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Preparation method of PAN/PAMS/ZnO oil-water separation membrane

A technology of oil-water separation membrane and composite membrane, which is applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of the oil-water separation efficiency of filter membranes to be improved, the comprehensive cost of super-hydrophobic membranes, and the complicated preparation process, etc., to achieve The effect of low overall cost, improved hydrophobic performance, and simple preparation process

Active Publication Date: 2019-01-22
刘青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention is convenient to obtain materials, the preparation process is relatively complicated, and the oil-water separation efficiency of the obtained filter membrane needs to be improved.
[0007] In summary, the existing methods for preparing oil-water separation membranes with excellent hydrophobic properties usually require complex mechanical equipment, and the preparation process is complicated and energy-consuming, resulting in high overall cost of super-hydrophobic membranes. Therefore, it is necessary to develop a low-cost And high-efficiency super-hydrophobic oil-water separation membrane is of great significance

Method used

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  • Preparation method of PAN/PAMS/ZnO oil-water separation membrane
  • Preparation method of PAN/PAMS/ZnO oil-water separation membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Dissolve polyacrylonitrile in N,N-dimethylformamide to make spinning solution, and then perform electrospinning to obtain polyacrylonitrile nanofiber membrane; the spinning voltage of electrospinning is 13kV , the receiving distance is 13cm, and the diameter of the spinning hole is 380nm; in the spinning solution, 5 parts by weight of polyacrylonitrile and 95 parts by weight of N,N-dimethylformamide;

[0031] (2) Spread the polyacrylonitrile nanofiber membrane prepared in step (1) on a glass substrate, and set it aside;

[0032] (3) Dissolve poly-α-methylstyrene in N,N-dimethylformamide, stir to form a uniform solution, then add a poor solvent dropwise, and then cast the solution onto the polyacrylonitrile nanofibers on the substrate On the surface of the membrane, due to the gradual phase separation of the solution, the molecular chains of poly-α-methylstyrene are curled into random coils on the outer wall of the polyacrylonitrile fiber, and gradually become larger...

Embodiment 2

[0036] (1) Dissolve polyacrylonitrile in N,N-dimethylformamide to make spinning solution, and then perform electrospinning to obtain polyacrylonitrile nanofiber membrane; the spinning voltage of electrospinning is 11kV , the receiving distance is 11cm, and the diameter of the spinning hole is 450nm; in the spinning solution, there are 5 parts by weight of polyacrylonitrile and 95 parts by weight of N,N-dimethylformamide;

[0037] (2) Spread the polyacrylonitrile nanofiber membrane prepared in step (1) on a glass substrate, and set it aside;

[0038](3) Dissolve poly-α-methylstyrene in N,N-dimethylformamide, stir to form a uniform solution, then add a poor solvent dropwise, and then cast the solution onto the polyacrylonitrile nanofibers on the substrate On the surface of the membrane, due to the gradual phase separation of the solution, the molecular chains of poly-α-methylstyrene are curled into random coils on the outer wall of the polyacrylonitrile fiber, and gradually beco...

Embodiment 3

[0042] (1) Dissolve polyacrylonitrile in N,N-dimethylformamide to make spinning solution, and then perform electrospinning to obtain polyacrylonitrile nanofiber membrane; the spinning voltage of electrospinning is 14kV , the receiving distance is 14cm, and the diameter of the spinning hole is 450nm; in the spinning solution, there are 7 parts by weight of polyacrylonitrile and 93 parts by weight of N,N-dimethylformamide;

[0043] (2) Spread the polyacrylonitrile nanofiber membrane prepared in step (1) on a glass substrate, and set it aside;

[0044] (3) Dissolve poly-α-methylstyrene in N,N-dimethylformamide, stir to form a uniform solution, then add a poor solvent dropwise, and then cast the solution onto the polyacrylonitrile nanofibers on the substrate On the surface of the membrane, due to the gradual phase separation of the solution, the molecular chains of poly-α-methylstyrene are curled into random coils on the outer wall of the polyacrylonitrile fiber, and gradually bec...

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Abstract

The invention belongs to the technical field of oil-water separation materials, and provides a preparation method of a PAN / PAMS / ZnO oil-water separation membrane. The method comprises the following steps: casting a PAMS solution containing a poor solvent on the surface of a PAN nanofiber membrane to make PAMS curled on the outer wall of PAN fibers in order to form a bead-like structure, and performing deposition by using a ZnO dispersion to further form a multilayer rough structure in order to prepare the PAN / PAMS / ZnO oil-water separation membrane. Compared with oil-water separation membranesprepared by conventional methods, the oil-water separation membrane prepared in the invention only has the advantages of large water contact angle, high separation efficiency during oil-water separation, and no need of a complex device; and the preparation method has the advantages of simple preparation process, low energy consumption, low comprehensive cost, and suitableness for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation materials and provides a preparation method of a PAN / PAMS / ZnO oil-water separation membrane. Background technique [0002] Oily sewage comes from a wide range of sources, such as petrochemical industry, oil exploitation, transportation, mechanical processing, leather, textile, food, medicine and so on. Every year, 5 to 10 million tons of oil flow into the ocean through various channels in the world. Due to the high chemical oxygen demand (COD) and high oil content of oily sewage, it has serious environmental pollution. Whether it is environmental treatment, oil recovery and water reuse, it is required to effectively separate oily sewage. Therefore, oil-water separation technology and its The research and application of materials has become a hot topic. [0003] The traditional treatment methods for oily sewage usually include gravity separation, slag scraping, flotation, demulsifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/42B01D71/28B01D69/12B01D67/00B01D17/022B01D17/02
CPCB01D17/02B01D17/085B01D67/0079B01D69/12B01D71/28B01D71/42B01D2323/02B01D2323/26B01D2325/38
Inventor 蔡露
Owner 刘青