CN113144866A - Environment-friendly formaldehyde scavenger and preparation method thereof - Google Patents
Environment-friendly formaldehyde scavenger and preparation method thereof Download PDFInfo
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- CN113144866A CN113144866A CN202110454121.3A CN202110454121A CN113144866A CN 113144866 A CN113144866 A CN 113144866A CN 202110454121 A CN202110454121 A CN 202110454121A CN 113144866 A CN113144866 A CN 113144866A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention provides an environment-friendly formaldehyde scavenger, which comprises, by mass, 3-5% of persimmon tannin, 0.5-1% of glycerol, 2-3% of cysteine hydrochloride, 0.5-1% of water-soluble chitosan, 0.05% of kason, 0.05% of fatty alcohol-polyoxyethylene ether and 89-94% of deionized water. The formaldehyde scavenger is preferably prepared into a spray, is sprayed by a small handheld sprayer, captures and clears aldehyde substances by physical adsorption and chemical combination, and has the characteristics of large removal range, high removal efficiency, convenience in use and high safety.
Description
Technical Field
The invention belongs to the technical field of air purifiers, relates to a formaldehyde scavenger, and particularly relates to an environment-friendly formaldehyde scavenger and a preparation method thereof.
Background
Formaldehyde is a colorless gas with strong pungent smell, is also an important chemical raw material and an organic solvent, can participate in the reaction of human proteins to generate a nitrogen methylene compound so as to denature the human proteins and cause chronic poisoning, tissue lesion, anaphylactic reaction and nervous system injury, and is determined as a carcinogenic and malformation-causing substance by the world health organization. Along with the production and use of novel indoor decoration materials, furniture and the like, formaldehyde becomes one of serious pollutants, the release period is long, and the danger is large, so that a formaldehyde treatment method becomes one of hot spots researched in recent years.
The current common formaldehyde pollution control methods include ventilation, plant decomposition, adsorption purification, membrane absorption, oxidation purification, photocatalytic purification and the like, wherein the physical and chemical adsorption purification method is widely used for indoor formaldehyde treatment due to high efficiency and convenient use. There are, however, a number of disadvantages, such as: the activated carbon, bamboo charcoal and the like are adopted for physical adsorption, and need to be replaced frequently, so that secondary pollution is easily caused; chemical adsorption is adopted, and although the formaldehyde treatment effect is good, the toxicity of the compound added into the scavenging agent is high, and the scavenging agent is not environment-friendly. The use effect of part of the current commercial products is limited by the application environment, and most of the formaldehyde scavengers contain titanium dioxide. Because titanium dioxide is an ultraviolet light catalyst, the removal effect of formaldehyde is extremely limited under natural light or no light, and the application is limited.
Persimmon tannin belongs to condensed tannin, and is a tannin substance extracted from persimmon, and the content of the tannin substance in persimmon peel is the largest. Because tannin is rich in ortho-phenolic hydroxyl, reactive ortho-phenolic hydroxyl is easy to generate polymerization reaction with formaldehyde to generate condensate, and thus, a plurality of scholars research and apply the tannin to formaldehyde scavengers. For example, the best adsorption rate of persimmon tannin to formaldehyde was found to be 48.2% in the study of its adsorption effect on formaldehyde by Cao Zhen (see: Cao]North river agriculture university, 2017); patent CN110327770A discloses a formaldehyde-removing composition, which mainly comprises lignin, persimmon tannin and tea polyphenol in a mass ratio of 5-7:14-18:2-6, 90% of formaldehyde can be removed within 48 hours, and the cost is low(ii) a Patent CN105727907A discloses a magnetic persimmon tannin composite adsorbing material, which takes persimmon tannin as a main adsorption functional component and nano Fe3O4The particles are magnetic functional components, chitosan, graphene and the like are used as load sets of the adsorption components and the magnetic components, and the material has the characteristics of strong stability, strong environment resistance, high yield, low cost, extremely high adsorption capacity, easiness in separation and recovery, no secondary pollution and the like. The above patents all adopt a chemical adsorption method to remove formaldehyde, but have the disadvantages of low removal efficiency, small removal range and easy secondary pollution.
Disclosure of Invention
The invention aims to improve the defects of the formaldehyde scavenger in the existing market and develop the high-efficiency and environment-friendly formaldehyde scavenger.
Based on the purpose, the invention provides an environment-friendly formaldehyde scavenger, and the effective components of the environment-friendly formaldehyde scavenger comprise persimmon tannin, cysteine hydrochloride and water-soluble chitosan.
