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Electrifying nanofiber filter material for fresh air system and preparation method thereof

A nanofiber, fresh air system technology, applied in filtration and separation, membrane filters, separation methods, etc., can solve problems such as easy failure service life, limiting the effect of fresh air system on air quality improvement, etc.

Pending Publication Date: 2019-04-09
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

The fresh air system has a great impact on the control of indoor air quality. At present, most of the filter materials used in the fresh air system are melt-blown filter materials, which are prone to failure and short service life in high-humidity environments, which seriously limits the impact of the fresh air system on air quality. Improvement effect

Method used

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  • Electrifying nanofiber filter material for fresh air system and preparation method thereof
  • Electrifying nanofiber filter material for fresh air system and preparation method thereof
  • Electrifying nanofiber filter material for fresh air system and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A preparation method of an electret nanofiber filter material for a fresh air system, the 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 liquid mixture having a polymer dissolved in a mass concentration of 22% to 50° C., and the liquid mixture having a polymer dissolved in a spinneret hole is rapidly heated and solidified during the electrospinning process, Among them, rapid heating and curing means that the liquid mixture dissolved in polymer is heated to 153°C within 0.3ms at the exit 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 inst...

Embodiment 2～24

[0061] A kind of preparation method of electret nanofiber filter material for fresh air system, 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 / m 2 , 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]

[0064]

Embodiment 25

[0066] A preparation method of an electret nanofiber filter material for a fresh air system, the specific steps are as follows:

[0067] (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;

[0068](2) Electrospinning is carried out after heating the liquid mixture having a polymer dissolved in a mass concentration of 36% to 85° C. During the electrospinning process, the liquid mixture having a polymer dissolved in a spinneret hole is rapidly heated and solidified, Among them, rapid heating and curing means that the liquid mixture dissolved in polymer is heated to 220°C within 0.1ms at the exit 4cm of the spinneret hole. The process parameters of electrospinning are: voltage 20KV, receiving distance 10cm, perfusion speed 5.2mL / h, the temperature is 15°C, and the humidity is 60%;

[0069] (3) The fiber obtained by electrospinning is instantly cool...

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Abstract

The invention relates to an electrifying nanofiber filter material for a fresh air system and a preparation method thereof. The preparation method comprises the step of carrying out electrostatic spinning on a liquid mixture in which a polymer is dissolved to obtain the electrifying nanofiber filter material for the fresh air system, wherein the liquid mixture with the polymer dissolved therein atan outlet of a spinneret orifice is rapidly heated and solidified in the electrostatic spinning process; the rapid heating and solidification mean that the liquid mixture with the polymer dissolved therein is heated to T within 0.1 to 0.9 ms at a position far away from the outlet of the spinneret orifice by 3-5cm, and T is greater than or equal to the boiling point of a solvent in the liquid mixture with the polymer dissolved thereinto. The surface electrostatic potential of the final product is 1700-2300V, the hydrophobic angle is greater than 150 DEG C, the piezoresistance is less than 20Pa, and after the product is saved for one mouth, the electric charge does not weaken. The preparation method is simple and low in cost, and has low requirements on equipment; the prepared fresh air system adopts the electrifying nanofiber filter material and has a good electrifying effect, an excellent filtering performance and broad application prospect.

Description

technical field [0001] The invention belongs to the field of fiber electret materials, and relates to an electret nanofiber filter material for a fresh air system 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 parti...

Claims

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Application Information

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IPC IPC(8): B01D39/02B01D39/04D01F6/06D01F6/62D01F6/16
CPCB01D39/02B01D39/04B01D2239/0435B01D2239/0622B01D2239/0631B01D2239/10D01F6/06D01F6/16D01F6/62
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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