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Static spinning method and nano fiber/glass fiber composite filter material prepared by same

A technology of electrospinning and glass fiber, which is applied in the direction of spinning solution preparation, filtration separation, fiber treatment, etc., and can solve problems such as electric field interference

Active Publication Date: 2016-01-13
上海迅江科技有限公司
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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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  • Static spinning method and nano fiber/glass fiber composite filter material prepared by same
  • Static spinning method and nano fiber/glass fiber composite filter material prepared by same
  • Static spinning method and nano fiber/glass fiber composite filter material prepared by same

Examples

Experimental program
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Effect test

Embodiment 1

[0071] An electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated. figure 1 It 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 things.

Embodiment 2

[0073] 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 bottom 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. The depth of the groove is 3 times the length of the needle; the insulation material is polycarbonate.

Embodiment 3

[0075] An electrospinning method is multi-needle electrospinning, and the needles of the multi-needle electrospinning are insulated.

[0076] The specific steps are:

[0077] (1) adding inorganic nanoparticles, silicon 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;

[0078] (2) The polymer polyacrylonitrile is added to the dispersion liquid, and magnetically stirred for 8 hours to prepare a uniform and stable spinning solution, wherein the mass fraction of polyacrylonitrile is 9%, and the amount of inorganic nanoparticles added is and 10% of the total mass of inorganic nanoparticles;

[0079](3) The spinning solution is subjected to multi-needle electrospinning. The process conditions of multi-needle electrospinning are: power supply voltage 50KV, spinning environmental conditions are temperature 35°C, relative humidity 25%, spinning so...

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Abstract

The invention relates to a static spinning method and a nano fiber / glass fiber composite filter material prepared by the same. According to the static spinning method, multiple needles are used to carry out static spinning, and the needles are insulated to each other. The nano fiber / glass fiber composite filter material is prepared by laminating and combining different filter materials together from bottom to top, wherein the filter efficiency of filter materials increases from bottom to top; the side, which is provided with static spun fibers, of each filter material layer is upward, the surface of the top layer is covered by glass fiber filter paper to ensure that the top layer and bottom layer of the filter material are both made of glass fiber filter paper. For two neighbored filter material layers, the filter efficiency of the upper layer on particles with a size of 0.02 to 10 [mu]m is 1.03 to 1.3 times higher than that of the lower layer. The composite filter material comprises two to six filter material layers, and has an sandwich structure, wherein in the sandwich structure, glass fiber filter paper and nano fiber with an electret effect are arranged alternately. The nano fiber / glass fiber composite filter material has a filter efficiency of 99.999% or more on particles with a size of 0.02 to 10 [mu]m, and the pressure resistance is maintained at 10 to 30 Pa.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and relates to an electrospinning method and a nanofiber / glass fiber composite filter material prepared by the same. 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, the electric field between the needles is mainly controlled by using metal auxiliary electrodes, and the jet is stabilized by adding a metal ring at the tip of the spinneret...

Claims

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Application Information

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IPC IPC(8): B01D39/00D01D5/00D01D1/02
Inventor 丁彬赵兴雷曹雷涛俞建勇
Owner 上海迅江科技有限公司
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