CN114272736A - Formaldehyde scavenging agent and preparation method thereof - Google Patents
Formaldehyde scavenging agent and preparation method thereof Download PDFInfo
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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. A preparation method of a formaldehyde scavenger comprises the following steps: dispersing biomass carbon powder in an alkaline solution, adding organic polyamine for mixing, reacting at 180-200 ℃ for 3-6h, cooling and centrifuging to obtain an amino carbon quantum dot (N-CQDs) solution; mixing the N-CQDs solution with the basic amino acid solution to obtain the formaldehyde scavenger solution. The preparation method of the formaldehyde scavenger is simple, is suitable for batch production, reasonably utilizes waste biomass raw materials, can reduce environmental pollution, has good biocompatibility of active ingredients, and is more environment-friendly. The formaldehyde scavenger disclosed by the invention is non-toxic, free of secondary pollution, high in formaldehyde removal rate, long in acting and capable of achieving the purpose of safely removing formaldehyde.
Description
Technical Field
The invention relates to the technical field of indoor air pollution treatment, in particular to a formaldehyde scavenger and a preparation method thereof.
Background
Formaldehyde is a common pollutant in indoor air and mainly comes from interior building decorative materials, plywood,The artificial boards such as floors, adhesives, paints, furniture and the like mostly contain urea-formaldehyde resin, phenolic resin, formaldehyde resin and the like, and the substances can release formaldehyde in the using process, and the release period is as long as several years. The indoor formaldehyde concentration is more than 0.08mg/m3In addition, it can cause eye red, eye itching, throat discomfort, chest distress and asthma, and can cause blood diseases such as nasopharyngeal carcinoma, brain cancer, newborn chromosome abnormality, leukemia, etc. when contacting for a long time. In 6 months 2004, formaldehyde was elevated as a first class of human carcinogens after the World Health Organization (WHO) and the international agency for research on cancer (IARC) had fully evaluated the existing evidence of carcinogenesis for formaldehyde. Therefore, the national mandatory standard of China (GB/T1850) limits the formaldehyde release amount in indoor decoration materials, artificial boards and products thereof (GB/T1850) 2001) defines that the concentration of formaldehyde in the air is not higher than 0.08mg/m3. At present, the indoor formaldehyde purification method commonly comprises a physical adsorption method, a catalytic oxidation method, a water absorption method and the like. The adsorption method is the most common method for treating formaldehyde pollution. The porous materials such as active carbon, diatomite and the like can adsorb formaldehyde, are low in price, simple and easy to use, but have the defects of poor formaldehyde adsorption effect and secondary pollution caused by easy desorption. The catalytic oxidation method includes a photocatalytic method and a noble metal catalytic oxidation method. The photocatalysis method needs irradiation of light, especially ultraviolet light when in use, is limited in use, has more byproducts and can not completely convert formaldehyde into carbon dioxide and water. The noble metal catalyst can completely oxidize formaldehyde at room temperature, and has the disadvantages of long time and high cost.
The adsorption materials on the market at present comprise activated carbon, silica fume-based materials, composite nano materials and the like, and the adsorption materials lack formaldehyde specificity, namely can adsorb other micromolecules in the air while adsorbing formaldehyde, so that the adsorption sites of the formaldehyde are occupied, the adsorption efficiency is reduced, and the adsorbed formaldehyde can be desorbed again and returns to the air when the temperature is raised. In recent years, natural extracts and amino acids are used as materials for removing formaldehyde, and the basic principle of removing formaldehyde is that amino groups in amino acid compounds can perform addition condensation reaction with formaldehyde to generate stable compound-hydroxymethyl derivatives, so that the defect of secondary pollution caused by desorption when an adsorbent absorbs formaldehyde is overcome, and the formaldehyde-removing adsorbent belongs to a green material and has a certain development prospect. CN108392939A discloses an amino acid decoration deodorant and a preparation method thereof, wherein the amino acid decoration deodorant is composed of amino acid, 2-mercaptobenzimidazole, benzyl triethyl ammonium bromide, bromo-cinnamaldehyde, aloe essential oil, dithio-salicylic acid and the like, is suitable for eliminating decoration smell, but has the defects of low formaldehyde removal rate and poor long-acting property. CN112237835A discloses an amino acid formaldehyde scavenger and application thereof, mainly comprising plant amino acid extract, surfactant, food-grade protease and active ions, having the advantages of safety, aldehyde removal and harmlessness, but having the defect that spray liquid drops are easy to be absorbed in the air to affect health.
