CN108299956B

CN108299956B - Formaldehyde-removing odor-removing sealing agent and preparation method thereof

Info

Publication number: CN108299956B
Application number: CN201710785340.3A
Authority: CN
Inventors: 李浪; 胡朝建; 张金明
Original assignee: Suzhou Bybk Materials Technology Co ltd
Current assignee: Beiken (Zhejiang) Technology Development Co.,Ltd.
Priority date: 2017-09-04
Filing date: 2017-09-04
Publication date: 2020-09-04
Anticipated expiration: 2037-09-04
Also published as: CN108299956A

Abstract

The invention provides an aldehyde-removing odor-removing sealant and a preparation method thereof. The aldehyde-removing odor-removing sealing agent comprises the following substances in percentage by mass: 4-20% of a film forming agent, 0.1-5% of nano anion powder, 0.5-5% of benzene-series substance decomposing enzyme, 0.5-5% of ester decomposing enzyme, 0.5-5% of formaldehyde decomposing enzyme, 0.03-0.05% of an activator, 0.1-2% of a stabilizing humectant and the balance of water, wherein the film forming agent is water-soluble chitosan. According to the invention, through reasonably controlling the preparation raw materials and the proportion, the obtained aldehyde-removing odor-purifying sealing agent is safe and environment-friendly, and has good and lasting purification effect on indoor polluted air. The preparation process is simple, and the prepared formaldehyde-removing odor-removing sealant can be directly brushed and sprayed on base materials such as furniture, wallpaper, sound-absorbing boards, carpets, floors and the like to adsorb and decompose pollution gases such as formaldehyde, TVOC and the like in the air.

Description

Formaldehyde-removing odor-removing sealing agent and preparation method thereof

Technical Field

The invention belongs to the technical field of air purification, and relates to an aldehyde-removing odor-purifying sealant and a preparation method thereof.

Background

In recent years, indoor pollution has become an important threat to the health life of human homes, and the data statistics of the national environmental protection association show that: luxurious decoration has been carried out in 90% of leukemia patients at home, and 210 tens of thousands of children die of the luxurious decoration every year; 80% of formaldehyde in home decoration exceeds the standard; 70% of pregnant women have abortion and environmental pollution; the death number of Chinese people caused by indoor environmental pollution reaches 11.1 ten thousand every year, and 304 people die each day on average. Indoor environmental pollution has become one of the killers that seriously affect the health of modern human beings. In the process of interior decoration, wood boards, glue, wall coatings and furniture contain more or less harmful substances such as formaldehyde, benzene series and the like, and the harmful substances are gradually emitted in years or even tens of years after decoration, so that the health of human bodies is influenced.

In order to solve the problem of indoor air pollution, currently, air purification products widely used in the market include water-based paints with air purification function, such as photocatalyst interior wall paints, air purification paints containing nano negative ions, environmental protection emulsion paints, and the like; also comprises air purification products such as an air filter, active carbon and the like. However, the air purification product in the prior art needs to improve the pollutant purification effect and has poor purification effect durability.

CN105969007A discloses an acrylic latex paint with air purification function and a preparation method thereof. The emulsion paint comprises the following components in parts by mass: 45-55 parts of acrylic emulsion, 4-6 parts of quartz powder, 1-2 parts of phenoxy resin, 2-4 parts of bletilla striata powder, 1-3 parts of corn starch, 0.25-0.75 part of glutaraldehyde, 2-4 parts of air purification particles, 0.04-0.06 part of defoaming agent, 0.04-0.06 part of dispersing agent and 30-40 parts of water. The acrylic latex paint disclosed by the invention has good film-forming property and stain resistance and large adsorption capacity, but the acrylic latex as a raw material is not environment-friendly, and the air purification effect and durability need to be improved.

