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Glass fiber filter material with positive Zeta potential and preparation method and application thereof

A technology of filter material and glass fiber, which is applied in the field of glass fiber filter material and preparation, can solve the problems such as the decrease of interlayer binding force and filtration effect, and achieve the effect of excellent industrialization prospect, long service life, and simple and easy preparation method

Inactive Publication Date: 2021-12-03
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defect of the existing composite filter paper that the filtering effect is reduced due to the limited interlayer bonding force, thereby providing a glass fiber filter material with a high filtration efficiency and a positive Zeta potential

Method used

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  • Glass fiber filter material with positive Zeta potential and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0046]The present embodiment provides a kind of preparation method of the glass fiber composite filter material with positive Zeta potential, comprises the steps:

[0047] (1) Mix microfiber glass wool with a knock-down degree of 39° and glass fiber chopped strands with a diameter of 10 μm in a mass ratio of 80:20, add water and acetic acid, and stir evenly with a high-frequency decomposer to obtain a mass percent concentration 0.5wt% fiber slurry with a pH of 5;

[0048] (2) Filtering and removing slag from the fiber slurry, and diluting with water to obtain a suspension with a mass percent concentration of 0.1 wt%, and forming and dehydrating it by a Fourdrinier machine to obtain a glass fiber wet paper sheet;

[0049] (3) Place the same kind of PET non-woven fabric (30g / m2) on the upper and lower surfaces of the glass fiber wet paper sheet 2 ), using tank sizing to immerse the glass fiber wet paper sheets with PET non-woven fabrics placed on the upper and lower surfaces re...

Embodiment 2

[0051] The present embodiment provides a kind of preparation method of the glass fiber composite filter material with positive Zeta potential, comprises the steps:

[0052] (1) adding water and acetic acid to the microfiber glass wool with a degree of percussion of 34°, stirring evenly through a high-frequency disintegrating machine to obtain a fiber slurry with a mass percentage concentration of 2wt% and a pH of 3;

[0053] (2) Filtering and removing slag from the above-mentioned fiber slurry and diluting with water to obtain a suspension with a mass percentage concentration of 0.5 wt%, which is formed and dehydrated by a Fourdrinier machine to obtain a glass fiber wet paper sheet;

[0054] (3) Adopt the mode of spray sizing, uniformly coat the cationic melamine formaldehyde emulsion that solid content is 5% on the surface of above-mentioned glass fiber wet paper sheet, dry 30min at 100 ℃, obtain glass fiber filter material, this glass fiber filter The material includes a gla...

Embodiment 3

[0057] The present embodiment provides a kind of preparation method of the glass fiber composite filter material with positive Zeta potential, comprises the steps:

[0058] (1) Mix microfiber glass wool with a knock-down degree of 39° and carbon fiber chopped strands with a diameter of 12 μm in a mass ratio of 95:5, then add water and polyacrylamide emulsion accounting for 0.05% of the fiber slurry mass, after high-temperature Stir with a frequency decontamination machine to obtain a fiber slurry with a mass percentage concentration of 5wt%;

[0059] (2) Filtering and removing slag from the above-mentioned fiber slurry and diluting with water to obtain a suspension with a mass percentage concentration of 1 wt%. After forming and dehydrating by a fourdrinier machine, a glass fiber wet paper sheet is obtained;

[0060] (3) The horizontal roller sizing method adopted is uniformly coated with a cationic epoxy emulsion with a solid content of 1% on the surface of the above-mentione...

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Abstract

The invention relates to the field of filtration and separation, and discloses a glass fiber filter material with positive Zeta potential and a preparation method and application thereof. The glass fiber filter material with the positive Zeta potential comprises a glass fiber filter material body and a cation protection film wrapping the surface of the glass fiber filter material body, the cation protection film endows the surface of the filter material with positive electricity, and a strong adsorption effect on negative charge particles is realized so that the glass fiber filter material not only can intercept particles of which the size is larger than the pore diameter, but also can adsorb particles of which the size is smaller than the pore diameter, and the filtering efficiency of the filter material is greatly improved. In water with the pH value of 7, the positive Zeta potential on the surface of the glass fiber filter material is as high as 200mV, and the filtering efficiency on solid particles with the size of 1 mu m is as high as 99.3%.

Description

technical field [0001] The invention relates to the field of filtration and separation, in particular to a glass fiber filter material with positive Zeta potential, a preparation method and an application thereof. Background technique [0002] As we all know, filtration is the use of porous media to remove contaminants from fluids (liquids or gases) to achieve a desired level of cleanliness. Filtration accuracy is the ability of the filter medium to block solid particles during use, and is an important indicator for evaluating filter performance. For fiber filter materials with a single-layer structure, the filtration accuracy can generally be improved by using fine-diameter fibers to reduce the pore size, but this will increase the pressure drop of the filter material, reduce the dirt-holding capacity of the filter material, and result in a decrease in filtration efficiency. , thereby shortening the service life of the filter. [0003] For this reason, Chinese patent docu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21H27/30D21H13/40D21H13/14D21H13/24D21H13/18D21H13/26D21H19/14D21H19/28D21H19/30D21H19/20D21H21/08B01D39/20B32B29/00B32B27/02B32B27/10B32B27/36B32B27/32B32B27/34B32B27/40B32B27/30B32B27/04B32B7/12B32B37/12B32B37/10B32B38/16B32B38/08B32B37/24B32B37/06B32B37/08B32B37/00B32B38/00
CPCD21H27/08D21H27/30D21H13/40D21H13/14D21H13/24D21H13/18D21H13/26D21H19/14D21H19/28D21H19/30D21H19/20D21H21/08B01D39/2017B32B29/00B32B29/02B32B5/022B32B7/12B32B37/1284B32B37/10B32B38/164B32B38/08B32B37/24B32B37/06B32B37/08B32B37/00B32B38/0012B32B2037/243B32B2250/40B32B2255/12B32B2255/26B32B2255/02B32B2260/023B32B2260/028B32B2260/046B32B2262/0284B32B2262/0261B32B2262/0253B32B2262/0292
Inventor 石玉强姚嘉兰杨超钱慧李建吴耀春
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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