Disclosure of Invention
The invention aims to provide a preparation method of a formaldehyde scavenger, which is simple, suitable for batch production and reasonable utilization of waste biomass raw materials, can reduce environmental pollution, has good biocompatibility of effective components, and is more environment-friendly.
The invention also aims to provide the formaldehyde scavenger which is non-toxic, free of secondary pollution, high in formaldehyde removal rate, long in acting and capable of achieving the aim of safely removing formaldehyde.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The invention provides a preparation method of a formaldehyde scavenger, which comprises the following steps:
dispersing biomass carbon powder in an alkaline solution, adding organic polyamine for mixing, reacting at 180-200 ℃ for 3-6h, cooling and centrifuging to obtain an amino carbon quantum dot (N-CQDs) solution; mixing the N-CQDs solution with the basic amino acid solution to obtain the formaldehyde scavenger solution.
The invention also provides a formaldehyde scavenger prepared by the preparation method of the formaldehyde scavenger.
The embodiment of the invention at least has the following beneficial effects:
in the invention, in an alkaline solution, organic polyamine is easier to react with carbon powder to generate amino carbon quantum dots with alkalinity. Then the amino carbon quantum dots react with basic amino acid to generate the formaldehyde scavenger solution of the carbon quantum dots loaded with the amino acid. The principle of removing formaldehyde is as follows: the formaldehyde reacts with amino (amino carbon quantum dots, amino acid) to generate hydroxymethyl derivatives, water and other substances harmless to human bodies, so that the aim of safely removing the formaldehyde is fulfilled. The synergistic effect of the amino carbon quantum dots and the amino acid further improves the formaldehyde removal effect.
The formaldehyde scavenger has the characteristics of no toxicity, no secondary pollution, high formaldehyde removal speed, high formaldehyde removal rate, good formaldehyde removal durability and long effectiveness.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.
A preparation method of a formaldehyde scavenger comprises the following steps:
dispersing biomass carbon powder in an alkaline solution, adding organic polyamine, and mixing, wherein the mass ratio of the carbon powder to the organic polyamine is 10: (0.5-1), reacting for 3-6h at the temperature of 180-; mixing the N-CQDs solution with the basic amino acid solution to obtain the formaldehyde scavenger solution.
In this example, N-CQDs represent amino carbon quantum dots. The alkaline solution is a sodium hydroxide solution with a mass concentration of 2.5%. Under the alkaline condition, the reaction of the biomass carbon powder and the organic polyamine is more sufficient, so that more amino groups are generated on the surface of the carbon quantum dot.
And during cooling and centrifugation, the solution is cooled to room temperature, and the centrifugation is to remove insoluble substances, so that the purity of the amino carbon quantum dots in the N-CQDs solution is improved, the full reaction with amino acid is facilitated, and the carbon quantum dot-loaded amino acid formaldehyde scavenger solution with higher purity is obtained.
In an alkaline solution, organic polyamine is easier to react with biomass carbon powder to generate amino carbon quantum dots with alkalinity. The mass ratio of the carbon powder to the organic polyamine is 10: (0.5-1) and reacting at the temperature of 180 ℃ and 200 ℃ for 3-6 h. Thus, the reaction condition of the carbon powder and the organic polyamine is better. Then the amino carbon quantum dots react with basic amino acid to generate the formaldehyde scavenger solution of the carbon quantum dots loaded with the amino acid. The synergistic effect of the amino carbon quantum dots and the amino acid further improves the formaldehyde removal effect.
The principle of removing formaldehyde is as follows: formaldehyde reacts with amino (amino carbon quantum dots, amino acid) to generate hydroxymethyl derivatives, water and other substances harmless to human bodies, so that the aim of safely removing formaldehyde is fulfilled. The addition of the ethanol, the surfactant, the humectant and the auxiliary agent can enhance the reactivity of the amino group, so that the amino group reacts with formaldehyde more quickly and thoroughly, the formaldehyde removal speed is high, and the formaldehyde removal rate is high.
The organic polyamine is one of ethylenediamine, diethylenetriamine and triethylenetetramine. The basic amino acid is one or more of arginine, lysine and histidine.