CN1803949A discloses a building coating material with air purification function and a preparation method thereof, wherein the coating material mainly comprises a photocatalyst, a film forming substance, a pigment filler, an auxiliary agent and water; the contents of various substances in percentage by weight are as follows: the building coating material is characterized by comprising the following components, by weight, 15-25% of a photocatalyst TiO2-XNX 1%, 15-25% of a film forming substance polyacrylate emulsion, 0.8-2.0% of a dispersant polyacrylate ammonium salt, 0.2-0.5% of a wetting agent, 0.1-0.2% of hydroxyethyl cellulose, 0.6-0.8% of a defoaming agent, 7-9% of pigment titanium dioxide, 25-30% of filler heavy calcium carbonate, 8-10% of kaolin, 4-5% of talcum powder, 0.8-1.0% of a film forming auxiliary agent, 1.8-2.0% of propylene glycol, 0.5-1.0% of a thickening agent and 20-30% of solvent water.

CN104874286A discloses an immobilized enzyme formaldehyde-removing environment-friendly compound film agent, the formula of which comprises complex enzyme, chitin, an immobilized carrier material, water and an activator, the compound film agent can be coated on wood, boards, leather, plastics, glass, wall materials, non-woven fabrics or paper materials, and can adsorb and degrade formaldehyde, benzene, toluene, xylene, PM2.5, ammonia and TVOC which are aldehyde-like refractory organic pollutants, thereby achieving the purpose of purifying air. However, the long-lasting effect of the complex enzyme of the invention needs to be improved.

Disclosure of Invention

Aiming at the defects of the prior art, one of the purposes of the invention is to provide an aldehyde-removing odor-purifying sealant which is safe and environment-friendly, can effectively adsorb and decompose pollutants such as formaldehyde, TVOC and the like in the air and has a more lasting purification effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

an aldehyde-removing odor-removing sealant comprises the following substances in percentage by mass:

wherein the film forming agent is water-soluble chitosan.

The aldehyde-removing odor-removing sealing agent disclosed by the invention comprises the following raw materials in parts by weight:

the mass percentage of the water-soluble chitosan is 4-20%, for example, the mass percentage of the water-soluble chitosan is 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, preferably 5-8%;

the mass percentage of the nanometer negative ion powder is 0.1-5%, for example, the mass percentage of the nanometer negative ion powder is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, preferably 1-1.5%;

0.5 to 5% by mass of the benzene-based decomposition enzyme, for example, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, preferably 2 to 3% by mass of the benzene-based decomposition enzyme;

the mass percentage of the lipolytic enzyme is 0.5-5%, for example, the mass percentage of the lipolytic enzyme is 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, preferably 1-2%;

the mass percentage of the formaldehyde-decomposing enzyme is 0.5-5%, for example, the mass percentage of the formaldehyde-decomposing enzyme is 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, preferably 1-2%;

the mass percentage of the activator is 0.03-0.05%, for example, the mass percentage of the activator is 0.03%, 0.035%, 0.04%, 0.045% and 0.05%;

the mass percentage of the stabilizing humectant is 0.1-2%, for example, the mass percentage of the stabilizing humectant is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, preferably 0.8-1%;

the balance being water.

Preferably, the aldehyde-removing odor-purifying blocking agent comprises the following substances in percentage by mass:

the water-soluble chitosan film forming agent takes the water-soluble chitosan as the film forming agent, a large number of amino groups on the structure of the water-soluble chitosan can react with formaldehyde, the formaldehyde in polluted air can be effectively removed, and compared with the common acrylate film forming agent in the prior art, the water-soluble chitosan film forming agent has the advantages of safety and environmental protection. Water-soluble chitosan is a derivative of chitosan, typically by reacting chitosan with chloroacetic acid under alkaline conditions to form-CH₂COOH to chitosan-NH₂Or on-OH, carboxymethyl chitosan is very water soluble. The water solubility of chitosan is related to the degree of deacetylation of chitosan and the molecular weight of chitosan. In general, the higher the degree of deacetylation, the better the water solubility; the influence of molecular weight on water solubility is more obvious, and the low molecular weight chitosan has good water solubility. High molecular weight chitosan is poorly soluble and requires acidic conditions for dissolution. Preferably, the present inventionThe molecular weight of the water-soluble chitosan (2) is 20000-40000, for example, the molecular weight of the water-soluble chitosan is 20000, 25000, 30000, 35000 and 40000.

