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Electrostatic spinning method and nanometer fiber/anti-sticking non-woven fabric composite filter material prepared through electrostatic spinning method

A spunbond non-woven fabric and electrospinning technology, applied in the field of electrospinning, can solve problems such as electric field interference

Active Publication Date: 2015-12-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the problem of electric field interference in the process of multi-needle electrospinning in the prior art, an insulating material is used to conduct anti-interference and isolation treatment for each needle

Method used

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  • Electrostatic spinning method and nanometer fiber/anti-sticking non-woven fabric composite filter material prepared through electrostatic spinning method
  • Electrostatic spinning method and nanometer fiber/anti-sticking non-woven fabric composite filter material prepared through electrostatic spinning method
  • Electrostatic spinning method and nanometer fiber/anti-sticking non-woven fabric composite filter material prepared through electrostatic spinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] An electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated. figure 1It is a schematic diagram of the electrospinning needle isolation device, wherein 1 is an insulating material separator, 2 is a spinneret device, and 3 is a spinneret base; the needles share the same insulating bottom plate; Anti-interference isolation treatment; specifically, there are insulating materials around the needle to form an isolation groove, the shape of the isolation groove is square, and the depth of the isolation groove is 1 times the length of the needle; the insulating material is styrene-butadiene-acrylonitrile copolymerization thing.

Embodiment 2

[0080] An electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated. Among them, the needles share the same insulating base plate; the insulation between the needles refers to the use of insulating materials to conduct anti-interference isolation treatment for each needle; specifically, there are insulating materials around the needles to form an isolation groove, and the shape of the isolation groove is circular. The depth of the slot is 3 times the length of the needle; the insulation is polycarbonate.

Embodiment 3

[0082] An electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated.

[0083] The specific steps are:

[0084] (1) adding the inorganic nanoparticle titanium dioxide nanoparticle to the solvent N,N-dimethylformamide, and ultrasonically dispersing for 30 minutes to obtain a dispersion liquid in which the nanoparticles are uniformly dispersed;

[0085] (2) Add the polymer polysulfone to the dispersion liquid, stir magnetically for 8 hours, and prepare a uniform and stable spinning solution, wherein the mass fraction of polysulfone is 12%, and the addition amount of inorganic nanoparticles is polymer and inorganic 10% of the total mass of nanoparticles;

[0086] (3) Multi-needle electrospinning was performed on the spinning solution. The process conditions of multi-needle electrospinning were: power supply voltage 45KV, spinning environment conditions were temperature 35°C, relative humidity 25%, spinning solution p...

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Abstract

The invention relates to an electrostatic spinning method and a nanometer fiber / anti-sticking non-woven fabric composite filter material prepared through the electrostatic spinning method. Multi-needle electrostatic spinning is adopted in the electrostatic spinning method, and needles of multi-needle electrostatic spinning are insulated from one another. The prepared nanometer fiber / anti-sticking non-woven fabric composite filter material is formed by overlapping and compositing materials for overlapping from bottom to top according to the low-to-high sequence of filtering efficiency of a filtering material, the face, with electrostatic spinning fiber, of each layer of material for overlapping faces upwards, the uppermost layer of material for overlapping is covered with anti-sticking non-woven fabric, and therefore it is ensured that the top layer and the bottommost layer are both anti-sticking non-woven fabric layers; of every two adjacent layers of materials for overlapping, the filtering efficiency value for particles with grain size of 0.02 micron to 10 microns of the upper layer is 1.03-1.3 times that of the lower layer, the number of overlapping layers of the materials for overlapping ranges from 2 to 6, the anti-sticking non-woven fabric and the interlayer structure with electret effect nanometer fibers arrayed at intervals are formed, and the nanometer fiber / anti-sticking non-woven fabric composite filter material is formed; the filtering efficiency of the nanometer fiber / anti-sticking non-woven fabric composite filter material for particles with grain size of 0.02 micron to 10 microns reaches 99.999% or higher, and the pressure resistance is kept between 10 Pa and 30 Pa.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and relates to an electrospinning method and a nanofiber / spunbond nonwoven composite filter material prepared therefrom. Background technique [0002] In the process of multi-needle electrospinning, electric field interference will be generated between the needles, resulting in a difference in the electric field strength between the needles, resulting in unstable jet flow and ultimately affecting the uniformity of the spun fiber membrane. Controlling the electric field intensity in the spinning process keeps the jet of each spinneret stable, which can effectively improve the uniformity of the fiber membrane and stabilize the performance of the filter material. In the existing literature, metal auxiliary electrodes are mainly used to control the electric field between the needles, and the jet is stabilized by adding a metal ring at the tip of the spinneret that applies the same voltage as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D04H13/00B01D39/14
Inventor 丁彬曹雷涛赵兴雷俞建勇
Owner DONGHUA UNIV
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