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Electrostatic spinning polymer nanofiber filter membrane composite strengthening method and composite structure filter membrane thereof

A nanofiber and electrospinning technology, which is applied in the fields of film materials, composite materials, and filter materials, can solve the problems of low strength of nanofiber films

Inactive Publication Date: 2021-11-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a method for composite strengthening of electrospinning polymer nanofiber filter membrane and its composite structure filter membrane. Lower problem, with broad application prospects

Method used

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  • Electrostatic spinning polymer nanofiber filter membrane composite strengthening method and composite structure filter membrane thereof
  • Electrostatic spinning polymer nanofiber filter membrane composite strengthening method and composite structure filter membrane thereof
  • Electrostatic spinning polymer nanofiber filter membrane composite strengthening method and composite structure filter membrane thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A kind of composite strengthening method of electrospinning polymer nanofiber film of the present invention, comprises the following steps:

[0034] Attach the 200-mesh stainless steel mesh to the electrospinning drum-type receiver with aluminum foil, and mix the PVDF powder with a molecular weight of 1 million, dimethylformamide and acetone evenly at a mass ratio of 12:62:26. Obtain PVDF spinning solution, and then carry out spinning, and spinning voltage is 20kV, and receiving distance is 18cm, and the extruding speed of syringe is 0.5ml / h, and drum type receiver rotating speed is 80rpm, and spinning time is 4h, obtains thickness approx. 20 micron PVDF nanofiber film.

[0035] Such as figure 1 As shown, the color of the nanofiber film is white, and the bottom of the film is a stainless steel mesh. The self-supporting film has poor strength and is easy to tear, while the film is attached to a high-strength stainless steel mesh, and a composite structure film with sig...

Embodiment 2

[0037] A kind of composite strengthening method of electrospinning polymer nanofiber film of the present invention, comprises the following steps:

[0038] Attach the 200-mesh stainless steel mesh to the electrospinning drum-type receiver with aluminum foil, and mix the PVDF powder with a molecular weight of 1 million, dimethylformamide and acetone evenly at a mass ratio of 12:62:26. Obtain the PVDF spinning solution, and then carry out spinning, the spinning voltage is 20kV, the receiving distance is 18cm, the extrusion speed is 0.5ml / h, the rotating speed of the drum type receiver is 80rpm, and the spinning time is 8h, and the obtained thickness is about 40 microns PVDF nanofiber film.

[0039] Such as figure 2 As shown, the color of the nanofiber film is white, and the thickness is doubled because the spinning time is twice that of Example 1. However, the strength of the self-sustaining film is still poor, and it is easy to tear, while the film is attached to a high-stre...

Embodiment 3

[0041] A kind of composite strengthening method of electrospinning polymer nanofiber film of the present invention, comprises the following steps:

[0042] First, the porous aluminum foil is subjected to micro-arc oxidation treatment to significantly improve its anti-corrosion and wear resistance, and then the porous aluminum foil treated by micro-arc oxidation is adhered to the electrospinning drum-type receiver with aluminum foil attached, and the French Arco Dissolve the PVDF powder with a molecular weight of 1.1 million and the commercial solvent of Dongguan Shunjie Plastic Co., Ltd. to obtain a PVDF spinning solution, and then carry out spinning. The spinning voltage is 20kV, the receiving distance is 18cm, and the extrusion speed is 0.5 ml / h, the rotating speed of the drum type receiver is 80rpm, and the spinning time is 6h to obtain a PVDF nanofiber film with a thickness of about 30 microns.

[0043] Such as image 3As shown, the self-supporting film has poor strength ...

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Abstract

The invention belongs to the technical field of crossing of thin film materials, composite materials and filter materials, and particularly relates to an electrostatic spinning polymer nanofiber filter membrane composite strengthening method and a composite structure filter membrane thereof. With the continuous development of electrostatic spinning equipment and applicable polymer materials, the problem of insufficient mechanical strength of the electrostatic spinning nanofiber filter membrane gradually becomes an important factor for limiting the wide application of the electrostatic spinning nanofiber filter membrane. According to the electrostatic spinning polymer nanofiber filter membrane composite strengthening method, the stainless steel, nylon filter screen or macroporous filter membrane is adopted as a matrix, and the obtained electrostatic spinning composite structure filter membrane has good mechanical properties. The composite structure porous membrane can be applied to the fields of ultrafiltration, nanofiltration, lithium ion battery diaphragms, nano sensors, tissue engineering, drug sustained release and the like.

Description

technical field [0001] The invention belongs to the interdisciplinary technical fields of film materials, composite materials and filter materials, and specifically relates to a composite strengthening method for electrospinning polymer nanofiber filter membranes and a filter membrane with a composite structure. Background technique [0002] Electrospinning is a simple and efficient technology for preparing polymer nanofibers. It has the advantages of low equipment cost, large-area film preparation, and application to a variety of polymer materials. It has attracted much attention in recent years. Electrospun polymer nanofiber films have many applications in the fields of filter materials, energy materials, nanosensors, tissue engineering, drug sustained release, etc., but have not yet been widely used in industry. [0003] The filter material is divided into gas filter material, liquid filter material and other filter materials (such as antibacterial filter, metal ion adsor...

Claims

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Application Information

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IPC IPC(8): B01D71/48B01D71/34B01D71/02B01D69/12B01D67/00B01D61/02D01D5/00D04H1/728
CPCB01D71/34B01D69/12D04H1/728D01D5/0084B01D67/0002B01D61/027B01D71/48B01D71/022B01D67/0079B01D2323/39
Inventor 付涛路玉雷
Owner XI AN JIAOTONG UNIV
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