Separation net membrane with super-hydrophilicity/underwater super-lipophobicity as well as preparation method and application thereof

An oleophobic and super-hydrophilic technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of poor solvent resistance and low thermal stability, and achieve environmentally friendly, easy-to-clean, simple and easy-to-use processes. Effect

Active Publication Date: 2013-05-15
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

CN102029079A discloses that a superhydrophilic and underwater superoleophobic separation omentum has been prepared by coating a superhydroph

Method used

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  • Separation net membrane with super-hydrophilicity/underwater super-lipophobicity as well as preparation method and application thereof
  • Separation net membrane with super-hydrophilicity/underwater super-lipophobicity as well as preparation method and application thereof
  • Separation net membrane with super-hydrophilicity/underwater super-lipophobicity as well as preparation method and application thereof

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preparation example Construction

[0045] As a typical specific application example, the preparation method of the separation omentum of the present invention may comprise the following steps:

[0046] (1) Soak the metal mesh in deionized water and ultrasonically oscillate to remove impurities on the surface, then immerse it in absolute ethanol for ultrasonic oscillation cleaning, take it out, rinse it with deionized water, and dry it.

[0047] (2) Dissolve the inorganic base and the oxidizing agent in water with an electronic balance to prepare a homogeneous aqueous solution. The concentration of lye is 0.5-5 M, and the concentration of oxidant is 0.01-1.0 M.

[0048] (3) Soak the pre-washed and dried copper mesh in the solution for oxidation reaction, thereby forming nanowires covering the mesh on the surface of the metal mesh, and obtaining a separation mesh with underwater superoleophobic properties. After the reaction, the omentum was taken out, washed repeatedly with deionized water, and dried naturally ...

Embodiment 1

[0052] (1) Dip the 200-mesh copper grid into deionized water and ethanol for ultrasonic cleaning, then rinse with deionized water and dry naturally.

[0053] (2) At room temperature, add 100mL of water, 1g of sodium hydroxide and 1.92g of ammonium persulfate into a 150mL beaker, stir and mix evenly to prepare a uniform aqueous solution.

[0054] (3) Soak the pre-cleaned copper mesh in step (1) in the solution for oxidation reaction, the reaction time is 20 minutes, thereby forming copper hydroxide nanowires covering the metal mesh on the surface of the metal mesh, the length of the nanowire It is about 3-7μm. Take out the omentum after the reaction, wash it repeatedly with deionized water, and dry it naturally in the air. The nature of the separation omentum, the pore size of the omentum is about 55-60μm.

[0055] (4) measure the separation omentum that step (3) obtains with contact angle measuring instrument, the contact angle of this film surface to the water of 3 microlite...

Embodiment 2

[0058] (1) Dip the 300-mesh copper mesh into deionized water and ethanol for ultrasonic cleaning, then rinse with deionized water and dry naturally.

[0059] (2) At room temperature, add 100mL of water, 2 grams of sodium hydroxide and 2.96 grams of ammonium persulfate into a 150mL beaker, stir and mix evenly to prepare a uniform aqueous solution.

[0060] (3) Soak the pre-cleaned copper mesh in step (1) in the solution for oxidation reaction, the reaction time is 10 minutes, thereby forming copper hydroxide nanowires covering the metal mesh on the surface of the metal mesh, the length of the nanowire It is about 3-5μm. Take out the omentum after the reaction, wash it repeatedly with deionized water, and let it dry naturally in the air. The nature of the separation omentum, the omentum pore size is about 35-40μm.

[0061] (4) Measure the separated omentum that step (3) obtains with a contact angle measuring instrument, and the contact angle of the film surface to 3 microliters...

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Abstract

The invention discloses a separation net membrane with super-hydrophilicity/underwater super-lipophobicity as well as a preparation method and an application thereof. The separation net membrane comprises a supporting body with a grid structure and a nano wire growing on the grid structure, wherein the size of a grid is 100-2000 meshes; the length of the nano wire is 0.1-100 microns and the diameter is 10-1000nm; and the material of the nano wire comprises a metal hydroxide and/or a metal oxide. The preparation method comprises the following step of immersing the supporting body with the grid structure by an alkaline solution containing an oxidant until the nano wire grows on the grid structure to obtain a target product. The separation net membrane disclosed by the invention has the super-hydrophilicity and the underwater super-lipophobicity and can be used for carrying out oil-water separation treatment on various types of oil-water mixing systems; the separation net membrane has the advantages of high separation efficiency, high separation purity, fast separation speed, no need of external force driving, easiness in cleaning, good pollution resistance, energy conservation, environmental friendliness, long service life and the like; and meanwhile, the separation net membrane is simple in preparation process and low in cost, is environment-friendly, and is suitable for large-scale production.

Description

Technical field [0001] The present invention involves a material and preparation method that can be used for oil and water separation. It specially involves a kind of omentum and its preparation methods and applications with super -intricate and underwater and super -sparse oil properties.Technical field. Background technique [0002] The separation of oil and water has a wide range of application needs in social production and people's daily life. The sewage discharged in production and life mainly includes oil -containing sewage and waste oil containing waste oil.A large number of studies have reportedly prepared oil -water separation materials with super -care and hydrophobic materials, such as CN1101518695A, CN172103A, and CN1387932A.However, there are some problems while achieving the effects of oil and water separation. For example, it is necessary to introduce fluoride -containing materials during the preparation process. The loss of fluoride can easily cause secondary pol...

Claims

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Application Information

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IPC IPC(8): B01D17/022
Inventor 靳健张丰
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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