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Composite fiber film which can be used for high-efficiency low-resistance smog prevention mask and preparation method

A composite fiber membrane, anti-haze technology, applied in chemical instruments and methods, applications, protective clothing, etc., can solve the problems of sudden drop in filtration efficiency, large resistance, low filtration efficiency, etc., to reduce resistance, promote expansion and water absorption, The effect of improving filtration efficiency

Active Publication Date: 2019-04-05
山东蓝色时光新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large fiber diameter and large pore size between fibers, these materials have low filtration efficiency and relatively large resistance.
In addition, poor filtration of oily particles such as melt-blown cotton will result in a sudden drop in filtration efficiency

Method used

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  • Composite fiber film which can be used for high-efficiency low-resistance smog prevention mask and preparation method
  • Composite fiber film which can be used for high-efficiency low-resistance smog prevention mask and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation of embodiment 1 mask A

[0047] 1. Preparation of porous nanofiber membrane: PLGA and PCL are dissolved in dichloromethane and N.N dimethylformamide according to the mass ratio of 1:3, and the polymer mass fraction is 12%, wherein N.N dimethylformamide accounts for the mixed 2% of the mass of the solvent, fully stirred evenly, and then divided into two bottles, respectively added citric acid and sodium chlorite with a mass ratio of 5%, and then stirred to disperse evenly. Adding 2% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the expansion of nanofibers to absorb water and accelerate the reaction; then the solution is at a spinning voltage of 70kv, a spinning distance of 20cm, and a spinning flow rate of 600ml / h, electrospun at a temperature of 25° C. and a relative humidity of 85% for a period of time to obtain a porous nanofibrous membrane 3 .

[0048]2. Preparation of composite fiber membrane: a three-layer structure ...

Embodiment 2

[0050] The preparation of embodiment 2 mouth mask B

[0051] 1. Preparation of porous nanofiber membrane: PLGA and PCL are dissolved in dichloromethane and N.N dimethylformamide according to the mass ratio of 3:1, and the mass fraction of the polymer is 8%, wherein N.N dimethylformamide accounts for the mixed 2% of the mass of the solvent, fully stirred evenly, and then divided into two bottles, respectively added citric acid and sodium chlorite with a mass ratio of 6%, and then stirred to disperse evenly. Adding 4% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the swelling and water absorption of nanofibers and accelerate the reaction; then the solution is at a spinning voltage of 80kv, a spinning distance of 28cm, and a spinning flow rate of 800ml / h, electrospinning at a temperature of 25° C. and a relative humidity of 95% for a period of time to obtain a porous nanofibrous membrane 3 .

[0052] 2. Preparation of composite fiber membrane: a t...

Embodiment 3

[0054] The preparation of embodiment 3 mouth mask C

[0055] 1. Preparation of porous nanofibrous membrane: PLGA and PCL are dissolved in a mixed solvent of dichloromethane and N.N dimethylformamide according to the mass ratio of 1:1, and the mass fraction of the polymer is 10%, wherein N.N dimethylformamide The amide accounts for 5% of the mass of the mixed solvent, stir well, and then divide it into two bottles, add 3% citric acid to the solution in one bottle, add 3% sodium chlorite to the solution in the other bottle, and add 2% sodium chlorite to the polymer solution. % polyvinyl alcohol microspheres are beneficial to promote the expansion and water absorption of nanofibers, accelerate the reaction, and then stir to make them evenly dispersed. Adding 3% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the swelling and water absorption of nanofibers and accelerate the reaction; then the solution is at a spinning voltage of 30kv, a spinning dista...

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Abstract

The invention discloses a composite fiber film which can be used for a high-efficiency low-resistance smog prevention mask. The composite fiber film has a three-layer structure formed by compounding non-woven fabrics, meltblown cottons and a porous nanofiber film through ultrasonic hot pressing, wherein the outer layer is the non-woven fabrics, the middle layer is the meltblown cottons, and the inner layer is the porous nanofiber film; the porous nanofiber film is made of porous nanofibers, the nanofibers have a porous structure, the diameter of the porous nanofibers is 100-900 nm, the diameter of the nanofibers is 50-400 nm, and the humidity responsive intelligent sterilization efficiency is 98-99.9%. The composite fiber film can effectively improve the filtering efficiency of smog and reduce resistance, and has the characteristics of high-efficiency filtering and ultra-low resistance.

Description

technical field [0001] The invention relates to a composite fiber film that can be used for high-efficiency and low-resistance anti-fog masks and a preparation method, and relates to the technical field of environmental protection materials. Background technique [0002] In recent years, with the development of my country's economy, some disadvantages have been brought about. The environment has been destroyed, and the air pollution has become increasingly serious. There was a lot of inconvenience. [0003] Traditional mask materials mainly include melt-blown fibers and short fibers. These materials have low filtration efficiency and relatively large resistance due to the large fiber diameter and large pore size between fibers. In addition, such as melt-blown cotton, which has poor filtration of oily particles, will result in a sudden drop in filtration efficiency. There is a strong demand for new materials with high efficiency and low resistance and double filtration of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/02B32B5/26B32B27/12B32B5/06B32B27/36B32B3/24B32B33/00B32B37/06B32B37/10D04H1/4382D04H1/728D01F8/14A41D13/11A41D31/02A41D31/30
CPCA41D13/1192D01F8/14D04H1/4382D04H1/728B32B3/266B32B5/02B32B5/022B32B5/06B32B5/26B32B27/12B32B33/00B32B37/06B32B37/10B32B2250/20B32B2262/0276B32B2307/724B32B2307/7145Y02A50/30
Inventor 张淼高冬梅朱传武温明昊
Owner 山东蓝色时光新材料有限公司
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