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A kind of preparation method of material for adsorption and purification of PM2.5

A technology of organic fiber and mass ratio, applied in the field of materials, can solve the problems of contradiction between filtration performance and air permeability, small pore structure, poor air permeability, etc., and achieve the effect of easy industrial production, low production cost, and strong adsorption and removal function

Inactive Publication Date: 2016-03-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filtration and purification of suspended particles (including PM2.5) in the air is mainly blocked by multi-layer fibers, and there is a problem of contradiction between filtration performance and air permeability, which cannot be effectively solved
That is, when fine and ultra-fine particles can be effectively filtered (taking PM2.5 as an example), the required fiber layer is thick and dense, and the pore structure of the composition is small, resulting in poor air permeability of the material itself; and when the air permeability is good , but cannot filter out fine and ultrafine particles

Method used

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  • A kind of preparation method of material for adsorption and purification of PM2.5
  • A kind of preparation method of material for adsorption and purification of PM2.5
  • A kind of preparation method of material for adsorption and purification of PM2.5

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Take 20g of pulp fiber and add it to 4L of water, and add 12g of sodium hexametaphosphate to form a uniformly dispersed fiber pulp suspension after stirring, add 6g of wood fiber (30-40mm in length, Heilongjiang coniferous forest wood fiber) , 0.75g polyester fiber, and fully stir evenly.

[0035] 2. Take 500ml of the above-mentioned suspension (after fully stirring evenly, the fiber concentration will be constant, and the fiber amount will be determined when a certain amount of suspension is taken, that is, 3.34g), and use a mesh sieve to take the organic matter in the mixed suspension. Fiber, add 6.7g of opal mineral powder and mix well.

[0036] 3. After stirring evenly, take out the fibers attached to the opal powder and spread them flat, and dehydrate and dry them in a 120°C drying oven. The thickness of the product after drying is 0.1mm. Take out the sample (see photo of the sample figure 2 ), the adhesive film (polyester adhesive film, pore size 3um) is att...

Embodiment 2

[0038] 1. Take 20g of pulp fiber and add it to 6L of water, and add 24g of sodium hexametaphosphate to form a uniformly dispersed fiber slurry suspension after stirring, add 10g of wood fiber, 0.9g of polypropylene fiber (length is 5 ~ 20mm), and Stir well to combine.

[0039] 2. Take 1000ml of the above suspension, use a mesh sieve to take the organic fiber in the mixed suspension (the dry weight of the fiber is 5.15g at this time), add 11g of opal powder, and mix well.

[0040] 3. After stirring evenly, remove and smooth the fibers attached to the opal powder, dehydrate and dry in a 100°C drying oven, and the thickness of the product after drying is 0.2mm. The sample was taken out, and an adhesive film (polyester adhesive film, pore size 3 μm) was attached to both sides of the sample.

Embodiment 3

[0042] 1. Take 15g of pulp fiber and add it to 2L of water, and add 7g of sodium hexametaphosphate to form a uniformly dispersed fiber slurry suspension after stirring, add 0.45g of polypropylene fiber (5-20mm in length), 0.3g of polyester fiber ( The length is 15 ~ 50mm), and fully stir evenly.

[0043] 2. Take 800ml of the above suspension, at this time the dry weight of the fiber is 6.3g, use a mesh sieve to sieve the organic fiber in the mixed suspension, add 12.5g of opal powder, and mix well.

[0044] 3. After stirring evenly, remove and smooth the fibers attached to the opal powder, and dehydrate and dry them in a drying oven at 100°C. Take out the sample, and the thickness of the product after drying is 0.3mm. Adhesive films (polyester adhesive films, pore size 3 μm) were attached to both sides of the sample.

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Abstract

The invention provides a method for preparing a material for adsorptive purification of PM2.5. The method comprises the steps that (1) pulp fibers are added to water, sodium hexametaphosphate is also added, other organic fibers are added after stirring and dispersing, and stirring is conducted sufficiently and evenly, so that organic fiber mixed turbid liquid is obtained; (2) a proper amount of the organic fiber mixed turbid liquid which is evenly mixed is obtained, an organic fiber mixture is screened out through a mesh screen, and opal mineral powder is added to the organic fiber mixture; (3) fibers with the opal powder is screened out and is smoothened after even stirring, and the fibers with the opal powder is dewatered and dried in a drying box at the temperature of 100-120 DEG C. The fiber filter material with the absorbing function is prepared with the method, the material has the high capacity to adsorb and remove micro particles and supermicro particles in air and is high in breathability, and the PM2.5 removal rate can reach 88.5%. According to the method, production cost is low, operation processes are simple, industrial production can be achieved easily, and the requirement for adsorptive purification in hazy weather can be met.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of a fiber-containing material. Background technique [0002] Air PM2.5 refers to particulate matter in the air with an equivalent diameter less than or equal to 2.5 microns. Removing such particles is an essential part of cleaning the air. [0003] At present, the filter materials used for air PM2.5 purification are mainly porous fibers, and polypropylene and polyester fiber non-woven fabrics are the best. Its microstructure is a porous fiber film composed of fibers with a diameter of 50-100 nm and a length of 10-20 μm. The filtration and purification of suspended particles (including PM2.5) in the air is mainly blocked by multi-layer fibers. There is a problem of contradiction between filtration performance and air permeability, which cannot be effectively solved. That is, when fine and ultrafine particles can be effectively filtered (taking PM2.5 as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/02
Inventor 杜玉成王金淑孙靖忠孙广兵郑广伟刁广祥曹辉任象玉
Owner BEIJING UNIV OF TECH
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