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Preparation method of hydrophobic and lipophilic self-supporting membrane polymer porous membrane and composite hydrophobic and lipophilic separation material

A self-supporting membrane, hydrophobic and lipophilic technology, applied in the direction of separation methods, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems that limit wide application, etc., achieve low substrate selectivity, simple preparation process, and good adhesion Effect

Active Publication Date: 2021-05-07
江苏艾合复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lack of separation membrane in many aspects such as mechanical strength, anti-pollution ability and thermal stability limits the possibility of its wide application.

Method used

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  • Preparation method of hydrophobic and lipophilic self-supporting membrane polymer porous membrane and composite hydrophobic and lipophilic separation material
  • Preparation method of hydrophobic and lipophilic self-supporting membrane polymer porous membrane and composite hydrophobic and lipophilic separation material
  • Preparation method of hydrophobic and lipophilic self-supporting membrane polymer porous membrane and composite hydrophobic and lipophilic separation material

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preparation example Construction

[0037] The preparation method of the hydrophobic and lipophilic self-supporting polymer porous membrane is to mix the polymer material solution with a stabilizer and then stir to form a stable emulsion, and then spread the obtained mixed solution on the surface of substrate plates of different materials, and wait for the solvent to volatilize Hydrophobic and lipophilic self-supporting membrane polymer porous membrane or porous modified composite material can be obtained.

[0038] As a preferred embodiment of the present invention, the method includes the following specific steps:

[0039] Dissolving the target polymer in a solvent to prepare a polymer solution;

[0040] Configure stabilizer solution;

[0041] The above two solutions are mixed and vigorously stirred to obtain an emulsion;

[0042] Leave the emulsion for a period of time to obtain a stable emulsion;

[0043] Cast the rested emulsion into a watch glass to spread it evenly;

[0044] After the solvent in it is ...

Embodiment 1

[0058] Weigh the polymer POSS-(PMMA-Cl) of 50mg 8 Put it in a conical flask, add 5mL of toluene solvent to dissolve it, add 5mL of ultrapure water after the polymer is completely dissolved, and use a high-speed homogeneous stirrer to stir at a speed of 10000r / min for 5min to prepare an emulsion. Spread it on a petri dish, let the solvent dry naturally at room temperature for 24 hours, then peel off the prepared film from the petri dish to obtain a hydrophobic and lipophilic self-supporting membrane polymer porous membrane. Its thickness is 100 μm, and the average pore diameter is 9.0±0.5 μm.

Embodiment 2

[0060] Weigh the polymer POSS-(PMBA-Cl) of 50mg 8 Put it in a conical flask, add 5mL of toluene solvent to dissolve it, and add Na at a concentration of 1mol / L after the polymer is completely dissolved 2 CO 3 5mL of the aqueous solution was homogeneously stirred for 5min with a high-speed homogeneous agitator at a speed of 10000r / min to prepare an emulsion. will be Na 2 CO 3 The aqueous solution is the emulsion prepared in the water phase and stands still for a week. After the emulsion is stable, it is spread in a petri dish, and the solvent is allowed to evaporate naturally at room temperature for 24 hours. Rinse the film with water to remove excess salt, and let it dry at room temperature to obtain a hydrophobic and lipophilic porous polymer film. Its thickness is 100 μm, and the average pore diameter is 6.0±0.5 μm.

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Abstract

The invention relates to a method for preparing a hydrophobic-lipophilic self-supporting polymer porous membrane and a composite hydrophobic-lipophilic separation material. The emulsion obtained after stabilizing high-speed stirring is stabilized by adding a stabilizer to the polymer solution, and is prepared by volatilization of a solvent. Hydrophobic-oleophilic self-supporting membrane polymer porous membrane. The composite hydrophobic-lipophilic separation material can be obtained by casting the emulsion onto different substrates. The micron-scale pore structure in the film increases the roughness of the surface, and the nano-scale and / or micron or sub-micron-scale pores make the film hydrophobic, thereby enabling efficient separation of emulsified oil and water. The invention solves the problems of poor thermal stability, acid and alkali resistance, poor anti-pollution ability and poor mechanical strength of ordinary polymer separation membranes, has high separation efficiency and flux, and its preparation process is simple and easy to operate, and can be applied It is used to prepare a large-area separation membrane with controllable thickness, uniform flatness and high mechanical strength.

Description

technical field [0001] The invention belongs to the preparation of polymer materials, and relates to a method for preparing a hydrophobic-oleophilic self-supporting membrane polymer porous membrane and a composite hydrophobic-oleophilic separation material. Background technique [0002] The emulsified oil and water produced in the industrial production process has a large amount of discharge and complex components, which seriously endanger the water environment and human health. Therefore, it is necessary to treat the emulsified oil wastewater to remove the emulsified oil. However, the separation effect and efficiency of traditional processing methods are low. With the wide application of membrane separation method in filtration, separation, purification, etc., emulsified oil-water membrane separation has gradually attracted people's attention. However, the lack of separation membrane in many aspects such as mechanical strength, anti-pollution ability, thermal stability, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D69/02B01D67/00B01D17/022
CPCB01D17/085B01D67/0013B01D69/02B01D71/70B01D2325/36
Inventor 陈芳吴亚东孟繁想马晓燕
Owner 江苏艾合复合材料有限公司
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