The water-soluble chitosan is carboxymethyl chitosan and/or chitosan quaternary ammonium salt.

The nanometer negative ion powder is also called tourmaline negative ion powder, and its components are silicate matter with ring structure of aluminum, sodium, iron and lithium and with boron as characteristic, and the negative oxygen ion produced in the negative ion powder has high activity and strong redox effect, so that it can eliminate effectively the irritant gas of benzene, formaldehyde, ketone, ammonia, etc. volatilized from decorating material in the indoor decoration process to improve air pollution effectively.

The particle size of the nanometer anion powder is 1500-4000 meshes, for example, the particle size of the nanometer anion powder is 1500, 2000, 2500, 3000, 3500 and 4000.

The ester decomposition enzyme is selected from one or a mixture of at least two of pectinase, carboxylesterase and lipase. Typical but non-limiting examples of such mixtures are mixtures of two lipolytic enzymes, e.g. mixtures of pectinases and carboxylesterases, mixtures of carboxylesterases and lipases, mixtures of pectinases and lipases; the mixture may also be a mixture of three lipolytic enzymes, for example a mixture of pectinases, carboxylesterases and lipases.

The formaldehyde lyase is formaldehyde dehydrogenase.

The activator is glutathione.

The stabilizing humectant is tween and/or glycerol.

The water-soluble chitosan, the nano negative ion powder, the benzene series decomposition enzyme, the ester decomposition enzyme, the formaldehyde decomposition enzyme and other biological enzymes in the invention have synergistic effect, can adsorb and decompose the formaldehyde, TVOC (volatile organic compound for short) and other pollution gases in the polluted air, and the addition of the activator and the stabilizing humectant increases the long-acting property of the enzyme.

The invention also aims to provide a preparation method of the aldehyde-removing odor-removing sealing agent, which comprises the following steps: dissolving 4-20% of water-soluble chitosan in water by mass percent, adding 0.1-5% of nano negative ion powder into the solution, stirring and dissolving, then adding 0.5-5% of benzene-series decomposition enzyme, 0.5-5% of ester decomposition enzyme, 0.5-5% of formaldehyde decomposition enzyme, 0.03-0.05% of activator, 0.1-2% of stabilizing humectant and the balance of water, and continuously stirring to prepare the aldehyde-removing and odor-removing sealing agent.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, the preparation raw materials and the proportion are reasonably controlled, the obtained formaldehyde-removing odor-purifying sealing agent has a good purification effect on indoor polluted air, and the removal rate of formaldehyde, TVOC and other polluted gases reaches more than 96% after the formaldehyde-removing odor-purifying sealing agent is used for 24 hours; the purifying effect is durable, and the removing rate of the formaldehyde and TVOC pollution gas can still reach more than 93 percent after the formaldehyde removing and odor purifying sealing agent is used for 28 days.

(2) The preparation raw materials do not contain acrylic esters, and the preparation method is safe and environment-friendly.

(3) The preparation process of the aldehyde-removing odor-purifying sealant is simple, and the prepared aldehyde-removing odor-purifying sealant can be directly brushed and sprayed on base materials such as furniture, wallpaper, acoustic boards, carpets, floors and the like to adsorb and decompose pollution gases such as formaldehyde, TVOC and the like in the air.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.

Example 1

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: dissolving 4% of carboxymethyl chitosan in water by mass percent, adding 0.1% of nano anion powder with the particle size of 1500 meshes into the solution, stirring and dissolving, then adding a mixture of 0.5% of benzene-series decomposition enzyme, 0.5% of pectinase, carboxylesterase, 1% of formaldehyde dehydrogenase, 0.03% of glutathione, 0.1% of tween and the balance of water, and continuously stirring to prepare the aldehyde-removing and odor-removing sealant.