The preparation method of the biomass carbon powder comprises the following steps: washing a biomass carbon source with deionized water, drying at 70-80 ℃, treating the dried biomass carbon source in an acid solution for 2-3h, then treating in an alkali solution for 2-3h at 60-90 ℃, cooling after treatment, washing to neutrality with deionized water, drying, carbonizing at 300-500 ℃ for 1-3h, and cooling.
The biomass carbon source is one or more of rice hull, peanut shell, tea stalk and bamboo leaf. The biomass carbon sources such as rice hulls, peanut shells, tea stems, bamboo leaves and the like are adopted, so that the biomass carbon sources are rich in sources, low in price and high in carbon content, and the waste utilization is beneficial to environmental protection and reduction of environmental pollution. The acid-base solution is sequentially adopted for treatment, so that metal oxides and silicon dioxide in the biomass carbon source can be removed, carbon powder with high purity is obtained, and high-quality carbon quantum dots can be generated. And the carbon powder is processed under the conditions, so that the purity of the carbon powder is optimal, and the mass of the carbon quantum dots is highest.
Specifically, the acid solution is a hydrochloric acid solution having a mass concentration of 10%, and the alkali solution is a sodium hydroxide solution having a mass concentration of 5%. Therefore, the problem that the acid-base degree is not enough, so that metal oxides and silicon dioxide in the biomass carbon source are not thoroughly removed, the purity of the obtained carbon powder is not high, and the quality of the carbon quantum dots is influenced can be avoided.
In the embodiment, the method also comprises the steps of adding ethanol, a surfactant, a humectant and an auxiliary agent into the formaldehyde scavenger solution, stirring and mixing to prepare the spray. The auxiliary agent comprises antioxidant and flavoring agent, wherein the antioxidant is vitamin C, and the flavoring agent is Aloe essential oil. After ethanol, a surfactant, a humectant and an auxiliary agent are added, the amino carbon quantum dots and the basic amino acid react more fully, so that the obtained carbon quantum dot-loaded amino acid formaldehyde scavenger solution has a better formaldehyde removal effect. Namely, the solution is put into a spraying device to prepare the carbon quantum dot-loaded amino acid formaldehyde scavenger spraying agent. The spray has the characteristics of simple components, good solubility of active substances and good long-term stability of the solution, and the aldehyde-removing active ingredients have rich amino groups, high activity, high aldehyde-removing speed and high removal rate.
In detail, the ratio of the N-CQDs solution, ethanol, basic amino acid, surfactant, humectant, antioxidant, and flavoring agent in this example is: 1mL of: (0.5-1) mL: (0.5-1.5) mg: (0.05-0.1) mg: (0.01-0.05) mg: (0.01-0.02) mg: (0.01-0.03) mg.
The surfactant is one of alkyl glycoside APG0810 and APG 0814. The humectant is one or more of sorbitol, ethylene glycol, glycerol, and quaternary isoamyl tetrol.
The ethanol is absolute ethanol. By adding the absolute ethyl alcohol, the surfactant, the humectant and the antioxidant, the formaldehyde scavenger solution has better dispersibility, and when the formaldehyde scavenger solution is prepared into a spray, the sprayed mist is finer and has better volatility, so that the formaldehyde scavenger spray has better effect. The flavoring agent is added, so that the odor of the amino acid can be reduced, and the comfort of the formaldehyde scavenger spray in use can be improved.
The method for preparing the sheet material comprises the following steps: adding 90-110mg/L penetrant into formaldehyde scavenger spray, soaking in polyurethane base material for 20-40min, and baking at 40-60 deg.C for 0.5-1 h.
The polyurethane substrate has the advantages of large porosity, high active ingredient loading rate and more active points in unit area, so that the formaldehyde scavenger has high formaldehyde removal speed, and the polyurethane substrate has stable property, and can ensure good formaldehyde removal durability and long effectiveness of the formaldehyde scavenger.
Alternatively, the polyurethane substrate has a pore size of 40-80 μm and a size of 420mm by 210mm by 4 mm. And the volume ratio of the formaldehyde scavenger solution to the polyurethane substrate is not less than 10. Therefore, the sheet material with the carbon quantum dots loaded with the amino acid formaldehyde scavenger has better formaldehyde removal effect and longer timeliness.
