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Color-changing adsorption material capable of repeatedly and continuously adsorbing formaldehyde and preparation method thereof

An adsorption material and a technology for adsorbing formaldehyde, which are applied in the field of color-changing adsorption materials and their preparation, can solve the problem that the carrier of the adsorption material cannot be reused in the case of formaldehyde removal, and achieve the effect of rapid and efficient removal, large specific surface area, and obvious color change

Pending Publication Date: 2020-10-02
上海弘知生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical insufficiency of the existing technology that cannot intuitively reflect the removal of formaldehyde and the shortcomings of the adsorption material carrier that cannot be reused, the present invention provides a green and environmentally friendly color-changing adsorption material that can repeatedly and continuously absorb formaldehyde and its Preparation

Method used

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  • Color-changing adsorption material capable of repeatedly and continuously adsorbing formaldehyde and preparation method thereof
  • Color-changing adsorption material capable of repeatedly and continuously adsorbing formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 20 g of HOCH2C(NH2)(CH3)CH2OH in 100 ml of deionized water and stir evenly to make a formaldehyde reactant. The resulting solution is (a); add 3 mL of a single developer to solution (a) Xinghong, stir evenly to obtain solution (b); add 10g of magnesium chloride to solution (b), stir evenly to obtain solution (c), soak the spare white water-absorbing sponge in solution (c) in advance, and then vacuum Dry at 40°C in a drying oven to make a color-changing formaldehyde-removing sponge carrier.

[0038]After the reaction is complete, the color of the sponge changes from yellow to red; when the color turns red, it is perceived that the formaldehyde reactant has absorbed formaldehyde and undergoes a chemical reaction; spray the formaldehyde reactant again, and the color of the sponge carrier changes to the color of the unreacted sponge—yellow .

Embodiment 2

[0040] Dissolve 15 g of HOCH2CH(OH)CH2NH2 in 100 ml of deionized water and stir evenly to make a formaldehyde reactant. The resulting solution is (a); add 2 mL of mixed developer thymolphthalein to the solution (a)— Alizarin yellow, stir evenly to obtain solution (b); add 15g of magnesium chloride to solution (b), stir evenly to obtain solution (c), soak the spare white water-absorbing sponge in solution (c) in advance, and then Dry it in a vacuum oven at 40°C to make a color-changing formaldehyde-removing sponge carrier.

[0041] After the reaction is complete, the color of the sponge changes from purple to yellow; the formaldehyde reactant is sprayed again, and the color of the sponge carrier changes to the color of the unreacted sponge—purple.

Embodiment 3

[0043] 10 g HOCH 2 CH(NH 2 )CH 2 Dissolve OH in 100 ml of deionized water and stir evenly to make a formaldehyde reactant. The obtained solution is (a); add 5 mL of a single color developer neutral red to the solution (a), stir evenly to obtain the solution (b) Add 10g of magnesium chloride to the solution (b), stir evenly to obtain the solution (c), soak the spare white water-absorbing sponge in the solution (c) in advance, and then dry it in a vacuum oven at 40°C to prepare Into a color-changing formaldehyde removal sponge carrier.

[0044] After the reaction is complete, the color of the sponge changes from yellow to red; the formaldehyde reactant is sprayed again, and the color of the sponge carrier changes to the color of the unreacted sponge—yellow.

[0045] testing sample Formaldehyde removal rate after 24h Color changes Example 1 96.3 yellow → red Example 2 93.5 purple → yellow Example 3 92.4 yellow → red

[0046] The color...

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Abstract

The invention discloses a green, environment-friendly and biodegradable formaldehyde-removing color-changing sponge carrier. The invention discloses a color-changing adsorbing material capable of repeatedly and continuously adsorbing formaldehyde. The material is characterized by being prepared by the steps: firstly, adding an alcohol amine compound into deionized water, and stirring thoroughly todissolve to prepare a formaldehyde reactant evenly, wherein the deionized water and the adsorbing material are proportioned according to the mass ratio of (1:1)-(3:1); and then physically adsorbing the formaldehyde reactant, a color developing agent and a humectant of the corresponding components by the adsorbing material, to prepare the color-changing adsorbing material capable of repeatedly andcontinuously adsorbing formaldehyde, wherein the adsorbing material is biodegradable water-absorbing sponge prepared by taking wood pulp as a raw material, and the surface of the adsorbing material is loose and porous, so that lasting adsorption of formaldehyde gas is facilitated. The formaldehyde reactant adsorbed on the sponge removes formaldehyde through a chemical reaction, and reaches a color changing area of the color developing agent by reducing the pH value of the system; after the reaction is completed, the formaldehyde reactant is sprayed again, and the previous color is displayed,so that the purpose of repeated and continuous use is achieved.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde removal, in particular to a formaldehyde-removing adsorption material that can be repeatedly and continuously used in air treatment, and in particular to a color-changing adsorption material that can repeatedly and continuously absorb formaldehyde and display formaldehyde removal through color changes and a preparation method thereof . Background technique [0002] As we all know, people spend an average of 70% to 90% of their time indoors every day, and urban residents even spend 90% of their time indoors every day. According to the air quality sampling results of newly installed residential buildings in first-tier cities, the average rate of formaldehyde exceeding the standard is 70% to 80%. Among the children with leukemia in my country, more than 90% of the family houses of the children were renovated and used in the past six months. For this reason, the World Health Organization has cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01D53/81B01D53/72
CPCB01J20/24B01D53/81B01D53/72B01J2220/4825B01D2257/708B01D2253/20
Inventor 毕伟华袁海周晓彤
Owner 上海弘知生物科技有限公司
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