Example 2

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: according to the mass percentage, 5 percent of chitosan quaternary ammonium salt is dissolved in water, 0.6 percent of nano negative ion powder with the particle size of 3000 meshes is added into the solution and stirred for dissolution, and then 1 percent of benzene series decomposition enzyme, 1 percent of carboxylesterase, 0.8 percent of formaldehyde dehydrogenase, 0.04 percent of glutathione, 0.5 percent of glycerol and the balance of water are added for continuous stirring, thus obtaining the aldehyde-removing and odor-removing sealant.

Example 3

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: according to the mass percentage, 8 percent of carboxymethyl chitosan is dissolved in water, 1 percent of nano negative ion powder with the grain diameter of 3500 meshes is added into the solution and stirred to be dissolved, and then 2 percent of benzene-series decomposition enzyme, 1.5 percent of mixture of carboxylesterase and lipase, 1.3 percent of formaldehyde dehydrogenase, 0.05 percent of glutathione, 0.8 percent of glycerol and the balance of water are added and stirred continuously to prepare the aldehyde-removing and odor-removing sealant.

Example 4

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: according to the mass percentage, 10 percent of carboxymethyl chitosan is dissolved in water, 1.5 percent of nano negative ion powder with the grain diameter of 4000 meshes is added into the solution to be stirred and dissolved, and then 3 percent of benzene-series decomposition enzyme, 2 percent of pectinase, a mixture of carboxylesterase and lipase, 1.8 percent of formaldehyde dehydrogenase, 0.04 percent of glutathione, 1 percent of glycerol and the balance of water are added to be continuously stirred, thus obtaining the aldehyde-removing and odor-removing sealant.

Example 5

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: dissolving 15% of carboxymethyl chitosan in water by mass percent, adding 3% of nano negative ion powder with the particle size of 3000 meshes into the solution, stirring and dissolving, then adding 4% of benzene-series decomposer, 4% of pectinase, a mixture of carboxylesterase and lipase, 3% of formaldehyde dehydrogenase, 0.03% of glutathione, 1.5% of tween and the balance of water, and continuously stirring to prepare the aldehyde-removing and odor-purifying sealant.

Example 6

In this embodiment, the composition and the ratio of the raw materials are adjusted according to the following method: dissolving 20% of a mixture of carboxymethyl chitosan and chitosan quaternary ammonium salt in water, adding 5% of nano negative ion powder with the particle size of 3000 meshes into the solution, stirring and dissolving, then adding 3% of benzene-series decomposition enzyme, 5% of lipase mixture, 2% of formaldehyde dehydrogenase, 0.02% of glutathione, 2% of glycerol and the balance of water, and continuously stirring to prepare the aldehyde-removing and odor-removing sealant.

Comparative example 1

The comparative example is prepared by adjusting the composition and the proportion of the raw materials according to the following method: according to the mass percentage, 8 percent of carboxymethyl chitosan is dissolved in water, 2 percent of benzene-series substance decomposing enzyme, 1.5 percent of mixture of carboxylesterase and lipase, 1.3 percent of formaldehyde dehydrogenase, 0.05 percent of glutathione, 0.8 percent of glycerol and the balance of water are added into the solution to be continuously stirred, and the aldehyde-removing and odor-removing sealant is prepared.

Comparative example 2

The comparative example is prepared by adjusting the composition and the proportion of the raw materials according to the following method: according to the mass percentage, 8 percent of carboxymethyl chitosan is dissolved in water, 1 percent of nano negative ion powder with the grain diameter of 3500 meshes is added into the solution and stirred to be dissolved, and then 0.05 percent of glutathione, 0.8 percent of glycerol and the balance of water are added and stirred continuously to prepare the aldehyde-removing and odor-removing sealant.