In this embodiment, the concentration of the osmotic agent is preferably 100 mg/L. The penetrant is one or more of sodium sulfamate, sodium alkyl sulfosuccinate, sodium alkyl sulfonate, and sodium alkyl benzene sulfonate. The addition of the penetrant allows the formaldehyde scavenger solution to better penetrate the polyurethane substrate, allowing the polyurethane substrate to absorb more formaldehyde scavenger. When the formaldehyde scavenger sheet is used, the amino on the surface of the sheet preferentially reacts with formaldehyde, then the amino inside the sheet reacts with formaldehyde, and therefore the timeliness of the formaldehyde scavenger sheet is prolonged, and the formaldehyde scavenger sheet is more durable in effect and longer in effectiveness.
The formaldehyde scavenger of the embodiment has the characteristics of no toxicity, no secondary pollution, high formaldehyde removal speed, high formaldehyde removal rate, good formaldehyde removal durability and long effectiveness.
The room temperature in this example was 23. + -. 2 ℃.
In the embodiment, biomass carbon sources such as rice hulls, peanut shells, tea stalks, bamboo leaves and the like are adopted, so that the source is rich, the price is low, the carbon content is high, the waste utilization is favorable for environmental protection, and the environmental pollution is reduced; under the alkaline condition, formaldehyde reacts with amino to generate hydroxymethyl derivatives, water and other substances harmless to human bodies, the biocompatibility is good, no toxicity is caused, no secondary pollution is caused, and the aim of safely removing formaldehyde is fulfilled; the spraying agent and the sheet material are used together, and the spraying agent has the characteristics of high aldehyde removal speed, high removal rate, good durability and long effectiveness.
The formaldehyde scavenger solution prepared by the invention has two forms of formaldehyde scavenger spray and formaldehyde scavenger sheet, and can be used independently or in combination. When the spray is used in combination with the sheet, the formaldehyde removing speed is high, the formaldehyde removing durability is good, and the effectiveness is long.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
1) Preparation of amino carbon quantum dots
Firstly, removing dust on the surface of rice hulls by deionized water, drying at 80 ℃, weighing 50g of rice hulls, placing the rice hulls into a reactor, adding 250mL of 10% hydrochloric acid, mechanically stirring for 2h at 60 ℃, cooling to room temperature, cleaning to be neutral by deionized water, adding 250mL of 5% sodium hydroxide solution, mechanically stirring for 3h at 90 ℃, cooling to room temperature, cleaning to be neutral by deionized water, and drying the solid at 80 ℃. And calcining the treated and dried rice hulls in a muffle furnace at 300 ℃ for 3h, and cooling to obtain rice hull carbon powder.
Ultrasonically dispersing 5g of rice hull carbon powder in 100mL of 2.5% sodium hydroxide solution, then adding 0.25g of ethylenediamine, uniformly mixing, sealing, reacting at 180 ℃ for 6h, cooling to room temperature, centrifuging to remove insoluble substances to obtain amino carbon quantum dot N-CQDs solution, and diluting by 200 times.
2) Preparation of formaldehyde scavenger
And mixing 500mL of the diluted N-CQDs solution with 750mg of arginine to obtain the carbon quantum dot-loaded arginine formaldehyde scavenger solution.
3) Preparation of formaldehyde scavenger spray
500mL of carbon quantum dot-loaded arginine formaldehyde scavenger solution is taken and stirred at room temperature, 350mL of absolute ethyl alcohol, 25mg of alkyl glycoside APG0814, 5mg of sorbitol, 5mg of vitamin C and 5mg of aloe essential oil are sequentially added, and a certain volume of solution is taken and put into a spraying device to prepare the carbon quantum dot-loaded arginine formaldehyde scavenger spraying agent.
4) Preparation of Formaldehyde scavenger sheet
Adding 500mg of sodium sulfamate into 5000mL of carbon quantum dot-loaded arginine formaldehyde scavenger spray, soaking a polyurethane substrate in the sodium sulfamate, taking out the polyurethane substrate after 20min, drying the polyurethane substrate in a ventilation drying box after spin-drying, and drying the polyurethane substrate at the temperature of 40 ℃ for 1h to obtain the carbon quantum dot-loaded arginine formaldehyde scavenger sheet.
Example 2
1) Preparation of amino carbon quantum dots
Firstly, removing dust on the surface of a peanut shell by deionized water, drying at 80 ℃, weighing 50g of peanut shell, placing the peanut shell into a reactor, adding 250mL of 10% hydrochloric acid, mechanically stirring at 70 ℃ for 2h, cooling to room temperature, washing to be neutral by deionized water, adding 250mL of 5% sodium hydroxide solution, mechanically stirring at 80 ℃ for 3h, cooling to room temperature, washing to be neutral by deionized water, and drying the solid at 80 ℃. And calcining the treated and dried peanut shells in a muffle furnace at 400 ℃ for 2h, and cooling to obtain the peanut shell carbon powder.
