Compound air filter membrane based on chitosan and graphene oxide and preparation method of compound air filter membrane

A graphene composite, air filter membrane technology, applied in the field of air purification, can solve the problems of limited adsorption capacity of activated carbon, limited sterilization effect, low adsorption efficiency of solid particles, etc.

Active Publication Date: 2017-01-11
江苏新风环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is a porous material with a large specific surface area, but the adsorption capacity of pure activated carbon is limited, and it is easy to saturate
[0006] The above-mentioned existing materials and air purification technologies all have defects in varying

Method used

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  • Compound air filter membrane based on chitosan and graphene oxide and preparation method of compound air filter membrane
  • Compound air filter membrane based on chitosan and graphene oxide and preparation method of compound air filter membrane
  • Compound air filter membrane based on chitosan and graphene oxide and preparation method of compound air filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053] Example 1 Preparation method of composite air filter membrane of chitosan and graphene oxide

[0054] A composite air filter membrane based on chitosan and graphene oxide, which is characterized in that it comprises a sponge carbon membrane; the sponge carbon membrane is composed of chitosan and graphene oxide to form a chitosan composite on the surface of the sponge carbon membrane. Graphene oxide homogeneous film. The preparation steps of the composite air filter membrane of chitosan and graphene oxide are as follows:

[0055] (1) Preparation of sponge carbon film: The foam carbon film is prepared by mixing polyurethane and 200 mesh activated carbon powder at a mass ratio of 3:1 to obtain a sponge carbon film, the compression molding condition is 3Mpa, the temperature is controlled to 210°C, and it is prepared by controlling the compression molding gap. The thickness of the carbon sponge film is 0.4cm, and the micropores of 1-3mm are evenly distributed on the carbon spong...

Example Embodiment

[0061] Example 2 Preparation method of composite air filter membrane of chitosan and graphene oxide

[0062] A composite air filter membrane based on chitosan and graphene oxide, which is characterized in that it comprises a sponge carbon membrane; the sponge carbon membrane is composed of chitosan and graphene oxide to form a chitosan composite on the surface of the sponge carbon membrane. Graphene oxide homogeneous film. The preparation steps of the composite air filter membrane of chitosan and graphene oxide are as follows:

[0063] (1) Preparation of sponge carbon film: The sponge carbon film is prepared by mixing polystyrene and 200 mesh activated carbon powder at a mass ratio of 3:1 to obtain a sponge carbon film. The compression molding condition is 5Mpa and the temperature is controlled to about 210°C. The thickness of the carbon sponge film prepared by the gap is 0.5cm, and the micropores of 1-3mm are evenly distributed on the carbon sponge film prepared in this way;

[00...

Example Embodiment

[0069] Example 3 Organic pollutant absorption test

[0070] Combine Figure 5 The test objects are the sponge carbon membrane prepared in Example 1, and the composite air filter membrane based on chitosan and graphene oxide (hereinafter referred to as the composite membrane) prepared in Example 1, using 3 cubic meters of organic volatile matter absorption test Box, first add organic volatiles such as formaldehyde, toluene and sulfur dioxide to the test box, use the built-in fan to make it completely volatilize, then put the test sample filter membrane, turn on the built-in fan, carry out internal air circulation and convection, use the built-in TVOC detector to detect VOC content, the film’s absorption of TVOC is recorded every 10 minutes. The test data is shown in the table below. The data is processed to obtain the absorption curve of organic volatile pollutants ( Figure 5 ), it can be seen that the absorption rate of the composite membrane is 2-4 times higher than that of the ...

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Abstract

The invention discloses a compound air filter membrane based on chitosan and graphene oxide and a preparation method of the compound air filter membrane. The filter membrane takes a sponge carbon membrane as a substrate, chitosan and graphene oxide are compounded on the sponge carbon membrane, and conjugated bonds and large Pi bonds in chitosan and graphene oxide have relatively strong Pi-Pi accumulative interaction, so that chitosan and graphene oxide can be firmly compounded on the surface of the sponge carbon membrane without the presence of an adhesive; the surfaces of chitosan and graphene oxide have relatively strong static charges, so that solid particle pollution in the air can be adsorbed through a static adsorption effect; meanwhile, due to the presence of graphene oxide, surface micro-structures appear as micro-pores and folds of 0.1-0.8mu m, so that solid particles, including fungi, bacteria, viruses and the like, can be quickly adsorbed; and because graphene oxide has a relatively large specific surface area and has relatively strong interaction with organic pollution gas, graphene oxide has very high adsorption and suction capabilities for organic pollution gas.

Description

technical field [0001] The invention relates to the field of air purification, in particular to a composite air filter membrane based on chitosan and graphene oxide and a preparation method thereof. Background technique [0002] Chitosan (chitosan), also known as deacetylated chitin, is obtained by deacetylation of chitin (chitin), which exists widely in nature, and its chemical name is polyglucosamine (1-4)-2-amino-B-D glucose. . The excellent properties of chitosan, such as biofunctionality, compatibility, blood compatibility, safety, and microbial degradation, have attracted wide attention from all walks of life. It is widely used in medicine, food, chemical industry, cosmetics, water treatment, metal extraction and recovery, Significant progress has been made in applied research in many fields, including biochemical and biomedical engineering. Chitosan and its derivatives are easy to dissolve in weak acid solvents, and the dissolved solution contains amino groups (NH2+...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00B01D71/74B01D46/54B01D53/22A61L9/16A61L9/00A61L101/04
CPCA61L9/00A61L9/16B01D46/0032B01D46/0036B01D46/543B01D53/228B01D53/229B01D67/0079B01D69/12B01D71/021B01D71/74B01D2257/70B01D2257/91B01D2258/06
Inventor 陶猛薛斌
Owner 江苏新风环保科技有限公司
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