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Air purification filter membrane not prone to hole blockage and preparation method

A technology for air purification and membrane filtration, which is applied to chemical instruments and methods, separation methods, and dispersed particle filtration, etc. It can solve problems such as reduced filtration efficiency, clogged membrane pores, and shortened service life, and achieves the effect of preventing clogging

Inactive Publication Date: 2020-08-25
成都其其小数科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the air purification filter membrane is used for a certain period of time, particles will be adsorbed and deposited on the surface of the membrane and in the pores of the membrane, resulting in clogging of the membrane pores and reduced filtration efficiency.
The particles on the surface of the membrane can be removed by cleaning, etc., but the particles in the membrane pores are difficult to remove by conventional methods, which will eventually lead to the failure of the filter membrane and shorten the service life

Method used

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  • Air purification filter membrane not prone to hole blockage and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Take a stainless steel plate with a thickness of 3 mm, clean the surface, and then use a laser to drill dense frustum-shaped concave holes on the surface of the steel plate, and clean it again; the depth of the frusto-conical concave holes is 20 μm, and the diameter of the upper surface is 3μm, the diameter of the lower surface is 1.5μm, and the distance between the center points of adjacent concave holes is 3μm;

[0029] (2) Dissolve trimesic acid and p-hydroxypyridine in absolute ethanol to obtain solution A, and dissolve silver nitrate in absolute ethanol to obtain solution B; in solution A, dissolve trimesic acid, p-hydroxypyridine, anhydrous The mass ratio of ethanol is 1.2:12:100; in solution B, the mass ratio of silver nitrate and absolute ethanol is 1:100;

[0030] (3) Place the side of the steel plate with the concave hole up, first spray solution A on the surface of the steel plate, and then spray solution B on the surface of the steel plate, the spray mas...

Embodiment 2

[0033] (1) Take a stainless steel plate with a thickness of 3 mm, clean the surface, and then use a laser to drill dense frustum-shaped concave holes on the surface of the steel plate, and clean it again; the depth of the frusto-conical concave holes is 20 μm, and the diameter of the upper surface is 3μm, the diameter of the lower surface is 1.5μm, and the distance between the center points of adjacent concave holes is 3μm;

[0034] (2) Dissolve trimesic acid and p-hydroxypyridine in absolute ethanol to obtain solution A, and dissolve silver nitrate in absolute ethanol to obtain solution B; in solution A, dissolve trimesic acid, p-hydroxypyridine, anhydrous The mass ratio of ethanol is 1.4:12:100; in solution B, the mass ratio of silver nitrate and absolute ethanol is 2:100;

[0035](3) Place the side of the steel plate with the concave hole upwards, first spray solution A on the surface of the steel plate, and then spray solution B on the surface of the steel plate, the spray...

Embodiment 3

[0038] (1) Take a stainless steel plate with a thickness of 3 mm, clean the surface, and then use a laser to drill dense frustum-shaped concave holes on the surface of the steel plate, and clean it again; the depth of the frusto-conical concave holes is 20 μm, and the diameter of the upper surface is 3μm, the diameter of the lower surface is 1.5μm, and the distance between the center points of adjacent concave holes is 3μm;

[0039] (2) Dissolve trimesic acid and p-hydroxypyridine in absolute ethanol to obtain solution A, and dissolve silver nitrate in absolute ethanol to obtain solution B; in solution A, dissolve trimesic acid, p-hydroxypyridine, anhydrous The mass ratio of ethanol is 1.3:11:100; in solution B, the mass ratio of silver nitrate and absolute ethanol is 1.5:100;

[0040] (3) Place the side of the steel plate with the concave hole up, first spray solution A on the surface of the steel plate, and then spray solution B on the surface of the steel plate, the spray m...

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Abstract

The invention relates to the technical field of air purification materials, and provides an air purification filter membrane not prone to hole blockage and a preparation method. The surface of a stainless steel plate is firstly etched by using laser to form dense circular truncated cone-shaped concave holes; a polyfluortetraethylene plate with circular-truncated-cone-shaped bulges on the surface is prepared by taking a steel plate as a template; by taking the polyfluortetraethylene plate as a template, then a bacterial cellulose membrane is formed on the surface of the template, and the thickness of the membrane is controlled to be smaller than the depth of circular-truncated-cone-shaped concave holes, so as to obtain the bacterial cellulose porous membrane with the gradually-changed porediameter. The bacterial cellulose membrane is provided with dense through micropores with gradually changed pore diameters, so that particles entering membrane pores from one side with small pore diameters are easily discharged from one side with large pore diameters, and the membrane pores are effectively prevented from being blocked.

Description

technical field [0001] The invention belongs to the technical field of air purification materials and provides an air purification filter membrane which is not easy to block holes and a preparation method thereof. Background technique [0002] With the rapid development of industries such as electric power, building materials, metallurgy, and chemical industry, air pollution is becoming more and more serious, and smog is a common pollution phenomenon at present. Studies have shown that the concentration of PM2.5 particles has a non-negligible relationship with the morbidity and mortality of respiratory system and cardiopulmonary diseases. The main schemes to control haze pollution are pollutant source control and gas terminal filtration. At present, there are problems such as slow effect and difficult supervision of source treatment, and terminal filtration has become an important way for people to obtain clean air. [0003] The air filter membrane can be used for terminal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/54B01D67/00B01D71/10B01D71/36
CPCB01D46/543B01D67/0011B01D71/10B01D71/36
Inventor 蒋涛
Owner 成都其其小数科技有限公司