Ultrasonically dispersing 5g of peanut shell carbon powder in 100mL of 2.5% sodium hydroxide solution, then adding 0.35g of diethylenetriamine, uniformly mixing, sealing, reacting at 190 ℃ for 4h, cooling to room temperature, centrifuging to remove insoluble substances to obtain an amino carbon quantum dot N-CQDs solution, and diluting by 200 times.
2) Preparation of formaldehyde scavenger
And mixing 500mL of the diluted N-CQDs solution with 500mg of lysine to obtain the carbon quantum dot loaded lysine formaldehyde scavenger solution.
3) Preparation of formaldehyde scavenger spray
500mL of carbon quantum dot-loaded lysine formaldehyde scavenger solution is taken and stirred at room temperature, 500mL of absolute ethyl alcohol, 25mg of alkyl glycoside APG0810, 10mg of ethylene glycol, 10mg of vitamin C and 10mg of aloe essential oil are sequentially added, and a certain volume of solution is taken and put into a spraying device to prepare the carbon quantum dot-loaded lysine formaldehyde scavenger spraying agent.
4) Preparation of Formaldehyde scavenger sheet
Adding 500mg of sodium dodecyl sulfate into 5000mL of carbon quantum dot-loaded lysine formaldehyde scavenger spray, soaking a polyurethane substrate in the sodium dodecyl sulfate, taking out the polyurethane substrate after 20min, drying the polyurethane substrate in a ventilation drying box at 50 ℃ for 0.5h, and thus obtaining the carbon quantum dot-loaded lysine formaldehyde scavenger sheet.
Example 3
1) Preparation of amino carbon quantum dots
Firstly, removing dust on the surface of tea stems by deionized water, drying at 80 ℃, weighing 50g of tea stems, placing the tea stems into a reactor, adding 250mL of 10% hydrochloric acid, mechanically stirring for 2h at 80 ℃, cooling to room temperature, cleaning to be neutral by deionized water, adding 250mL of 5% sodium hydroxide solution, mechanically stirring for 3h at 70 ℃, cooling to room temperature, cleaning to be neutral by deionized water, and drying the solid at 80 ℃. And calcining the treated and dried tea stems in a muffle furnace at 400 ℃ for 2h, and cooling to obtain tea stem carbon powder.
Ultrasonically dispersing 5g of tea stem carbon powder in 100mL of 2.5% sodium hydroxide solution, then adding 0.50g of triethylene tetramine, uniformly mixing, sealing, reacting at 200 ℃ for 3h, cooling to room temperature, centrifuging to remove insoluble substances to obtain an amino carbon quantum dot N-CQDs solution, and diluting by 200 times.
2) Preparation of formaldehyde scavenger
And mixing 500mL of the diluted N-CQDs solution with 300mg of histidine to obtain a carbon quantum dot-loaded histidine formaldehyde scavenger solution.
3) Preparation of formaldehyde scavenger spray
500mL of carbon quantum dot-loaded histidine formaldehyde scavenger solution is taken and stirred at room temperature, 250mL of absolute ethyl alcohol, 50mg of alkyl glycoside APG0810, 15mg of glycerol, 15mg of vitamin C and 15mg of aloe essential oil are sequentially added, and a certain volume of solution is taken and put into a spraying device to prepare the carbon quantum dot-loaded histidine formaldehyde scavenger spraying agent.
4) Preparation of Formaldehyde scavenger sheet
Adding 500mg of dioctyl sodium sulfosuccinate into 5000mL of carbon quantum dot-loaded histidine formaldehyde scavenger spray, soaking a polyurethane substrate in the mixture, taking out the polyurethane substrate after 20min, spin-drying the polyurethane substrate, and drying the polyurethane substrate in a ventilation drying oven at the temperature of 60 ℃ for 0.5h to obtain the carbon quantum dot-loaded histidine formaldehyde scavenger sheet.