The persimmon tannin is used as a main component of the formaldehyde scavenger, contains a large amount of phenolic hydroxyl groups, and has strong reaction activity. Because of the existence of the phloroglucinol type structure, the phloroglucinol type structure reacts with formaldehyde at the C-6 or C-8 position, and adsorbed formaldehyde molecules are difficult to be released again, thereby realizing good formaldehyde removing effect. Cysteine hydrochloride is an important substance which has physiological functions and widely exists in the nature, is an amino acid which is used for preventing harmful substances and increasing the activity of tissue cells in the bodies of animals and plants, is one of more than 20 amino acids which form protein, is the only amino acid with active sulfydryl (-SH), and can react and combine with formaldehyde to achieve the effect of removing the formaldehyde. The water soluble chitosan is a high molecular polymer, the chemical structure of which is a polymer of hexose, and the water soluble chitosan can form a chain colloid in an aqueous solution, the molecular weight can reach more than 100 ten thousand, and the molecular size is 30 to 100 ten thousand times of odor molecules such as formaldehyde, ammonia, hydrogen sulfide and the like. The water-soluble chitosan can physically adsorb odor molecules through huge intermolecular attraction, and the adsorbed odor molecules such as formaldehyde, acetaldehyde and the like are removed by the rapid chemical reaction of the active phenolic group or the amino group of cysteine hydrochloride in the persimmon tannin, so that the formaldehyde removal efficiency can be effectively improved.
Further, the environment-friendly formaldehyde scavenger provided by the invention comprises, by mass, 3-5% of persimmon tannin, 2-3% of cysteine hydrochloride and 0.5-1% of water-soluble chitosan.
The prior formaldehyde removing composition is mostly solid powder, and formaldehyde is removed by physical or chemical adsorption, so that most components in the composition cannot be diffused into air to prevent harm to human bodies, but the prior formaldehyde removing composition has the disadvantages of small removing range and low removing efficiency. The environment-friendly formaldehyde scavenger disclosed by the invention is preferably prepared into a spray agent, is sprayed by a small handheld sprayer, and has the characteristics of large removal range and high removal efficiency.
The environment-friendly formaldehyde scavenger also needs to be prepared by adding an auxiliary agent or a carrier for assisting effective components to exert effects, wherein the auxiliary agent or the carrier comprises glycerol, carbazone, fatty alcohol-polyoxyethylene ether and deionized water. According to the actual application requirement, other components for enhancing the fragrance or sterilizing and killing insects can be added by the ordinary skilled person in the art, and the invention is not limited.
Furthermore, the auxiliary agent or carrier of the environment-friendly formaldehyde scavenger provided by the invention comprises, by mass, 0.5-1% of glycerol, 0.05% of cason, 0.05% of fatty alcohol-polyoxyethylene ether and 89-94% of deionized water.
The invention also provides a preparation method of the environment-friendly formaldehyde scavenger, which comprises the following steps:
(1) dissolving water-soluble chitosan in deionized water to obtain a solution A;
(2) dissolving cysteine hydrochloride in the solution A to obtain a solution B;
(3) and sequentially adding the persimmon tannin, the glycerol, the kaempferol and the fatty alcohol-polyoxyethylene ether into the solution B, and uniformly stirring to obtain the environment-friendly formaldehyde scavenger.
The invention relates to an application of an environment-friendly formaldehyde scavenger in air purification.
Compared with the prior art, the invention has the following beneficial effects or advantages:
(I) capturing and decomposing aldehyde substances
The effective components of the environment-friendly formaldehyde scavenger provided by the invention comprise persimmon tannin, cysteine hydrochloride and water-soluble chitosan, wherein the persimmon tannin is rich in leading phenolic hydroxyl and can generate a polymerization reaction with formaldehyde to generate a condensate; the amino group contained in the cysteine hydrochloride can also react with aldehydes, thereby achieving the purpose of eliminating formaldehyde. The inventor tests and verifies that the reaction efficiency of the persimmon tannin and formaldehyde can be effectively improved by adding the water-soluble chitosan, and the formaldehyde removal rate is improved.
(II) complete decomposition of chemical bond
The persimmon tannin is used as a main component of the formaldehyde scavenger, contains a large amount of phenolic hydroxyl groups, and has strong reaction activity. Because of the existence of the phloroglucinol type structure, the phloroglucinol type structure reacts with formaldehyde at the C-6 or C-8 position, and adsorbed formaldehyde molecules are difficult to be released again, thereby realizing good formaldehyde removing effect.
