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A kind of composite air filter membrane based on chitosan and graphene oxide and preparation method thereof

An air filter membrane and chitosan technology, applied in the field of air purification, can solve the problems of low solid particle adsorption efficiency, high cost, and limited sterilization effect

Active Publication Date: 2020-03-31
江苏绿点环保科技有限公司
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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 degrees, such as high cost, low solid particle adsorption efficiency, and limited sterilization effect. Therefore, it is urgent to develop a cost-controllable composite air filter membrane for use in Indoor air purification, improving people's living environment quality

Method used

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  • A kind of composite air filter membrane based on chitosan and graphene oxide and preparation method thereof
  • A kind of composite air filter membrane based on chitosan and graphene oxide and preparation method thereof
  • A kind of composite air filter membrane based on chitosan and graphene oxide and preparation method thereof

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Effect test

Embodiment 1

[0053] The preparation method of the composite air filter membrane of embodiment 1 chitosan and graphene oxide

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

[0055] (1) Preparation of sponge carbon film: Polyurethane and 200-mesh activated carbon powder were mixed and compression-molded at a mass ratio of 3:1 to obtain a sponge carbon film. The compression-molding condition was 3Mpa, the temperature was controlled at 210°C, and the preparation was obtained by controlling the compression-molding gap. The thickness of the carbon sponge film is 0.4cm, and the micropores of 1-3mm are evenly distribu...

Embodiment 2

[0061] The preparation method of the composite air filter membrane of embodiment 2 chitosan and graphene oxide

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

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

Embodiment 3

[0069] Embodiment 3 organic pollutant absorption test

[0070] combine Figure 5 , the test object is the sponge carbon membrane prepared in Example 1, the composite air filter membrane (hereinafter referred to as the composite membrane) based on chitosan and graphene oxide prepared in Example 1, using 3 cubic meters of organic volatile matter absorption test box, first add formaldehyde, toluene and sulfur dioxide and other organic volatiles into the test box, use the built-in fan to make them completely volatilize, then put the test sample filter membrane, turn on the built-in fan, perform internal air circulation and convection, and use the built-in TVOC detector to detect VOC content, record the film’s absorption of TVOC every 10 minutes, the test data is shown in the table below, and 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 t...

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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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Patent Type & Authority Patents(China)
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 江苏绿点环保科技有限公司
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