Example 4
1) Preparation of amino carbon quantum dots
Firstly, removing dust on the surface of bamboo leaves by deionized water, drying at 80 ℃, weighing 50g of bamboo leaves, placing the bamboo leaves into a reactor, adding 250mL of 10% hydrochloric acid, mechanically stirring for 2h at 90 ℃, cooling to room temperature, washing to be neutral by deionized water, adding 250mL of 5% sodium hydroxide solution, mechanically stirring for 3h at 60 ℃, cooling to room temperature, washing to be neutral by deionized water, and drying the solid at 80 ℃. And calcining the treated and dried bamboo leaves in a muffle furnace at 400 ℃ for 2h, and cooling to obtain bamboo leaf carbon powder.
Ultrasonically dispersing 5g of bamboo leaf carbon powder in 100mL of 2.5% sodium hydroxide solution, then adding 0.50g of ethylenediamine, uniformly mixing, sealing, reacting at 200 ℃ for 3h, cooling to room temperature, centrifuging to remove insoluble substances to obtain amino carbon quantum dot N-CQDs solution, and diluting by 200 times.
2) Preparation of formaldehyde scavenger
And mixing 500mL of the diluted N-CQDs solution with 100mg of arginine, 100mg of lysine and 100mg of histidine to obtain the carbon quantum dot loaded amino acid formaldehyde scavenger solution.
3) Preparation of formaldehyde scavenger spray
500mL of carbon quantum dot loaded amino acid formaldehyde scavenger solution is stirred at room temperature, 250mL of absolute ethyl alcohol, 30mg of alkyl glycoside APG0814, 10mg of pentaerythritol, 10mg of vitamin C and 15mg of aloe essential oil are sequentially added, and a certain volume of solution is put into a spraying device to prepare the carbon quantum dot loaded amino acid formaldehyde scavenger spraying agent.
4) Preparation of Formaldehyde scavenger sheet
Adding 500mg of sodium dodecyl benzene sulfonate into 5000mL of carbon quantum dot-loaded amino acid formaldehyde scavenger spray, soaking a polyurethane substrate in the sodium dodecyl benzene sulfonate, taking out the polyurethane substrate after 20min, drying the polyurethane substrate in a ventilation drying box after spin-drying, and drying the polyurethane substrate at the temperature of 60 ℃ for 1h to obtain the carbon quantum dot-loaded amino acid formaldehyde scavenger sheet.
Example 5
In this embodiment, common carbon powder is selected as the raw material.
1) Preparation of amino carbon quantum dots
Ultrasonically dispersing 5g of common carbon powder in 100mL of 2.5% sodium hydroxide solution, then adding 0.50g of ethylenediamine, uniformly mixing, sealing, reacting at 200 ℃ for 3h, cooling to room temperature, centrifuging to remove insoluble substances to obtain amino carbon quantum dot N-CQDs solution, and diluting by 200 times.
2) Preparation of formaldehyde scavenger
And mixing 500mL of the diluted N-CQDs solution with 100mg of arginine, 100mg of lysine and 100mg of histidine to obtain the carbon quantum dot loaded amino acid formaldehyde scavenger solution.
3) Preparation of formaldehyde scavenger spray
500mL of carbon quantum dot loaded amino acid formaldehyde scavenger solution is stirred at room temperature, 250mL of absolute ethyl alcohol, 30mg of alkyl glycoside APG0814, 10mg of pentaerythritol, 10mg of vitamin C and 15mg of aloe essential oil are sequentially added, and a certain volume of solution is put into a spraying device to prepare the carbon quantum dot loaded amino acid formaldehyde scavenger spraying agent.
4) Preparation of Formaldehyde scavenger sheet
Adding 500mg of sodium dodecyl benzene sulfonate into 5000mL of carbon quantum dot-loaded amino acid formaldehyde scavenger spray, soaking a polyurethane substrate in the sodium dodecyl benzene sulfonate, taking out the polyurethane substrate after 20min, drying the polyurethane substrate in a ventilation drying box after spin-drying, and drying the polyurethane substrate at the temperature of 60 ℃ for 1h to obtain the carbon quantum dot-loaded amino acid formaldehyde scavenger sheet.
Results of the experiment
The following experiments illustrate the formaldehyde removing effect of the carbon quantum dot-loaded amino acid formaldehyde scavenger prepared by the invention.
Uniformly spraying 100mL of carbon quantum dot-loaded amino acid formaldehyde scavenger spray onto 3m2Immediately put on a base paper with a thickness of 1.5m3In the test chamber, a 30W fluorescent lamp was turned on for testing, the formaldehyde concentration was measured 24 hours later, and the formaldehyde removal rate was calculated, with the results shown in Table 1.
