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Composite fiber membrane and preparation method and application thereof

A composite fiber membrane and solute technology, applied in the field of textile fiber membranes, can solve the problems of low separation efficiency, ecological environment impact, and insufficient recovery of petroleum and other resources, and achieve the effect of outstanding separation efficiency and easy recovery.

Active Publication Date: 2021-07-16
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uncertainty of oil and gas exploitation, complete equipment cannot be provided at the beginning of exploitation, so the cooling water mixed with oil and other substances will be directly discharged into the natural environment without treatment, which will have a certain impact on the ecological environment
The best way is to separate oil and water before discharge, but the separation efficiency is low, and most of the oil and other resources are still too late to recover

Method used

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  • Composite fiber membrane and preparation method and application thereof
  • Composite fiber membrane and preparation method and application thereof
  • Composite fiber membrane and preparation method and application thereof

Examples

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preparation example Construction

[0044] The present invention also provides a method for preparing the composite fiber membrane, comprising the following steps:

[0045] (1) spinning the independently prepared hydrophobic layer solution, hydrophilic layer solution and transfer layer solution to obtain a fiber membrane;

[0046] (2) Cross-linking the fiber membrane and the hydrogel solution to obtain the composite fiber membrane.

[0047] In the present invention, the hydrophobic layer solution, the hydrophilic layer solution and the transfer layer solution in the step (1) are preferably independently obtained by stirring and ultrasonication.

[0048]In the present invention, the stirring time is preferably 20-28 hours, more preferably 22-26 hours, more preferably 23-25 ​​hours; the stirring temperature is preferably 18-60°C, more preferably 28-50°C, More preferably, it is 38-40° C.; the rotational speed of the stirring is preferably 350-450 rpm, more preferably 360-440 rpm, and more preferably 380-420 rpm. ...

Embodiment 1

[0066] Preparation of hydrophobic layer raw materials: polystyrene 100g, acetone 300g, dimethylformamide 700g;

[0067] Preparation of transfer layer raw materials: polyvinyl alcohol 10g, polyacrylonitrile 100g, dimethylformamide 1100g;

[0068] Preparation of raw materials for the hydrophilic layer: 20 g of methacryloyl ethyl sulfobetaine, 200 g of polyacrylonitrile, 200 g of hexafluoroisopropanol, and 2000 g of dimethylformamide.

[0069] The above raw materials were independently stirred at 40°C and 400rpm for 24h, and then ultrasonicated at 40°C and 45kHz for 0.4h after the stirring was completed. After the ultrasonication was completed, a hydrophobic layer solution, a transfer layer solution and a hydrophilic layer solution were obtained.

[0070] In this embodiment, spinning is carried out in the order of hydrophilic layer, transfer layer and hydrophobic layer from top to bottom, and the hydrophobic layer is spun first.

[0071] Textile hydrophobic layer: the inner diam...

Embodiment 2

[0086] Preparation of hydrophobic layer raw materials: PTFE 200g, acetone 800g, dimethylformamide 1200g;

[0087] Prepare transfer layer raw materials: polyvinylpyrrolidone 20g, polymethyl methacrylate 180g, dimethylformamide 2000g;

[0088] Preparation of hydrophilic layer raw materials: 3-[[2-(methacryloyloxy)ethyl]dimethylammonium] propionate 15g, polyester 150g, hexafluoroisopropanol 181.5g, dimethylformamide 1633.5g.

[0089] The above raw materials were independently stirred at 50°C and 430rprn for 20h, and then ultrasonicated at 30°C and 44kHz for 0.5h after the stirring was completed. After the ultrasonication was completed, a hydrophobic layer solution, a transfer layer solution and a hydrophilic layer solution were obtained.

[0090] In this embodiment, spinning is carried out in the order of transfer layer, hydrophobic layer and hydrophilic layer from top to bottom, and the hydrophilic layer is spun first.

[0091] Textile hydrophilic layer: the inner diameter of ...

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Abstract

The invention belongs to the technical field of textile fiber membranes. The invention provides a composite fiber membrane, the composite fiber membrane has a three-layer structure which is respectively a hydrophobic layer, a hydrophilic layer and a transfer layer, each layer uses different solutes and solvents, a mixed solution is spun into a membrane in an electrostatic spinning form, and then the three layers of fiber membranes are combined together under the action of electrostatic force, and finally, the solute in the hydrophilic layer is cross-linked by adopting an ultraviolet irradiation mode so as to obtain the composite fiber membrane. The composite fiber membrane has outstanding separation efficiency in a mixture such as an oil-water mixture or an oil-in-water emulsion and the like, and is convenient for recovering substances.

Description

technical field [0001] The invention relates to the technical field of textile fiber membranes, in particular to a composite fiber membrane and its preparation method and application. Background technique [0002] With the advancement of industrial production, water has become an indispensable resource in development, especially in fields such as resource exploration, where water resources play multiple roles. During oil and gas extraction, a large amount of water is often needed to cool down the drill bit. As the drill goes deeper into the ground, the water used for cooling will carry part of the energy back to the ground. Due to the uncertainty of oil and gas exploitation, complete equipment cannot be provided at the beginning of exploitation, so the cooling water mixed with oil and other substances will be directly discharged into the natural environment without treatment, which will have a certain impact on the ecological environment. The best way is to separate oil and...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/30B32B27/32B32B27/36B32B27/40B32B27/12D04H1/728
CPCB32B5/022B32B5/26D04H1/728B32B2262/023B32B2262/0223B32B2262/0246B32B2262/0253B32B2262/0276B32B2262/0292B32B2307/728B32B2307/73
Inventor 许瞳白杰李春萍孟海涛梁海欧孙炜岩
Owner INNER MONGOLIA UNIV OF TECH