Comparative example 3

The comparative example is prepared by adjusting the composition and the proportion of the raw materials according to the following method: according to the mass percentage, 8 percent of carboxymethyl chitosan is dissolved in water, 1 percent of nano negative ion powder with the grain diameter of 3500 meshes is added into the solution to be stirred and dissolved, and then 2 percent of benzene-series decomposition enzyme, 1.5 percent of mixture of carboxylesterase and lipase, 1.3 percent of formaldehyde dehydrogenase, 0.8 percent of glycerol and the balance of water are added and stirred continuously to prepare the aldehyde-removing and odor-removing sealant.

Comparative example 4

The comparative example is prepared by adjusting the composition and the proportion of the raw materials according to the following method: according to the mass percentage, 8 percent of carboxymethyl chitosan is dissolved in water, 1 percent of nano negative ion powder with the grain diameter of 3500 meshes is added into the solution and stirred to be dissolved, and then 2 percent of benzene-series decomposition enzyme, 1.5 percent of mixture of carboxylesterase and lipase, 1.3 percent of formaldehyde dehydrogenase, 0.05 percent of glutathione and the balance of water are added and stirred continuously to prepare the aldehyde-removing and odor-removing sealant.

The performance of the aldehyde-removing odor-removing sealing agent prepared in examples 1-6 and comparative examples 1-4 of the present invention was tested with reference to the standard of JCT-1074-2008 "indoor air purification function coating material purification performance", the content of gas components was measured 24h and 28 days after spraying, and the results of the removal rate of each of the pollutant gas components are shown in Table 1.

TABLE 1

According to the invention, through reasonably controlling the preparation raw materials and the proportion, the obtained formaldehyde-removing odor-purifying sealing agent has a good purification effect on indoor polluted air, and the removal rate of formaldehyde, TVOC and other polluted gases after 24 hours of use reaches more than 96%; the purifying effect is durable, and the removing rate of the formaldehyde and TVOC pollution gas can still reach more than 93 percent after the formaldehyde removing and odor purifying sealing agent is used for 28 days. The aldehyde-removing odor-purifying sealing agent disclosed by the invention is simple in preparation process, safe and environment-friendly, and can be directly brushed and sprayed on base materials such as furniture, wallpaper, acoustic boards, carpets and floors to adsorb and decompose pollution gases such as formaldehyde and TVOC in the air.

The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims

1. The aldehyde-removing odor-removing sealant is characterized by comprising the following substances in percentage by mass:

wherein the film forming agent is water-soluble chitosan;

the molecular weight of the water-soluble chitosan is 20000-40000;

the activator is glutathione;

the stabilizing humectant is tween and/or glycerol.

2. The aldehyde-removing odor-removing sealant according to claim 1, which comprises the following substances in percentage by mass:

3. the aldehyde-removing odor-removing blocking agent as claimed in claim 1, wherein the water-soluble chitosan is carboxymethyl chitosan and/or chitosan quaternary ammonium salt.

4. The aldehyde-removing odor-removing sealing agent as claimed in claim 1, wherein the particle size of the nano anion powder is 1500-4000 meshes.

5. The aldehyde-removing odor-removing blocking agent as claimed in claim 1, wherein the ester-decomposing enzyme is selected from one or a mixture of at least two of pectinase, carboxylesterase and lipase.

6. The aldehyde-removing odor-removing blocking agent according to claim 1, wherein the formaldehyde-decomposing enzyme is formaldehyde dehydrogenase.

7. A method for preparing the aldehyde-removing odor-removing blocking agent according to any one of claims 1 to 6, wherein the method comprises the steps of: dissolving 4-20% of water-soluble chitosan in water by mass percent, adding 0.1-5% of nano negative ion powder into the solution, stirring and dissolving, then adding 0.5-5% of benzene-series decomposition enzyme, 0.5-5% of ester decomposition enzyme, 0.5-5% of formaldehyde decomposition enzyme, 0.03-0.05% of activator, 0.1-2% of stabilizing humectant and the balance of water, and continuously stirring to prepare the aldehyde-removing and odor-removing sealing agent.