UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and application thereof

A technology of oil-water separation omentum and super-oleophobic oil, which is applied in the field of water-based UV-curable coatings, can solve the problems of poor water resistance of the omentum, and achieve the effect of large water flux, low energy consumption for material transfer, and no secondary pollution

Inactive Publication Date: 2013-10-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the film-forming substances used in these two patents are complete

Method used

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  • UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and application thereof
  • UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and application thereof
  • UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and application thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0033] Example 1: Water-based UV curing oligomer / nano-SiO 2 Preparation of oil-water separation membrane of stainless steel wire mesh

[0034] (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, 40KHz for 8 minutes, and hung it to dry at room temperature;

[0035] (2) Add 50g of tetraethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-necked flask, heat it in a constant temperature water bath at 35°C and stir continuously. After stirring is uniform, weigh 0.5g of 25% by mass Ammonia water was added to 30g of deionized water, dropped into a four-necked flask with a constant flow pump at a speed of 1ml / min, and discharged after being kept for 4 hours to prepare nano silica sol with a particle size of about 10nm, and the mass content of nano particles was 20%. Fourier infrared tester was used to test the structur...

Example Embodiment

[0041] Example 2: Water-based UV curing oligomer / nano-SiO 2 Preparation of copper wire mesh oil-water separation membrane

[0042] (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, and washed at 100W, 20KHz for 10 minutes, and hung up to dry at room temperature;

[0043] (2) Add 50g of tetraethoxysilane, 100g of absolute ethanol, and 20g of deionized water into a four-necked flask, heat it in a constant temperature water bath at 80°C and stir continuously. After stirring is uniform, weigh 0.5g of 25% mass concentration Hydrochloric acid was added to 30g of deionized water and dropped into a four-necked flask with a constant flow pump at a rate of 1ml / min. After being kept for 4 hours, the material was discharged to prepare nano silica sol with a particle size of 500nm, and the mass content of nanoparticles was 35%. Fourier infrared tester was used to test the structure of the synthesized nanoparticles....

Example Embodiment

[0049] Example 3: Water-based UV curing oligomer / nano-SiO 2 Preparation of oil-water separation membrane of aluminum wire mesh

[0050] (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, 40KHz for 10 minutes, and hung it to dry at room temperature;

[0051] (2) Add 50g of tetramethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-necked flask, heat it in a constant temperature water bath at 35°C and stir continuously. After stirring is uniform, weigh 0.5g of 25% mass concentration Sodium bicarbonate was added to 30g deionized water and dropped into a four-necked flask with a constant flow pump at a rate of 1.5ml / min. After 5 hours of heat preservation, the material was discharged to prepare nano silica sol with a particle size of 200nm, and the mass content of nanoparticles was 35%. . Fourier infrared tester was use...

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Abstract

The invention discloses a UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and an application thereof. The preparation method comprises the following steps: carrying out ultrasonic cleaning on a fabric silk screen; preparing nano sol by a sol-gel method, mixing 10-50 parts of a single-function UV cured oligomer, 60-80 parts of a bi-functional UV cured oligomer, 10-20 parts of multifunctional UV cured oligomer, 200-500 parts of silica sol, 1-5 parts of a waterborne photoinitiator and 1-5 parts of an emulsifier, and uniformly dispersing; coating a mixed liquor on the surface of a membrane by a dip-coating or spray process, drying, and carrying out UV curing to obtain a product. The surface of the oil-water separation membrane has a hydrophilic polymer molecular brush structure based on the micro-nano dual structure. The contact angle of the membrane to water and oil is 0 degree in the air, and the membrane has super-hydrophilicity. The contact angle of the membrane to oil drops is greater than 150 degrees underwater, and the membrane has low adherence to oil drops. The membrane provided by the invention can be used in separation of an oil-water mixture and treatment of oily sewage.

Description

technical field [0001] The invention relates to a water-based ultraviolet light-curing coating, in particular to an oil-water separation omentum with super-amphiphilic in the air and super-oleophobic underwater properties and its preparation method and application, belonging to light-curing materials and organic-inorganic hybrid nano-functions field of materials technology. Background technique [0002] Since the oil spill in the Gulf of Mexico in 2010, there has been an upsurge in the treatment of oily sewage, a global issue. 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 t...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D71/06B01D67/00B01D17/022C02F1/44
Inventor 涂伟萍袁腾王锋胡剑青
Owner SOUTH CHINA UNIV OF TECH
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