(III) Water-soluble product with high safety
All components of the environment-friendly formaldehyde scavenger provided by the invention are water-soluble components, and the persimmon tannin and the water-soluble chitosan are extracted naturally, so that the environment-friendly formaldehyde scavenger is safe and environment-friendly, cannot cause secondary harm to a human body and the environment, and is convenient to use.
(IV) the usage amount can be determined according to the pollution degree
The environment-friendly formaldehyde scavenger provided by the invention is sprayed by a small handheld sprayer, the use amount and use concentration of the formaldehyde scavenger can be determined according to the formaldehyde content in the air, and the environment-friendly formaldehyde scavenger has the characteristics of large removal range and high removal efficiency.
(V) physical adsorption and chemical reaction
The water-soluble chitosan (chitin) contained in the environment-friendly formaldehyde scavenger provided by the invention is a high-molecular polymer, the odor molecules can be adsorbed by huge intermolecular attraction, the adsorbed odor molecules such as formaldehyde, acetaldehyde and the like are removed by the rapid chemical reaction of the amino group of the active phenolic group or cysteine hydrochloride in the persimmon tannin, the physical adsorption and the chemical reaction are effectively combined together, and the formaldehyde removal efficiency is greatly improved.
Drawings
FIG. 1 shows the results of formaldehyde removal performance tests.
Detailed Description
The technical solution of the present invention will be further explained below with reference to specific examples, but the present invention is not limited to the following embodiments.
Example 1
A preparation method of an environment-friendly formaldehyde scavenger.
The formula of the environment-friendly formaldehyde scavenger comprises the following components: 5g of persimmon tannin (FG-70), 3g of cysteine hydrochloride, 1g of glycerol, 1g of water-soluble chitosan, 0.05g of cason, 0.05g of fatty alcohol polyoxyethylene ether and 89.9g of deionized water.
The preparation method of the environment-friendly formaldehyde scavenger comprises the following steps:
(1) weighing 1g of water-soluble chitosan, and dissolving in 89.9g of deionized water to obtain a solution A;
(2) weighing 3g of cysteine hydrochloride, adding the cysteine hydrochloride into the solution A, and stirring and dissolving to obtain a solution B;
(3) weighing 5g of persimmon tannin (FG-70), 1g of glycerol, 0.05g of kason and 0.05g of fatty alcohol polyoxyethylene ether, sequentially adding the weighed materials into the solution B, and uniformly stirring to obtain the environment-friendly formaldehyde scavenger.
Example 2
A preparation method of an environment-friendly formaldehyde scavenger.
The formula of the environment-friendly formaldehyde scavenger comprises the following components: 3g of persimmon tannin (FG-70), 2g of cysteine hydrochloride, 0.5g of glycerol, 0.5g of water-soluble chitosan, 0.05g of kason, 0.05g of fatty alcohol polyoxyethylene ether and 93.9g of deionized water.
The preparation method of the environment-friendly formaldehyde scavenger comprises the following steps:
(1) weighing 0.5g of water-soluble chitosan, and dissolving in 93.9g of deionized water to obtain a solution A;
(2) weighing 2g of cysteine hydrochloride, adding the cysteine hydrochloride into the solution A, and stirring and dissolving to obtain a solution B;
(3) weighing 3g of persimmon tannin (FG-70), 0.5g of glycerol, 0.05g of kason and 0.05g of fatty alcohol polyoxyethylene ether, sequentially adding the weighed materials into the solution B, and uniformly stirring to obtain the environment-friendly formaldehyde scavenger.
Example 3
A preparation method of an environment-friendly formaldehyde scavenger.
The formula of the environment-friendly formaldehyde scavenger comprises the following components: 4g of persimmon tannin (FG-70), 2.5g of cysteine hydrochloride, 0.7g of glycerol, 0.8g of water-soluble chitosan, 0.05g of kason, 0.05g of fatty alcohol-polyoxyethylene ether and 91.9g of deionized water.
The preparation method of the environment-friendly formaldehyde scavenger comprises the following steps:
(1) weighing 0.8g of water-soluble chitosan, and dissolving in 91.9g of deionized water to obtain a solution A;
(2) weighing 2.5g of cysteine hydrochloride, adding the cysteine hydrochloride into the solution A, and stirring and dissolving to obtain a solution B;
(3) weighing 4g of persimmon tannin (FG-70), 0.7g of glycerol, 0.05g of kason and 0.05g of fatty alcohol polyoxyethylene ether, sequentially adding the weighed materials into the solution B, and uniformly stirring to obtain the environment-friendly formaldehyde scavenger.
Example 4
The formaldehyde removal effect of the environment-friendly formaldehyde scavenger prepared by the invention is determined according to the method described in QB/T2761-2006 (determination method for the purification effect of indoor air purification products).