1 carbon quantum dot-loaded amino acid formaldehyde scavenger sheet is placed at 1.5m3In the test chamber, a 30W fluorescent lamp is started for testingIn the experiment, the formaldehyde concentration was measured after 720 hours, and the formaldehyde removal rate was calculated, and the results are shown in table 1.
TABLE 1 Formaldehyde removal results
According to the table 1, the carbon quantum dot-loaded amino acid formaldehyde scavenger spray and the carbon quantum dot-loaded amino acid formaldehyde scavenger sheet prepared by the invention have good formaldehyde removal effects. And the formaldehyde removal rate of the spraying agent in 24 hours reaches 89-91%, and the formaldehyde removal rate of the sheet in 720 hours reaches 78-84%. Therefore, the formaldehyde removal efficiency of the spray and the sheet is high, and the formaldehyde removal timeliness of the sheet is longer.
In summary, in the preparation method of the formaldehyde scavenger of the embodiment of the invention, in the alkaline solution, the organic polyamine is more likely to react with the carbon powder to generate the amino carbon quantum dots with alkalinity. Then the alkaline amino carbon quantum dots react with the alkaline amino acid to generate the formaldehyde scavenger solution of the carbon quantum dots loaded with the amino acid. The preparation method is simple, is suitable for batch production, fully utilizes natural substances and amino acid, can reduce environmental pollution, and is safer and more environment-friendly.
The formaldehyde scavenger provided by the embodiment of the invention has the characteristics of no toxicity, no secondary pollution, high formaldehyde removal speed, high formaldehyde removal rate, good formaldehyde removal durability and long effectiveness.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. The preparation method of the formaldehyde scavenger is characterized by comprising the following steps:
dispersing biomass carbon powder in an alkaline solution, adding organic polyamine for mixing, reacting at 180-200 ℃ for 3-6h, cooling and centrifuging to obtain an amino carbon quantum dot (N-CQDs) solution; and mixing the N-CQDs solution with a basic amino acid solution to obtain a formaldehyde scavenger solution.
2. The preparation method according to claim 1, wherein the mass ratio of the biomass carbon powder to the organic polyamine is 10: (0.5-1).
3. The method according to claim 1, wherein the organic polyamine is one of ethylenediamine, diethylenetriamine, and triethylenetetramine, and the basic amino acid is one or more of arginine, lysine, and histidine.
4. The preparation method of claim 1, wherein the preparation method of the biomass carbon powder comprises: washing a biomass carbon source by using deionized water, drying at 70-80 ℃, treating the dried biomass carbon source in an acid solution for 2-3h, then treating in an alkali solution for 2-3h at 60-90 ℃, cooling after treatment, then washing to be neutral by using the deionized water, drying, carbonizing at 300-500 ℃ for 1-3h, and cooling.
5. The method according to claim 1, further comprising adding ethanol, a surfactant, a humectant and an auxiliary agent to the formaldehyde scavenger solution, stirring and mixing to prepare a spray.
6. The method of claim 5, wherein the auxiliary agent comprises an antioxidant and a flavoring agent, the antioxidant is vitamin C, and the flavoring agent is aloe essential oil.
7. The method of claim 6, wherein the ratio of the N-CQDs solution, ethanol, basic amino acid, surfactant, humectant, antioxidant, and flavoring agent is 1 mL: (0.5-1) mL: (0.5-1.5) mg: (0.05-0.1) mg: (0.01-0.05) mg: (0.01-0.02) mg: (0.01-0.03) mg.
8. The method of manufacturing according to claim 5, further comprising forming a sheet, the method of manufacturing the sheet comprising: adding penetrant into the spray, adding polyurethane base material, soaking for 20-40min, and oven drying at 40-60 deg.C for 0.5-1 h.
9. The preparation method according to claim 8, wherein the concentration of the osmotic agent is 90-110mg/L, and the osmotic agent is one or more of sodium sulfamate, sodium alkyl sulfosuccinate, sodium alkyl sulfonate and sodium alkyl benzene sulfonate.
10. A formaldehyde scavenger prepared by the method for producing a formaldehyde scavenger according to any one of claims 1 to 9.
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| CN115974158A (en) * | 2023-01-06 | 2023-04-18 | 四川轻化工大学 | Hydrothermal method for synthesizing molybdenum disulfide by taking elemental sulfur as sulfur source |
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