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 effects of large water flux, low energy consumption, and good anti-oil adhesion effect

Inactive Publication Date: 2015-04-22
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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  • 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
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Waterborne UV Curable Oligomer / Nano-SiO 2 Preparation of stainless steel wire mesh oil-water separation 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 and 40KHz for 8min, and hung up to dry at room temperature;

[0035] (2) 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 1ml / min, keep it warm for 4 hours, and discharge the material to prepare a nano-silica sol with a particle size of about 10nm, and the mass content of the nanoparticles is 20%. The structure of the synthesized nanoparticles was tested by a Fourier trans...

Embodiment 2

[0041] Example 2: Waterborne UV Curable Oligomer / Nano-SiO 2 Preparation of Copper Mesh Oil-Water Separation Mesh

[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, respectively, cleaned at 100W and 20KHz for 10min, 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-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 discharge the material to prepare a nano-silica sol with a particle size of 500 nm, and the mass content of the nanoparticles is 35%. The structure of the synthesized nanoparticles was tested by a Fourier transform infrared tester, and the obtained structure diag...

Embodiment 3

[0049] Example 3: Waterborne UV Curable Oligomer / Nano-SiO 2 Preparation of Aluminum Mesh Oil-Water Separation 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 and 40KHz for 10min, and hung up to dry at room temperature;

[0051] (2) 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 with particle diameter of 200nm, the mass content of nanoparticles is 35% . The structure of the synthesized nanoparticles was tested by a Fourier transform infrared tester,...

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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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Patent Type & Authority Patents(China)
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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