Composite nanofiber membrane and preparation method and application thereof

A technology for compounding nanofibers and nanofibers, which is applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve the problems of destroying the nanofiber structure, lack of wide applicability, and cumbersome processes, and achieves a simple preparation process, Reduced pressure drop and drag, cost-effective effects

Inactive Publication Date: 2017-10-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above prior art, although the aforementioned several examples have increased the fluffy degree of the nanofiber membrane to a certain extent, reduced the pressure drop of the fiber membrane, and improved the air permeability of the material, but the process is relatively cumbersome, the efficiency is relatively low, and the cost is high.
The method of dissolving the porogen in the spinning solution described later will destroy the structure of the nanofibers and is not widely applicable.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A composite nanofiber membrane is made of electrospun nanofiber deposition foaming material; the foaming material is polyvinyl alcohol.

[0028] A method for preparing a composite nanofibrous membrane, comprising the following steps:

[0029] Step 1, preparation of electrospinning solution: dissolving polyamide-6 in formic acid solution, stirring mechanically at a speed of 200 r / min for 10 h at room temperature to prepare a solution with a mass fraction of 20%, and standing to remove air bubbles;

[0030] Step 2. Preparation of electrostatic spray solution: Dissolve 0.4g polyacrylcyanide in 19.6g N,N-dimethylformamide, stir well to dissolve, add 0.5g sodium bicarbonate, stir ultrasonically, fully disperse, and let stand to remove Bubble;

[0031] Step 3, preparation of composite nanofiber membrane: the electrospinning solution prepared in the first step is placed in the syringe 3 for electrospinning, and the electrostatic spray solution prepared in the second step is p...

Embodiment 2

[0035] A composite nanofiber membrane is made of electrospun nanofiber deposition foaming material; the foaming material is polyethylene.

[0036] Step 1, preparation of electrospinning solution: dissolve polyacrylonitrile in dimethylformamide solution, mechanically stir at a speed of 600r / min at room temperature until completely dissolved, and make a solution with a mass fraction of 10%, and let it stand remove air bubbles;

[0037] Step 2, preparation of electrostatic spray solution: Dissolve polyethylene in toluene under a water bath condition of at least 70°C, prepare 20 g of electrostatic spray solution with a mass fraction of 3%, let it stand for defoaming, add 0.2 calcium carbonate after cooling, Ultrasonic stirring until uniform dispersion;

[0038] Step 3, preparation of composite nanofiber membrane: the electrospinning solution prepared in the first step is placed in the syringe 3 for electrospinning, and the electrostatic spray solution prepared in the second step ...

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Abstract

The invention discloses a composite nanofiber membrane and a preparation method and application thereof. The composite nanofiber membrane is prepared from electrostatic nanofiber deposition foam material. Compared with the prior art, the composite nanofiber membrane has the advantages that by the utilization of an electrostatic spraying technology, foaming particles or foaming short fibers are prepared and deposit on the surface of electrostatic nanofibers, so that the composite nanofiber membrane with controllable thickness is obtained, and the porosity, air permeability and filling power of the nanofiber membrane are improved. By the utilization of the method, the resistance to impact load, heat insulation, sound insulation, specific strength and other physical and mechanism properties of the nanofiber membrane are improved. With the method, the pressure drop and resistance of the nanofiber membrane are reduced, the preparation technology is simple, and cost is low.

Description

technical field [0001] The invention belongs to the field of material chemistry, and relates to a nanofiber membrane with controllable thickness, in particular to a composite nanofiber membrane combined with electrospun nanofibers and foaming materials, and a preparation method and application thereof. Background technique [0002] Due to the characteristics of small fiber diameter, large specific surface area, strong adsorption capacity and high surface free energy, nanofibers are widely used in many fields. In terms of filtration, especially in air filtration, compared with traditional filter materials, nanofiber membranes have high specific surface area, high adsorption capacity, high adsorption capacity, small pore size, high barrier capacity, light weight and excellent air permeability. It has gradually become one of the research hotspots. [0003] Traditional electrospun nanofibers have remarkable high-efficiency filtration characteristics, but studies have shown that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H5/08D01D5/30D01D5/00
CPCD04H5/08D01D5/003D01D5/0069D01D5/30D10B2211/06D10B2321/021D10B2321/022D10B2321/041D10B2321/042D10B2321/06D10B2321/08D10B2321/121D10B2331/02D10B2331/04D10B2331/10D10B2401/06
Inventor 魏取福逄增媛聂清欣李国辉吕鹏飞
Owner JIANGNAN UNIV
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