Super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance as well as preparation and application of oil-water separation membrane

A super oleophobic oil and chemical resistance technology, applied in the field of oil-water separation membrane preparation, can solve the problems of poor performance, poor water resistance and chemical resistance, and achieve high speed, good chemical resistance, and easy to achieve. Effect

Active Publication Date: 2015-11-18
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese invention patents of authorized patent numbers ZL201310240149.1 and ZL201310224027.4 have invented a UV-cured superhydrophilic and underwater superoleophobic oil-water separation membrane with a hydrophilic polymer molecular brush structure and a thermally cured hydrogel. Structural superhydrophilic and underwater superoleophobic oil-water separation membranes, although both have good oil-water separation effect and oil pollution resistance, but the water resistance and chemical resistance of the membrane are poor
The Chinese invention patent with the authorized patent number ZL201310241229.4 invented a graphene oxide modified super-hydrophilic and underwater super-oleophobic oil-water separation membrane. Water resistance and chemical resistance, but its performance is still far from the effect of the present invention

Method used

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  • Super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance as well as preparation and application of oil-water separation membrane
  • Super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance as well as preparation and application of oil-water separation membrane
  • Super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance as well as preparation and application of oil-water separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (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.

[0058] (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 25% Add ammonia water to 30g of deionized water, drop it into a four-necked flask at a rate of 1mL / min with a constant flow pump, keep warm for 4 hours, and discharge to prepare a nano-silica sol with a particle size of about 10nm, with a mass content of nanoparticles of 20%. The structure of the synthesized nanoparticles was tested by a Fourier transform infrared tester. figure 1 The infrared spectrum is visible at 3400cm -1 There is a strong absorption peak at , which is the absorption peak...

Embodiment 2

[0067] (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, and was cleaned at 100W and 20KHz for 10min, and hung up to dry at room temperature.

[0068] (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 80°C and keep stirring. After stirring evenly, weigh 0.5g of 25% Add hydrochloric acid to 30 g of deionized water, drop it into a four-necked flask at a rate of 1 mL / min with a constant flow pump, and discharge after 4 hours of heat preservation to prepare a nano-silica sol with a particle size of 500 nm and a mass content of nanoparticles of 35%. The structure of the synthesized nanoparticles was tested by a Fourier transform infrared tester, and the obtained structure diagram was consistent with that of figure 1 resemblance.

[0069] (3) Dilute the UV-curable epoxy acrylate...

Embodiment 3

[0075] (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.

[0076] (2) Add 50g of tetramethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-necked flask, heat in a constant temperature water bath at 35°C and keep stirring, and after stirring evenly, weigh 0.5g of 25% Add sodium bicarbonate to 30g of deionized water, drop it into a four-neck flask with a constant flow pump at a rate of 1.5mL / min, and discharge after 5 hours of heat preservation to prepare a nano-silica sol with a particle size of 200nm, 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 diagram was consistent with that of figure 1 resemblance.

[0077] (3) Dilut...

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Abstract

The invention belongs to the technical field of preparation of oil-water separation membranes and discloses a super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance as well as a preparation method and an application of the oil-water separation membrane. The oil-water separation membrane is prepared with a method comprising steps as follows: nano-sol is prepared and mixed with mono-functional UV (ultraviolet)-curable oligomer, a dual-functional UV-curable oligomer and a poly-functional UV-curable oligomer, and a UV-curable water-based coating is obtained; a screen mesh is coated with the UV-curable water-based anticorrosive coating with a dip coating method or a spray coating method, UV curing is performed after drying, and an anticorrosive base-coated mesh membrane is obtained; the anticorrosive base-coated mesh membrane is coated with the UV-curable water-based coating with the dip coating method or the spray coating method, drying and UV curing are performed, and the super-hydrophilic and underwater super-oleophobic oil-water separation membrane with chemical resistance is obtained. The oil-water separation membrane has contact angles of zero with water and oil in air, has a contact angle larger than 150 degrees with oil drops underwater, and can be applied to separation of an oil-water mixture and treatment of oily sewage.

Description

technical field [0001] The invention belongs to the technical field of preparation of oil-water separation membranes, in particular to a chemical-resistant super-hydrophilic and underwater super-oleophobic oil-water separation membrane and its preparation method and application. Background technique [0002] In recent years, the research on macromolecular self-assembly has made a series of significant progress, which has become a research hotspot. One of the important application areas is molecular brush polymers, which have good application prospects in self-cleaning, antifouling coatings and other fields. . When the surface of the membrane has a hydrophilic polymer molecular brush structure, the surface hydrophilicity of the membrane will be better. At the same time, because the hydrophilic polymer molecular brush is in a fully extended structure in water, the surface of the membrane has a On the basis of the binary rough structure, there is also a nano-scale fluff struct...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/02B01D67/00B01D17/022
Inventor 袁腾杨卓鸿涂伟萍周显宏
Owner SOUTH CHINA AGRI UNIV
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