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Preparation method of porous formaldehyde scavenging membrane

A formaldehyde removal and microporous membrane technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of secondary pollution by byproducts, removal of reaction products, and low adsorption efficiency, achieving high reaction efficiency, Effect of increasing specific surface area and low cost

Active Publication Date: 2018-06-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, activated carbon or diatom mud, which is mainly based on physical adsorption, can have a good adsorption effect on indoor formaldehyde, but formaldehyde is only adsorbed on the surface of the material and remains indoors. When the temperature rises, it will regenerate from the material. The surface is desorbed; nanomaterials based on photocatalysis, although they have a good decomposition effect, must be illuminated to achieve the effect, and the by-products after decomposition may cause secondary pollution; formaldehyde based on amino The removal materials are generally spray-based, which will cause certain damage to the wall, furniture, etc., and it is difficult to remove the reaction product by simple wiping; the adsorption method of formaldehyde based on various plants is generally considered to be less efficient. Low, can only play the role of auxiliary adsorption of formaldehyde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Methyltrimethoxysilane, ethylene glycol methyl ether, propylene glycol methyl ether acetate, ethanol, 0.1M hydrochloric acid, cetyltrimethylammonium bromide and water at a ratio of 1:3:2:0.8:0.1:0.005 : Mix at a volume ratio of 1, stir and hydrolyze at 60°C for 6 hours to obtain a silica gel sol-gel solution; prepare a 0.25mol / L neutral red sol-gel solution, and stir evenly. Soak the nitric acid acetate mixed cellulose ester membrane in the prepared solution for 1 hour, take it out, hang it to dry in the air to obtain a porous formaldehyde removal membrane. Place the 10 cm × 10 cm porous formaldehyde removal membrane in an 8-liter airtight glass container, and add a small amount of formaldehyde solution to the container in advance. The real-time concentration of formaldehyde is 8.4mg / m3 detected by the British DART formaldehyde sensor 3 , after placing the porous formaldehyde removal membrane, the sensor shows in real time that the formaldehyde concentration drops to 2....

Embodiment 2

[0034] Mix (3-aminopropyl)triethoxysilane, ethylene glycol methyl ether, propylene glycol methyl ether acetate, ethanol, 0.1M acetic acid, Tween 20 and water at a ratio of 1:3:2:0.8:0.3:0.008: 2 were mixed at a volume ratio, stirred and hydrolyzed at 60°C for 6 hours to obtain a silica gel sol-gel solution; a 0.05 mol / L 1,2-diaminoanthraquinone sol-gel solution was prepared and stirred evenly. Soak the glass fiber membrane in the prepared solution for 1 hour, take it out and hang it to dry to obtain a porous formaldehyde removal membrane. Place the 10 cm × 10 cm porous formaldehyde removal membrane in an 8-liter airtight glass container, and add a small amount of formaldehyde solution to the container in advance. The real-time concentration of formaldehyde is 9.1mg / m3 detected by the British DART formaldehyde sensor 3 , after placing the porous formaldehyde removal membrane, the sensor shows in real time that the formaldehyde concentration drops to 3.7mg / m within 2 minutes 3 ...

Embodiment 3

[0036] Mix (3-chloropropyl)trimethoxysilane, ethylene glycol methyl ether, propylene glycol methyl ether acetate, 0.15M sulfuric acid, L7001 and water at a volume ratio of 1:3:2:0.5:0.05:1, and Hydrolyze for 2 hours to obtain a silica gel sol-gel solution; prepare a 0.15 mol / L lysine sol-gel solution and stir evenly. Soak the cellulose acetate film in the prepared solution for 1 hour, take it out, hang it to dry, and volatilize the organic solvent to obtain a porous formaldehyde removal film. Place the 10 cm × 10 cm porous formaldehyde removal membrane in an 8-liter airtight glass container, and add a small amount of formaldehyde solution to the container in advance. The real-time concentration of formaldehyde is 9.9mg / m3 detected by the British DART formaldehyde sensor 3 , after placing the porous formaldehyde removal membrane, the sensor shows in real time that the formaldehyde concentration drops to 3.9mg / m within 2 minutes3 , fully verified the formaldehyde removal perform...

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PUM

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Abstract

The invention provides a preparation method of a porous formaldehyde scavenging membrane. According to the method, a microporous membrane is used as a support material, a compound containing rich amino groups is immobilized on the support material with a sol-gel or polymer method, micro-nano pores are constructed in the microporous membrane serving as the support material, the specific surface area of the reaction of the amino compound with formaldehyde is further enlarged, and a produced hydroxymethyl derivative has good chemical stability, is non-toxic, odorless and non-volatile and cannot cause secondary pollution. The formaldehyde scavenging membrane is low in cost, can be discarded and can scavenge formaldehyde in closed spaces through reactions. Owing to these characteristics, the prepared formaldehyde scavenging membrane has the advantages of high formaldehyde scavenging speed, high scavenging efficiency, low cost and the like, can be widely applied to household air purifiers, vehicle-mounted air purifiers, wall stickers, decorative frame paintings and the like and has great application value.

Description

technical field [0001] The invention relates to a formaldehyde scavenging membrane, in particular to a preparation method of a porous formaldehyde scavenging membrane. Background technique [0002] Formaldehyde is widely used in production and life. The world's annual production reaches more than 10 million tons, of which a large amount is used to produce phenolic resin, formaldehyde resin and melamine-formaldehyde resin. These resins are widely used in the production of plywood and in paint. Indoor formaldehyde mainly comes from particleboard, density board, plywood and other artificial boards, as well as adhesives and wallpaper, and is one of the main indoor air pollutants. Both the World Health Organization and the U.S. Environmental Protection Agency list formaldehyde as a dangerous carcinogen and an important environmental pollutant. In my country's list of priority control of toxic chemicals, formaldehyde ranks second. Formaldehyde can irritate the human respiratory...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/72
CPCB01D53/72B01D53/81B01D2251/206
Inventor 冯亮
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI