Protective coating, filter material, matrix, and preparation method for protective coating

A technology of protective coating and filter material, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problem of low adsorption force of polytetrafluoroethylene and filter material fibers, limited effect of improving filter material life, and can not be completely protected. Filter fiber and other problems, to achieve the effect of strong binding force, improved coverage and low surface energy

Active Publication Date: 2016-10-05
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are two important shortcomings in the existing PTFE impregnation technology. One is that the coverage of PTFE is low, and the filter fiber cannot be completely protected; the other is that the adsorption force between PTFE and the filter fiber is small. Vinyl is easy to fall off
Therefore, the current technology has a limited effect on improving the life of the filter material.

Method used

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  • Protective coating, filter material, matrix, and preparation method for protective coating
  • Protective coating, filter material, matrix, and preparation method for protective coating
  • Protective coating, filter material, matrix, and preparation method for protective coating

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preparation example Construction

[0019] Please refer to figure 1 , the embodiment of the present invention provides a kind of preparation method of protective coating, it comprises the following steps:

[0020] Step 1: Prepare mixed solution a so that it contains 1-50 g / L polyelectrolyte and 0.01-2 mol / L strong electrolyte;

[0021] Step 2: forming the mixed solution a on the surface of a substrate and the microstructure inside the substrate, and drying the substrate;

[0022] Step 3: Take 50~100 parts of polytetrafluoroethylene nanoparticle dispersion liquid with a mass fraction of 2%~15%, and mix 0~50 parts of polystyrene nanoparticle dispersion liquid with a mass fraction of 1%~10%, and Stirring or ultrasonic dispersion to obtain the mixed liquid b;

[0023] Step 4: forming the mixed liquid b on the surface of the substrate and the microstructure inside the substrate, and drying the substrate;

[0024] Step 5: Bake at 160-220°C to melt the polystyrene particles and solidify the polytetrafluoroethylene p...

Embodiment 1

[0044] Configure mixed solution a so that it contains 10 g / L polyelectrolyte and 0.1 mol / L sodium chloride, the polyelectrolyte is a mixed solution composed of polyallylamine hydrochloride and polyvinylamine in a volume ratio of 3:1; Submerge the polyphenylene sulfide filter cloth completely in the mixture a, deposit for 15 minutes, then take the polyphenylene sulfide filter cloth out of the mixture a, and dry it with hot air at 70°C until it is completely dried; take 80 Parts (volume fraction) mass fraction is 4% polytetrafluoroethylene dispersion liquid, 20 parts mass fraction is the polystyrene dispersion liquid of 2%, is configured as mixed solution b, and described polytetrafluoroethylene nano particle diameter is 200nm , the particle size of the polystyrene nanoparticles is 50nm; the dried polyphenylene sulfide filter cloth is immersed in the mixed liquid b, and after standing for 15 minutes, it is thoroughly dried with hot air at a temperature of 70°C; the dried Put the...

Embodiment 2

[0046] Configure mixed solution a so that it contains 20g / L polyelectrolyte and 0.2 mol / L sodium chloride, the polyelectrolyte is sodium polystyrene sulfonate and polydiallyl dimethyl ammonium chloride in a volume ratio of 1 : a mixed solution composed of 2; completely immerse the polyester filter cloth in the mixed solution a, deposit for 15 minutes, take the polyester filter cloth out of the mixed solution a, and dry it with hot air at a temperature of 70°C until it is completely dried; take 70 Parts (volume fraction) mass fraction is 5% polytetrafluoroethylene dispersion liquid, 30 parts mass fraction is 1% polystyrene dispersion liquid, is configured as mixed solution b, and described polytetrafluoroethylene nano particle diameter is 200nm , the particle size of the polystyrene nanoparticles is 200nm; the dried polyester filter cloth is immersed in the mixed liquid b, and after standing for 15 minutes, it is thoroughly dried with hot air at a temperature of 70°C; the dried ...

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Abstract

The invention relates to a preparation method for a protective coating. The preparation method comprises the following steps: preparing a mixed solution a containing 1 to 50 g/L of polyelectrolyte and 0.01 to 2 mol/L of strong electrolyte; allowing the mixed solution a to be formed on the surface of the matrix and microstructures in the matrix and drying the matrix; mixing 50 to 100 parts of polytetrafluoroethylene nanoparticle dispersion liquid with a mass fraction of 2 to 15% and 0 to 50 parts of polystyrene nanoparticle dispersion liquid with a mass fraction of 1 to 10% and carrying out stirring or ultrasonic dispersion so as to obtain a mixed solution b; allowing the mixed solution b to be formed on the surface of the matrix and the microstructures in the matrix and drying the matrix; and heating the matrix to 160 to 220 DEG C for baking so as to allow polystyrene particles to be fused and polytetrafluoroethylene particles to be cured, and then taking the matrix out for natural cooling. Moreover, the invention also relates to the protective coating, a filter material and the matrix.

Description

technical field [0001] The invention relates to a preparation method of a protective coating, a filter material, a substrate and the protective coating. Background technique [0002] The smog problem has become one of the most serious environmental pollution problems in my country, especially in the Beijing-Tianjin-Hebei region. According to statistics, more than 20% of the PM2.5 that causes smog comes from industrial flue gas emissions, such as thermal power plants, cement plants, waste incineration plants, etc. Therefore, upgrading and upgrading the flue gas purification equipment of flue gas emission enterprises is the key to smog control core tasks. At present, industrial flue gas purification equipment is divided into two categories according to technology: one is electrostatic dust removal technology, and the other is filter bag dust removal technology. The emission concentration of particulate matter in industrial flue gas after electrostatic dust removal is general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/356D06M15/61D06M15/256D06M15/233D06M15/263B01D39/02D06M101/30D06M101/32
Inventor 汪家道杜川陈大融
Owner TSINGHUA UNIV
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