The test treatment agents of this test were the agents prepared by the methods described in examples 1 to 3, and the test control treatment agents were set in 3 groups, comparative example 1, comparative example 2, and comparative example 3, respectively, and the preparation methods were the same as in examples 1 to 3, except that the control treatment agents were not added with a water-soluble chitosan component, and water was used as a blank control, and each treatment was repeated 3 times.
100mL of the above-mentioned agents are respectively placed in a test chamber after drying for testing, the specific test and measurement method refer to QB/T2761-2006, and the result data is shown in Table 1.
TABLE 1 Formaldehyde removal test
The results in table 1 show that the environment-friendly formaldehyde scavenger provided by the invention has a formaldehyde removal rate of more than 95% and a significant removal effect. The formaldehyde removing effect of the contrast treatment agent is slightly low, which shows that the water-soluble chitosan component in the composition is beneficial to improving the reaction efficiency of the persimmon tannin and formaldehyde and improving the formaldehyde clearance rate.
Example 5
In order to further explore the formaldehyde removing performance of the environment-friendly formaldehyde scavenger provided by the invention, the inventor compares the formaldehyde scavenger provided by the invention with a commercially available formaldehyde scavenger to explore the formaldehyde removing effect.
Specifically, the test conditions are shown in table 2.
TABLE 2 Formaldehyde removal Performance test conditions
Through test, the formaldehyde decomposition rate of the A-type formaldehyde scavenger at the 90 th time is 34.29%, the formaldehyde of the B-type formaldehyde scavenger at the 78 th time is basically completely decomposed, the formaldehyde of the product of the invention is basically completely decomposed at the 32 th time, and the formaldehyde decomposition rate of the blank control at the 90 th time is 3.42%. The result shows that compared with the formaldehyde scavenger sold in the market, the formaldehyde scavenger provided by the invention can remove formaldehyde in a short time, and has the characteristics of high removal efficiency and wide removal range.
As described above, the present invention can be preferably implemented, and the above-mentioned embodiments are merely descriptions of preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes and modifications made to the technical scheme of the present invention by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the present invention.
Claims (9)
1. The environment-friendly formaldehyde scavenger is characterized in that effective components of the environment-friendly formaldehyde scavenger comprise persimmon tannin, cysteine hydrochloride and water-soluble chitosan.
2. The environment-friendly formaldehyde scavenger according to claim 1, wherein the formula comprises, by mass, 3-5% of persimmon tannin, 2-3% of cysteine hydrochloride, and 0.5-1% of water-soluble chitosan.
3. The environment-friendly formaldehyde scavenger according to claim 1, wherein the formaldehyde scavenger is prepared in a spray formulation convenient for use, and the formulation components further comprise an auxiliary agent or a carrier for assisting the effective components to exert effects.
4. The environment-friendly formaldehyde scavenger according to claim 1, wherein the adjuvant or carrier comprises glycerol, carbone, fatty alcohol-polyoxyethylene ether, and deionized water.
5. The environment-friendly formaldehyde scavenger according to claim 1, wherein the auxiliary agent or the carrier comprises, in mass percent: 0.5-1% of glycerol, 0.05% of carbazone, 0.05% of fatty alcohol-polyoxyethylene ether and 89-94% of deionized water.
6. A method for preparing the environment-friendly formaldehyde scavenger as defined in any one of claims 1 to 5.
7. The method for preparing the environment-friendly formaldehyde scavenger according to claim 6, comprising the following steps:
dissolving water-soluble chitosan in deionized water to obtain a solution A;
dissolving cysteine hydrochloride in the solution A to obtain a solution B;
and sequentially adding the persimmon tannin, the glycerol, the kaempferol and the fatty alcohol-polyoxyethylene ether into the solution B, and uniformly stirring to obtain the environment-friendly formaldehyde scavenger.
8. The preparation method of the environment-friendly formaldehyde scavenger as claimed in claim 6, wherein the formula components of the environment-friendly formaldehyde scavenger comprise, by mass, 3-5% of persimmon tannin, 0.5-1% of glycerol, 2-3% of cysteine hydrochloride, 0.5-1% of water-soluble chitosan, 0.05% of kaempferol, 0.05% of fatty alcohol-polyoxyethylene ether and 89-94% of deionized water.
9. Use of the environment-friendly formaldehyde scavenger according to any one of claims 1 to 5 in air purification.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117138515A (en) * | 2023-11-01 | 2023-12-01 | 常州绿养源环保科技股份有限公司 | Environment-friendly sterilization formaldehyde-removing composition and preparation method thereof |
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