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An electromagnetic integrated nanofiber filter material and its preparation and activation method

A nanofiber, activation method technology, applied in the direction of fiber chemical characteristics, fiber treatment, fiber type, etc., can solve the problem of not mentioning the activation time and activation rate of electrets, the immature synthesis process of charge-enhancing additives, and the lack of instructions. , to enhance the interface polarization effect, enhance the ability to store charges for a long time, and reduce the direct current loss.

Active Publication Date: 2019-10-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the synthesis process of this charge-enhancing additive is still immature, and it adopts the method of corona electret to electret the filter material, the device is more complicated and the cost is higher
Although this method can recharge the nanofiber membrane, it does not indicate which type of electret this method is suitable for, and does not mention the activation time and activation rate of the electret.

Method used

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  • An electromagnetic integrated nanofiber filter material and its preparation and activation method
  • An electromagnetic integrated nanofiber filter material and its preparation and activation method
  • An electromagnetic integrated nanofiber filter material and its preparation and activation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0049] The preparation and rapid activation method of an electromagnetic integrated nanofiber filter material in this embodiment, the specific steps are:

[0050](1) Dry polyvinyl chloride (PVC) powder in a vacuum oven at 60° C. for 2 hours. Accurately weigh 10.9875g N-N dimethylformamide and 10.9875g tetrahydrofuran with an electronic balance and place it in a 50mL beaker, then weigh 0.0250g nanometer magnetic iron oxide (purity 99.5%, average particle diameter 15nm) and place it in the above mixed solvent, Vibrate with an ultrasonic oscillator for 1.5 hours, take out the beaker, accurately weigh 3g of dry polyvinyl chloride powder with an electronic balance, and place it in the beaker. Polyvinyl chloride spinning solution containing magnetic iron oxide nanoparticles.

[0051] (2) use figure 1 The electrospinning equipment shown in the figure performs electrospinning, sticks the cut substrate on the flat receiver, adjusts the electrospinning parameters, the translational sp...

Embodiment 2

[0055] The preparation and rapid activation method of an electromagnetic integrated nanofiber filter material in this embodiment, the specific steps are:

[0056] (1) Dry the chlorinated polyvinyl chloride powder in a vacuum oven at 60° C. for 2 hours. Accurately weigh 10.9875g N-N dimethylformamide and 10.9875g tetrahydrofuran with an electronic balance and place it in a 50mL beaker, then weigh 0.025g nanometer magnetic cobalt oxide (purity 99%, average particle diameter 20nm) and place it in the above mixed solvent, Vibrate with an ultrasonic oscillator for 2 hours, take out the beaker, accurately weigh 3g of dry chlorinated polyvinyl chloride powder with an electronic balance, and place it in the beaker. Chlorinated polyvinyl chloride spinning solution containing magnetic cobalt oxide nanoparticles.

[0057] (2) use figure 1 The electrospinning equipment shown in the figure performs electrospinning, sticks the cut substrate on the flat receiver, adjusts the electrospinnin...

Embodiment 3

[0061] The preparation and rapid activation method of an electromagnetic integrated nanofiber filter material in this embodiment, the specific steps are:

[0062] (1) Dry the polyvinylidene fluoride powder in a vacuum oven at 60° C. for 2 hours. Accurately weigh 21.975g of N-N dimethylformamide with an electronic balance and place it in a 50mL beaker, then weigh 0.025g of nano-magnetic iron oxide (purity 99.5%, average particle size 15nm) and place it in the above solvent, and shake it with an ultrasonic oscillator 1.5h, take out the beaker, accurately weigh 3g of dry polyvinylidene fluoride powder with an electronic balance and place it in the beaker, place the beaker in a water bath constant temperature oscillator for 6 hours, and prepare a uniform and stable magnetic iron oxide at a constant temperature of 40°C Nanoparticles of polyvinylidene fluoride spinning solution.

[0063] (2) use figure 1 The electrospinning equipment shown in the figure performs electrospinning, s...

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Abstract

The invention belongs to the technical field of air purification material and discloses an electromagnetic integrated nanofiber filter material and a preparation and activation method thereof. The preparation and activation method comprises the following steps: adding magnetic oxide nanoparticles into a solvent, carrying out ultrasonic concussion and uniform dispersion, adding strong-polar polymer and uniformly dissolving to obtain a polymer spinning solution containing the magnetic oxide nanoparticles, making the polymer spinning solution onto a substrate through an electrospinning technique to obtain the electromagnetic integrated nanofiber filter material; putting the filter material as a barrier medium into a high-voltage electric field when surface potential of the nanofiber filter material is attenuated to 0-0.1 KV, treating by introducing 5-35 KV high voltage for 5-300 s to obtain the activated nanofiber filter material. The electromagnetic integrated nanofiber filter material has both surface electric field and magnetic field and can greatly achieve the effect of high efficiency and low resistance when being used as an air filter material.

Description

technical field [0001] The invention belongs to the technical field of air purification materials, and in particular relates to an electromagnetic integrated nanofiber filter material and a preparation and activation method thereof. Background technique [0002] High-performance filter materials must have the characteristics of high efficiency and low resistance, but conventional filter materials rely solely on mechanical capture mechanisms to filter particles, usually with high efficiency and high pressure resistance. The electret fiber filter material introduces electrostatic adsorption on the basis of the original mechanical filtration, which can greatly improve the particle capture efficiency under the same pressure resistance. [0003] The traditional electret fiber filter material has problems such as poor charge storage stability, rapid surface charge decay, long-term use, a sharp drop in filtration performance, and complicated electret process, which greatly affect t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/48D01F6/46D01F6/90D01F6/92D01F6/94D01F1/10D04H1/728D06M10/00D06M101/32D06M101/34D06M101/20D06M101/28
Inventor 张立志高雪蔡容容
Owner SOUTH CHINA UNIV OF TECH
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