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Electret nano fiber filter material for air purifier and preparation method thereof

An air purifier and nanofiber technology, which is applied in the field of electret nanofiber filter materials for air purifiers and their preparation, can solve the problems of limiting the air purifier's improvement effect on air quality, poor stability, and space charge dissipation.

Pending Publication Date: 2019-02-22
嘉兴富瑞邦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are "An Electrospinning Nanofiber Electret Filter Material and Its Preparation Method (ZL201410452788.X)" and "An Electrospinning / Electret for Purifying PM2.5". Composite fiber filter material and its preparation method (CN201610998771.3)", "A highly wear-resistant electrospun / electret composite fiber membrane filter material and its preparation method (CN201610846156.0)", but the above preparation methods all have static electricity During the spinning process, problems such as long jet solidification time and a large amount of solvent residue lead to a large amount of charge dissipation before fiber solidification, and the slow volatilization of residual solvent after charge solidification leads to depolarization of dipolar polarized charges and further dissipation of space charges, which eventually leads to Poor electret effect and poor stability
[0005] Modern people work and live indoors, and there are many people in the room. Air purifiers are often used to improve indoor air quality. At present, most of the filter materials used in air purifiers are melt-blown filter materials, which are prone to failure and use in high-humidity environments. Short lifespan, which severely limits the improvement effect of air purifiers on air quality

Method used

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  • Electret nano fiber filter material for air purifier and preparation method thereof
  • Electret nano fiber filter material for air purifier and preparation method thereof
  • Electret nano fiber filter material for air purifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of preparation method of electret nanofiber filter material for air purifier, its specific steps are as follows:

[0054] (1) Prepare a liquid mixture in which the polymer is dissolved: add polyvinylidene fluoride to N,N-dimethylformamide, and continuously stir for 11 hours with a magnetic stirring device;

[0055] (2) Electrospinning is carried out after heating the polymer-dissolved liquid mixture with a mass concentration of 22% to 50°C, and the polymer-dissolved liquid mixture in the spinneret hole is rapidly solidified during the electrospinning process, wherein Rapid solidification means that the liquid mixture dissolved in polymer is heated to 153°C within 0.3ms at the outlet 3cm of the spinneret hole. The process parameters of electrospinning are: voltage 50KV, receiving distance 20cm, and infusion speed 0.1mL / h , the temperature is 20°C, and the humidity is 55%;

[0056] (3) The fiber obtained by electrospinning is instantly cooled to below 0°C after be...

Embodiment 2～24

[0061] A kind of preparation method of electret nanofiber filter material for air purifier, its specific steps are consistent with embodiment 1, difference is the kind of polymer and solvent selected when step (1) prepares the liquid mixture that dissolves polymer and The performance of the final product is shown in the table below. In the table, A represents the surface electrostatic potential, B represents the filtration efficiency of particles of 0.006-1 μm, the unit of fiber diameter is μm, and the unit of pore size is μm; the nanofiber layer The unit of nanofiber diameter is μm, and the unit of nanofiber weight is g / m2 , the unit of porosity is %; the unit of A is V, the unit of hydrophobic angle is (°), the unit of B is %, the unit of piezoresistance is Pa, and the unit of dust holding capacity is g / m 2 :

[0062]

[0063]

Embodiment 25

[0065] A kind of preparation method of electret nanofiber filter material for air purifier, its specific steps are as follows:

[0066] (1) Prepare a liquid mixture in which the polymer is dissolved: add polyvinylidene fluoride to N-methylpyrrolidone, and continuously stir for 18 hours with a magnetic stirring device;

[0067] (2) Electrospinning is carried out after heating the polymer-dissolved liquid mixture with a mass concentration of 36% to 85°C, and the polymer-dissolved liquid mixture in the spinneret hole is rapidly solidified during the electrospinning process, wherein Rapid solidification means that the liquid mixture dissolved in polymer is heated to 220°C within 0.1ms at the outlet 4cm of the spinneret hole. The process parameters of electrospinning are: voltage 20KV, receiving distance 10cm, and infusion speed 5.2mL / h , the temperature is 15°C, and the humidity is 60%;

[0068] (3) The fiber obtained by electrospinning is instantly cooled to below 0°C after bein...

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Abstract

The invention relates to an electret nano fiber filter material for an air purifier and a preparation method thereof. The preparation method comprises conducting rapid heating solidification, rapid cooling solidification or rapid stage heating solidification on a liquid mixture with a dissolved polymer at a spinneret orifice outlet in an electrospinning process obtain the electret nano fiber filter material for the air purifier. The rapid heating solidification means that the temperature rises to T1 within 0.1-0.9ms at the position 3-5cm away from the spinneret orifice outlet, and T1 is largerthan or equal to the solvent boiling point t. The rapid cooling solidification means that the temperature drops to -40 to -20 DEG C within 0.1-0.9ms at the position 3-5cm away from the spinneret orifice outlet. The rapid stage heating solidification means that the temperature rises to t / 2+ / -5 DEG C within 0.1-0.9ms at the position 3-5cm away from the spinneret orifice outlet, and the temperaturerises to 3 / 4*t+ / -10 DEG C within 0.1-0.9 ms at the position 9-10cm away from the spinneret orifice outlet. The material is simple in preparation method, and a product finally prepared can be stored for one month without charge decay.

Description

technical field [0001] The invention belongs to the field of fiber electret materials, and relates to an electret nanofiber filter material for an air purifier and a preparation method thereof. Background technique [0002] High-performance electrospun nanofiber filter materials need to have the characteristics of high efficiency and low resistance, but conventional filter materials rely on the structural characteristics of the material itself (pore size, packing density, etc.) to achieve effective filtration of particles, usually in high-efficiency At the same time, it also has a high pressure resistance, resulting in poor filtration performance. Therefore, it is difficult to achieve an effective balance between filtration efficiency and pressure resistance, as well as high efficiency and low resistance only by the structural characteristics of the fiber itself. The introduction of electrostatic adsorption (electret material) can greatly improve the interception of particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/04D01F6/12D01F6/06D01F6/62D01F6/16D01F6/76D01F6/66D01F6/18D01F6/20D01F6/50D01F1/10
CPCB01D39/04B01D2239/0435B01D2239/0631B01D2239/10B01D2258/06D01F1/10D01F6/06D01F6/12D01F6/16D01F6/18D01F6/20D01F6/50D01F6/62D01F6/66D01F6/76
Inventor 赵兴雷蒋攀华婷姜宗志
Owner 嘉兴富瑞邦新材料科技有限公司
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