobic super-lipophilic emulsion separating mesh membrane, and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, prepare superhydrophobic superlipophilic emulsion separation omentum and emulsion separation effect:

[0049] (1) Soak the 1000-mesh stainless steel mesh in a mixed solution of ethanol and acetone (1:1 by volume) and ultrasonically clean it for 15 minutes, and dry it at room temperature;

[0050] (2) At room temperature, in a 250ml beaker, add 240ml of water, 0.48g of dopamine hydrochloride and 0.96g of trishydroxymethylaminomethane, magnetically stir and mix uniformly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride 0.20%, the mass percentage of trishydroxymethylaminomethane is 0.40%, and the pH value of the solution is 8.5;

[0051] (3) Soak the stainless steel net 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;

[0052](4) At room temperature, add 270ml of ethanol, 4.3g of tetraethylo...

Embodiment 2

[0058] Embodiment 2, preparation superhydrophobic superlipophilic emulsion separation omentum and emulsion separation effect:

[0059] (1) Soak the 600-mesh stainless steel mesh in a mixed solution of ethanol and acetone (1:1 by volume) and ultrasonically clean it for 15 minutes, and dry it at room temperature;

[0060] (2) At room temperature, in a 250ml beaker, add 240ml of water, 0.24g of dopamine hydrochloride and 0.96g of tris, magnetically stir and mix uniformly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride 0.60%, the mass percentage of trishydroxymethylaminomethane is 0.40%, and the pH value of the solution is 8.5;

[0061] (3) Soak the dried stainless steel net in step (1) in the mixed solution obtained in step (2), place it at room temperature for 24 hours, take it out, rinse it with deionized water, and dry it naturally;

[0062] (4) At room temperature, add 270ml of ethanol, 2.2g of tetraethylorthosilicate, 4.2g of...

Embodiment 3

[0066] Embodiment 3, prepare superhydrophobic superlipophilic emulsion separation omentum and emulsion separation effect:

[0067] (1) Soak the 800-mesh stainless steel mesh in a mixed solution of ethanol and acetone (1:1 by volume) and ultrasonically clean it for 15 minutes, and dry it at room temperature;

[0068] (2) At room temperature, in a 250ml beaker, add 240ml of water, 1.44g of dopamine hydrochloride and 0.96g of tris, magnetically stir and mix uniformly to obtain a mixed solution. In the mixed solution, the mass percentage of dopamine hydrochloride is 0.10%, the mass percentage of trishydroxymethylaminomethane is 0.74%, and the pH value of the solution is 8.5;

[0069] (3) Soak the dried stainless steel net in step (1) in the mixed solution obtained in step (2), place it at room temperature for 24 hours, take it out, rinse it with deionized water, and dry it naturally;

[0070] (4) At room temperature, add 270ml of ethanol, 7.5g of tetraethylorthosilicate, 1.0g of ...

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Abstract

The invention discloses a super-hydrophobic super-lipophilic emulsion separating mesh membrane, and a production method and an application thereof. The method comprises the following steps: 1, dissolving dopamine hydrochloride and tris(hydroxymethyl)aminomethane in water, and uniformly stirring to obtain a mixed solution A; 2, dipping a fabric net in the mixed solution A, and carrying out a reaction 1 to obtain a polydopamine membrane modified fabric net; 3, dissolving a siloxane precursor, a silane coupling agent 1, a silane coupling agent 2 and a titanium dioxide precursor in an organic solvent, and uniformly stirring to obtain a mixed solution 2; and 4, taking out the fabric net in step 2, washing, dipping the washed fabric net in the mixed solution B, adding water and ammonia water, and carrying out a reaction 2 to obtain the emulsion separating mesh membrane. The emulsion separating mesh membrane has the advantages of non-toxicity, harmlessness, environmental protection, easy cleaning and preservation, repeated use and good stability, can be widely used in separation of oil-water emulsions, and has a good separating effect.

Description

technical field [0001] The invention belongs to the field of surface modification of solid materials, and in particular relates to a superhydrophobic and superoleophilic emulsion separation membrane, a preparation method and application thereof. Background technique [0002] Due to the massive discharge of domestic sewage and industrial wastewater, and the frequent occurrence of offshore oil spill accidents, oil-water separation has always been the research focus of scientists. At this stage, most of the oil-water separation membranes prepared with special wettability are used for the primary separation of simple oil-water mixtures (mainly oil-water mixtures that can be stratified independently). In the actual oil-water mixture, there is usually a large amount of surfactant, so the oil-water mixture exists in the form of emulsion. Therefore, finding an omentum that can effectively demulsify emulsions and simultaneously separate oil and water has become a very important issu...

Claims

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Application Information

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IPC IPC(8): B01D17/04B01D17/022
Inventor 冯琳曹莹泽陈雨宁刘娜
Owner TSINGHUA UNIV
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