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Preparation method of waterproof and antibacterial double-layer electret electrospun nanofiber composite window screen material

A technology of electrospinning nanofibers and nanofibers, which is applied in fiber processing, textiles, papermaking, nonwovens, etc., can solve the problems of increasing the surface charge density of the jet, unstable jet whipping, poor mechanical properties, etc., and achieve large applications and industrial value, good waterproof and antibacterial effect, and excellent filtration performance

Active Publication Date: 2020-06-09
浙江西大门新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing electret technology such as corona charging technology has disadvantages such as less charge generation and fast charge dissipation.
[0006] The conductivity of the electrospinning solution has a direct impact on the morphology of the fibers, and the increase in conductivity will increase the charge density on the jet surface, resulting in unstable jet whipping, thereby reducing the fiber diameter.
[0007] In summary, although there have been many studies on the preparation of anti-haze screens by electrospinning technology in recent years, due to the defects of low filtration efficiency, poor water resistance, low light transmittance, and poor mechanical properties, there has not been one that really meets the market demand. product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The steps of the preparation method of the waterproof and antibacterial double-layer electret electrospun nanofiber composite window screen material are as follows:

[0024] 1) Triethylphenylammonium chloride, nano-TiO 2 Particle dispersion liquid and high molecular polymer are added to the solvent in turn, stirred evenly under airtight conditions at 80°C to make them fully dissolved, and the nano-TiO 2 Triethylphenylammonium chloride / nano-TiO with a particle mass percentage concentration of 0.0001% to 0.0005% and a polymer mass percentage concentration of 5% to 10% 2 The particle / polymer solution is the spinning solution A, which is ready for use;

[0025] 2) Add the organic electret and the fluorine-containing high molecular polymer into the solvent, and stir evenly under airtight conditions at 80°C to fully dissolve them, and then obtain the organic electret with a mass percentage concentration of 0.01% to 0.05%, The organic electret / fluorine-containing high molecu...

Embodiment 1

[0030] Embodiment 1 (polyacrylonitrile mass percent concentration is the spinning solution A of 5%, and the polyvinylidene fluoride mass percent concentration is the spinning solution B of 5 percent, compound and obtain polyvinyl chloride window screen, wherein two-layer nanofiber gram weight is 5g / m 2 , 5g / m 2 )

[0031] 1) 0.1 gram of triethylbenzene ammonium chloride, 10 grams of nano-TiO with a mass percent concentration of 0.1% 2 The particle dispersion and 500 grams of polyacrylonitrile were added to 9.5 kilograms of N,N-dimethylformamide in turn, and stirred evenly under airtight conditions at 80°C to fully dissolve it to obtain the mass percentage concentration of triethylphenylammonium chloride 0.001%, Nano TiO 2 A solution with a particle mass percentage concentration of 0.0001% and a polyacrylonitrile mass percentage concentration of 5%, for use;

[0032] 2) Slowly add 1 gram of nanoscale polytetrafluoroethylene ultrafine powder and 500 grams of polyvinylidene f...

Embodiment 2

[0038] Embodiment 2 (triethylbenzene ammonium chloride mass percent concentration is 0.003%, nanometer TiO 2 Spinning solution A with particle mass percentage concentration of 0.0003%, polyacrylonitrile mass percentage concentration of 10%, nanoscale polytetrafluoroethylene mass percentage concentration of 0.03%, polyvinylidene fluoride mass percentage concentration of 10% spinning solution B, compound to obtain polyvinyl chloride window screen, wherein the weight of two layers of nanofibers is 10g / m 2 , 20g / m 2 )

[0039] 1) 0.3 gram triethylphenyl ammonium chloride, 30 gram mass percent concentration 0.1% nano-TiO 2 Particle dispersion and 1000 grams of polyacrylonitrile were added to 9.5 kilograms of N,N-dimethylacetamide in turn, stirred evenly under airtight conditions at 80°C to fully dissolve, and the mass percentage concentration of triethylphenylammonium chloride was obtained 0.003%, Nano TiO 2 A solution with a particle mass percentage concentration of 0.0003% an...

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Abstract

The invention discloses a preparing method of a waterproof and antibacterial dual-layer electret electrospinning nanofiber composite window gauze material. By injecting charges in situ before fiber forming of electret fiber, on the condition that free flow of air is not influenced, the intercepting efficiency of superfine particles is further improved, by adding a little amount of triethylbenzeneammonium chloride, the conductivity of a spinning solution is increased, the diameter of the fiber is reduced, and the waterproof performance is improved; meanwhile, nanometer titania is introduced into the system, so that the nanofiber has the functions of bacteria resistance and the like, the method of cylindrical electrode rotating for electrospinning is utilized to obtain the nanofiber compound window gauze material, and the nanofiber compound window gauze material contains base materials and nanofiber layers. By means of the preparing method, a haze-prevention gauze product which is efficient, low in resistance, high in functionality, and high in practical value can be prepared with a low cost, and the market prospect is good.

Description

[0001] field of invention [0002] The invention relates to the field of functional nanofiber materials, in particular to a method for preparing a waterproof and antibacterial electret electrospun nanofiber composite window screen material. Background technique [0003] The air pollution in China and Southeast Asia is serious, making smog a hot topic among the public. More and more public places and households implement cleaning projects to ensure that people can breathe clean air. However, screen windows, the first line of defense, have always been There are no products that can effectively prevent haze, and the existing anti-haze window screens generally have problems such as low filtration efficiency, which cannot meet the requirements of use. Negatively charged dust particles are blocked outside under the action of "negative and negative repulsion"; at the same time, positively charged dust particles are adsorbed on the surface of the gauze, thereby achieving the purpose o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/54D04H1/541D04H1/559D04H1/728D06M13/224D06M13/513
CPCD04H1/54D04H1/541D04H1/559D04H1/728D06M13/224D06M13/513
Inventor 符思敏费辉王龙
Owner 浙江西大门新材料股份有限公司