Rapid preparation method and application of efficient oil-water separation membrane

An oil-water separation membrane and high-efficiency technology, which is applied in the field of rapid preparation of high-efficiency oil-water separation membranes, can solve the problems of long membrane preparation time and large-scale industrial production problems, and achieves a time-saving and labor-saving, good mechanical performance and rapid membrane preparation. Effect

Pending Publication Date: 2022-01-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, most of the oil-water separation membranes in the existing inventions often take a long time to make membranes, involve dangerous reagents or have certain risks in the preparation process, which cause great troubles for large-scale industrial production

Method used

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  • Rapid preparation method and application of efficient oil-water separation membrane
  • Rapid preparation method and application of efficient oil-water separation membrane
  • Rapid preparation method and application of efficient oil-water separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A rapid preparation method of a high-efficiency oil-water separation membrane, comprising the steps of:

[0028] (1) Wash the 400-mesh phosphorus copper mesh with acetone, ethanol, and ultrapure water for 20 minutes under ultrasonic conditions to remove surface oil, and dry it at 60°C for later use;

[0029] (2) Weigh 0.8g of polyvinylidene fluoride and dissolve it in 10mL of N,N-dimethylformamide, and magnetically stir for 8 hours at room temperature to obtain a homogeneously dissolved polyvinylidene fluoride modified solution;

[0030] (3) Cut the phosphor copper omentum into a size of 5cm*5cm, squeeze out 1.5ml of the modified solution from the needle tube to one side of the omentum, scrape it evenly with a scraper, turn the omentum over and repeat the coating once (no need for another modified solution), and dried at 50°C to obtain the oil-water separation omentum.

[0031] The surface topography scanning electron microscope photo of the oil-water separation omentu...

Embodiment 2

[0034] A rapid preparation method of a high-efficiency oil-water separation membrane, comprising the steps of:

[0035] (1) Wash the 500-mesh stainless steel mesh with acetone, ethanol, and ultrapure water for 20 minutes under ultrasonic conditions to remove the oil on the surface, and dry it at 60°C for later use;

[0036] (2) Weigh 0.6g of polyvinylidene fluoride and 0.32g of polyvinylidene fluoride copolymerized hexafluoropropylene and dissolve them in a mixture of 6mL N,N-dimethylformamide and 4mL of acetone, stir magnetically at room temperature for 8h, and obtain a uniform solution Polyvinylidene fluoride and polyvinylidene fluoride copolymer hexafluoropropylene modified solution;

[0037] (3) Cut the stainless steel omentum into a size of 5cm*5cm, squeeze 1ml of the modified solution from the needle tube to one side of the omentum, scrape it evenly with a scraper, turn the omentum over and repeat it once (no additional modification is required) solution), and the oil-w...

Embodiment 3

[0041] A rapid preparation method of a high-efficiency oil-water separation membrane, comprising the steps of:

[0042] (1) Wash the 450-mesh nylon mesh with acetone, ethanol, and ultrapure water for 20 minutes under ultrasonic conditions to remove oil stains on the surface, and dry it at 60°C for later use;

[0043] (2) Weigh 0.72g of polyvinylidene fluoride copolymerized hexafluoropropylene and dissolve it in 10mL of N, N-dimethylformamide, stir magnetically at room temperature for 8 hours to obtain a homogeneously dissolved polyvinylidene fluoride copolymerized hexafluoropropylene modified solution ;

[0044] (3) Cut the nylon omentum into a size of 5cm*5cm, take 1.2ml of modified solution and extrude it onto one side of the omentum, apply it evenly with a brush, turn the omentum over and repeat it once (no additional modification is required) solution), and the oil-water separation omentum was obtained after drying at 50°C.

[0045] The contact angle of the oil-water sep...

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Abstract

The invention discloses a rapid preparation method and application of an efficient oil-water separation membrane, and belongs to the field of material surface modification. The preparation method comprises the following steps: (1) carrying out deoiling and decontamination cleaning on the surface of a solid net film; and (2) weighing a hydrophobic polymer material, dissolving the hydrophobic polymer material in a solvent, magnetically stirring at room temperature for 6-8 hours to obtain a uniform modified solution, uniformly coating the pretreated solid net film with the uniform modified solution, and drying. Construction of a solid net film surface micro-nano structure and surface hydrophobic modification are combined into the same system, the overall hydrophobic and oleophylic effects of the material are improved, the material is low in price and easy to obtain, the preparation process is simple and rapid, hazardous reagents such as toxic, high-corrosivity and high-oxidation-reduction reagents are not involved in the preparation process, and the method is suitable for large-scale industrial production; and an oil-water separation net film can realize efficient separation of an oil-water mixture, is high in mechanical property, can well realize self-supporting, and can be freely cut into a required shape during application.

Description

technical field [0001] The invention relates to the technical field of material surface modification, in particular to a rapid preparation method and application of a high-efficiency oil-water separation membrane. Background technique [0002] With the development of industry and the change of people's lifestyle, the discharge of industrial oily wastewater and domestic oily wastewater is increasing, endangering people's healthy life. As a result, oil-water separation technology has gradually attracted people's attention, and has become a technical challenge related to all mankind. [0003] At present, a variety of oil-water separation technologies have been extensively researched and developed, including sol-gel method, etching method, electrochemical method, plasma treatment method, etc. These methods have achieved good results, but they all exist to varying degrees The disadvantages of complicated process and high production cost are unfavorable for industrialized product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D61/38C02F1/40C02F1/44
CPCB01D67/0002B01D67/0079B01D69/02B01D61/38C02F1/40C02F1/44B01D2325/24B01D2325/38
Inventor 潘凯李丹邓建平赵彪
Owner BEIJING UNIV OF CHEM TECH
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