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Super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and preparation method and application thereof

An oil-water separation omentum and underwater super-oleophobic technology, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of poor water resistance of the omentum, achieve large water flux, no toxic side effects and secondary Second pollution, fast effect

Inactive Publication Date: 2013-09-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the film-forming substances used in these two patents are completely water-soluble polymers, resulting in poor water resistance of the omentum.

Method used

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  • Super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and preparation method and application thereof
  • Super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and preparation method and application thereof
  • Super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: polyvinyl alcohol-polyacrylic acid / nanometer SiO 2 Preparation of stainless steel wire mesh oil-water separation mesh

[0035] (1) Put a piece of 15×15mm 2 The 300-mesh stainless steel wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W and 40KHz for 8min, and hung up to dry at room temperature;

[0036] (2) Add 180g of hot water at 95°C to a 500ml beaker, add 20g of polyvinyl alcohol and polyacrylic acid in a mass ratio of 1:1, stir well while heating under magnetic stirring, and then set aside to cool naturally to room temperature;

[0037](3) Add 50g of tetraethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-neck flask, heat in a constant temperature water bath at 35°C and keep stirring. After stirring evenly, weigh 0.5g of Add ammonia water to 30g of deionized water, drop it into a four-neck flask with a constant flow pump at a rate of...

Embodiment 2

[0043] Embodiment 2: polyethylene glycol-urethane acrylate / nanometer SiO 2 Preparation of Copper Mesh Oil-Water Separation Mesh

[0044] (1) Put a piece of 15×15mm 2 The 100-mesh copper wire mesh was immersed in distilled water, ethanol, and distilled water in order, respectively, cleaned at 100W and 20KHz for 10min, and hung up to dry at room temperature;

[0045] (2) Add 180g of hot water at 95°C to a 500ml beaker, add 20g of polyethylene glycol and urethane acrylate in a mass ratio of 1:5, stir well while heating under magnetic stirring, then set aside and naturally cool to room temperature ;

[0046] (3) Add 50g of tetraethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-neck flask, heat in a constant temperature water bath at 80°C and keep stirring. After stirring evenly, weigh 0.5g of Add hydrochloric acid to 30 g of deionized water, drop it into a four-neck flask with a constant flow pump at a rate of 1 ml / min, keep warm for 4 hours, and dis...

Embodiment 3

[0052] Embodiment 3: Polydimethyldiallylammonium chloride-polyacrylic acid / nanometer SiO 2 Preparation of Aluminum Mesh Oil-Water Separation Mesh

[0053] (1) Put a piece of 15×15mm 2 The 200-mesh aluminum wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W and 40KHz for 10min, and hung up to dry at room temperature;

[0054] (2) Add 180g of deionized water into a 500ml beaker, add 20g of PAA-g-PDDA block copolymer, and stir well under magnetic stirring;

[0055] (3) Add 50g of tetramethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-neck flask, heat in a constant temperature water bath at 35°C and keep stirring. After stirring evenly, weigh 0.5g of Sodium bicarbonate, add 30g deionized water, drop in the four-neck flask with the speed of 1.5ml / min with the constant flow pump, after keeping warm for 5h, discharge the material to prepare the nano-silica sol wit...

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Abstract

The invention discloses a super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and a preparation method and an application thereof. According to the method, fabric mesh with a specification of 100-300 meshes is subjected to ultrasonic cleaning, and is air-dried under normal temperature; a hydrophilic polymer water-sensitive agent and a cross-linking agent are dissolved in water according to a ratio of 1:9-9:1; the mixture is well mixed by magnetic stirring, such that a solution with a concentration of 1-99% is prepared; nano-sol is prepared with a sol-gel method; the solution and the nano-sol are prepared into a mixed solution with a concentration of 1-99%, and the solution is well dispersed through ultrasonic dispersion; the mesh is soaked in the mixed solution and is vertically lifted, or the mesh is directly sprayed by using a high-pressure spraying gun; and the mesh is bake-dried, such that the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane is obtained. Contact angles of the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane with water and oil in air are both 0 DEG, and the membrane is super-hydrophilic. Under water, the contact angle of the membrane with oil drops is larger than 150 DEG, and the membrane has an oil drop low adhesion characteristic. The mesh membrane provided by the invention can be used in oil-water mixture separation and oil-containing sewage processing.

Description

technical field [0001] The invention relates to an oil-water separation membrane, in particular to an oil-water separation omentum with air superamphiphilic and underwater superoleophobic properties, a preparation method and application thereof, and belongs to the technical field of organic-inorganic hybrid nano functional materials. Background technique [0002] It is reported that about 3.2 billion cubic tons of oil enters the water body every year to form oily sewage. Oily sewage comes from a wide range of sources. In industries such as petroleum, chemical industry, steel, coking, gas generation stations, machinery manufacturing and food processing, all water that is in direct contact with oil contains oil. Oil is divided into polar oil and non-polar oil. Polar oil comes from animals and is biodegradable; non-polar oil comes from petroleum and other mineral resources and is difficult to biodegrade. Oil floats on the surface of the sea and spreads rapidly to form an airti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C02F1/40
Inventor 涂伟萍袁腾王锋胡剑青
Owner SOUTH CHINA UNIV OF TECH
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