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Formaldehyde scavenging agent and preparation method thereof

A formaldehyde scavenger and solution technology, applied in the field of indoor air pollution control, can solve the problems of low formaldehyde removal rate, impact on health, poor long-term effect, etc., and achieve the effect of high formaldehyde removal rate, fast formaldehyde removal speed, and long effectiveness

Active Publication Date: 2022-04-05
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN108392939A discloses a kind of amino acid decoration and deodorant and its preparation method. Equal composition, suitable for the elimination of decoration odor, but has the disadvantages of low formaldehyde removal rate and poor long-term performance
CN112237835A discloses an amino acid formaldehyde scavenger and its application. It mainly consists of plant amino acid extracts, surfactants, food-grade protease and active ions. The shortcomings of being easily absorbed and affecting health

Method used

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  • Formaldehyde scavenging agent and preparation method thereof
  • Formaldehyde scavenging agent and preparation method thereof

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preparation example Construction

[0015] A preparation method of formaldehyde scavenger, comprising the following steps:

[0016] Disperse biomass carbon powder in alkaline solution, add organic polyamine and mix, the mass ratio of carbon powder to organic polyamine is 10:(0.5-1), react at 180-200°C for 3-6h, cool and centrifuge, The amino carbon quantum dot (N-CQDs) solution is obtained; the N-CQDs solution and the basic amino acid solution are mixed to obtain a formaldehyde scavenger solution.

[0017] In this embodiment, N-CQDs represent amino carbon quantum dots. The alkaline solution is a sodium hydroxide solution with a mass concentration of 2.5%. Under alkaline conditions, the reaction between biomass carbon powder and organic polyamines is more sufficient, so that more amino groups are generated on the surface of carbon quantum dots.

[0018] During cooling and centrifugation, it is to cool to room temperature, and centrifugation is to remove insoluble matter, improve the purity of amino carbon quant...

Embodiment 1

[0039] 1) Preparation of amino carbon quantum dots

[0040] First remove the dust on the surface of the rice husk with deionized water, after drying at 80°C, weigh 50g of rice husk and place it in the reactor, add 250mL of 10% hydrochloric acid, stir mechanically at 60°C for 2h, cool to room temperature, and use Wash with deionized water until neutral, add 250mL of 5% sodium hydroxide solution, stir mechanically at 90°C for 3h, cool to room temperature, wash with deionized water until neutral, and dry the solid at 80°C. The treated and dried rice husks were calcined in a muffle furnace at 300° C. for 3 hours, and cooled to obtain rice husk carbon powder.

[0041] Ultrasonic disperse 5g of rice husk carbon powder in 100mL of 2.5% sodium hydroxide solution, then add 0.25g of ethylenediamine, mix evenly, seal, react at 180°C for 6h, cool to room temperature, and centrifuge to remove insoluble matter to obtain amino carbon quantum Point the N-CQDs solution and dilute it 200 times...

Embodiment 2

[0049] 1) Preparation of amino carbon quantum dots

[0050] First remove the dust on the surface of the peanut shells with deionized water, after drying at 80°C, weigh 50g of peanut shells and put them in the reactor, add 250mL of 10% hydrochloric acid, stir mechanically at 70°C for 2h, cool to room temperature, Wash with deionized water until neutral, add 250mL of 5% sodium hydroxide solution, stir mechanically at 80°C for 3h, cool to room temperature, wash with deionized water until neutral, and dry the solid at 80°C. The dried peanut shells were calcined in a muffle furnace at 400°C for 2 hours, and then cooled to obtain peanut shell carbon powder.

[0051] Ultrasonic disperse 5g of peanut shell carbon powder in 100mL of 2.5% sodium hydroxide solution, then add 0.35g of diethylenetriamine, mix evenly, seal, react at 190°C for 4h, cool to room temperature, and centrifuge to remove insoluble matter to obtain amino carbon Quantum dot N-CQDs solution, diluted 200 times.

[00...

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Abstract

The invention provides a formaldehyde scavenger and a preparation method thereof, and relates to the technical field of indoor air pollution treatment. The invention relates to a preparation method of a formaldehyde scavenger, which comprises the following steps: dispersing biomass carbon powder in an alkaline solution, adding organic polyamine, mixing, reacting at 180-200 DEG C for 3-6 hours, cooling and centrifuging to obtain an amino carbon quantum dot (N-CQDs) solution; and mixing the N-CQDs solution and the alkaline amino acid solution to obtain a formaldehyde scavenger solution. The preparation method of the formaldehyde scavenger is simple and suitable for batch production, waste biomass raw materials are reasonably utilized, environmental pollution can be reduced, the biocompatibility of effective components is good, and the formaldehyde scavenger is more environmentally friendly. The formaldehyde scavenger disclosed by the invention is non-toxic, free of secondary pollution, high in formaldehyde removal rate and long-acting, and achieves the purpose of safely removing formaldehyde.

Description

technical field [0001] The invention relates to the technical field of indoor air pollution control, in particular to a formaldehyde scavenger and a preparation method thereof. Background technique [0002] Formaldehyde is a common pollutant in indoor air, mainly from indoor building decoration materials, plywood, floors, adhesives, paints, furniture, etc. Most of the wood-based panels contain urea-formaldehyde resin, phenolic resin, formaldehyde resin, etc. Formaldehyde is released during the process, and the release cycle lasts for several years. Indoor formaldehyde concentration is greater than 0.08mg / m 3 When exposed to it for a long time, it can cause red eyes, itchy eyes, throat discomfort, chest tightness, and asthma. Long-term exposure can cause nasopharyngeal cancer, brain cancer, neonatal chromosomal abnormalities, leukemia and other blood diseases. In June 2004, the World Health Organization (WHO) and the International Agency for Research on Cancer (IARC) raised...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/79
Inventor 李明田汪茜崔学军杨瑞嵩王莹毕友林
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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