A preparation method of nanofiber/spun-bonded non-woven composite filter material and composite filter material prepared by the method

A technology of spun-bonded non-woven fabrics and nanofibers, applied in the field of electrospinning, which can solve problems such as electric field interference

Active Publication Date: 2017-08-04
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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  • A preparation method of nanofiber/spun-bonded non-woven composite filter material and composite filter material prepared by the method
  • A preparation method of nanofiber/spun-bonded non-woven composite filter material and composite filter material prepared by the method
  • A preparation method of nanofiber/spun-bonded non-woven composite filter material and composite filter material prepared by the 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, in which, 1 is an insulating material partition, 2 is a spinneret device, and 3 is a spinneret base; the needles share the same insulating bottom plate; the insulation between the needles refers to the use of insulating materials for each needle. Anti-interference isolation treatment; specifically, there is an insulating material 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 copolymer 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 carry out anti-interference isolation treatment for each needle; specifically, there are insulating materials around the needles to form isolation grooves, and the shape of the isolation grooves is circular. The depth of the groove is 3 times the length of the needle; the insulation material 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 inorganic nanoparticle titanium dioxide nanoparticles into 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 into the dispersion liquid, stir it 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 the polymer and inorganic 10% of the total mass of nanoparticles;

[0086] (3) The spinning solution is subjected to multi-needle electrospinning. The process conditions of multi-needle electrospinning are: power supply voltage 45KV, spinning environmental conditions are temperature 35°C, relative humidity 25%, spinning sol...

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Abstract

The invention relates to an electrospinning method and a nanofiber / spunbond nonwoven composite filter material prepared therefrom. The electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated; The nanofiber / spun-bonded non-woven composite filter material is made by superimposing and compounding the laminated materials from bottom to top according to the filtration efficiency of the filter material from low to high. Each layer of laminated materials is made of electrospun fibers. One side is up, and a spunbonded non-woven fabric is covered on the uppermost layer to ensure that both the top layer and the bottom layer are spunbonded non-woven fabric layers; two adjacent layers of materials are used for lamination, and the upper layer can filter particles of 0.02 to 10 μm The efficiency value is 1.03 to 1.3 times that of the lower layer, and the number of layers of laminated materials is 2 to 6 layers, forming a sandwich structure of spunbonded non-woven fabrics and nanofibers with electret effect, and making nanofibers / spun Bonded non-woven composite filter material; nanofiber / spun-bonded non-woven composite filter material has a filtration efficiency of 99.999% and above for particles of 0.02-10 μm, and maintains a pressure resistance of 10-30Pa.

Description

technical field [0001] The invention belongs to the technical field of electrostatic spinning, and relates to an electrostatic spinning method and a nanofiber / spun-bonded non-woven fabric composite filter material prepared by the electrostatic spinning method. Background technique [0002] During the multi-needle electrospinning process, there will be electric field interference between the needles, which will cause differences in the electric field strength between the needles, resulting in unstable jet flow, and ultimately affecting the uniformity of the fiber film obtained by spinning. Control the electric field intensity during the spinning process to keep the jet flow of each spinneret stable, which can effectively improve the uniformity of the fiber membrane and achieve the stability of 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 stabiliz...

Claims

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Application Information

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Patent Type & Authority Patents(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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