CN114085049B - Environment-friendly mineral wall glaze for interior and exterior of buildings and preparation method thereof - Google Patents
Environment-friendly mineral wall glaze for interior and exterior of buildings and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/301—Oxides other than silica porous or hollow
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/149—Iron-sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/02—Alcohols; Phenols; Ethers
- C04B24/023—Ethers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/30—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Other silicon-containing organic compounds; Boron-organic compounds
- C04B26/32—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Other silicon-containing organic compounds; Boron-organic compounds containing silicon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
Abstract
The invention discloses an environment-friendly mineral wall glaze for interior and exterior of buildings and a preparation method thereof, wherein the raw materials of the environment-friendly mineral wall glaze for interior and exterior of buildings at least comprise the following components in percentage by mass: 10-25% of polymer emulsion, 4-6% of film-forming assistant, 25-40% of mineral salt, 5-10% of metal oxide nanoparticles and the balance of deionized water. The wall glaze paint prepared in the application of the invention has good coating property and leveling property, can effectively remove toxic gases such as formaldehyde in the environment, has good light-resistant and yellowing-resistant effects, has extremely strong washing resistance, is suitable for popularization in the field of wall glaze paints, and has wide development prospects.
Description
Technical Field
The invention relates to the field of IPC classified C09D, in particular to an environment-friendly mineral wall glaze for interior and exterior buildings and a preparation method thereof.
Background
At present, the coating of the building material adopted in the market is usually an epoxy resin raw material, and pigments, solvents, auxiliaries and the like are added. However, in the building decoration industry of today, the existing common interior wall coating has obvious defects of poor covering capability, easy powder removal, poor water washing resistance and the like, and along with the social progress and economic development, the requirements of people on building wall coatings do not meet the requirements of simple coating coatings.
With the increasing demands on the residential and office environment, the market share of wall glazes, an emerging coating product, is gradually rising. For example, people usually pay attention to the harm of formaldehyde to human bodies when decorating new houses, and some prior art coatings add nanoparticle fillers as formaldehyde removers, such as photocatalyst particles of titanium dioxide, zinc oxide and the like. However, although the addition of the similar particles can improve the removal effect of the coating on the pollution gases such as formaldehyde to a certain extent, the introduction of a large amount of hydrophilic groups can obviously reduce the water washing resistance of the coating such as wall glaze, and the like, so that the water washing resistance is irretrievably lost.
Therefore, there is a need to develop a wall glaze paint which can effectively remove harmful gases such as formaldehyde in an environment-friendly manner and has long-term effective light-resistant yellowing-resistant property and water-washing resistant property.
Disclosure of Invention
The invention provides an environment-friendly mineral wall glaze for interior and exterior of buildings, which is prepared from the following raw materials in percentage by mass: 10-25% of polymer emulsion, 4-6% of film-forming additive, 25-40% of mineral salt, 5-10% of metal oxide nano particles and the balance of deionized water.
In a preferred embodiment, the polymer emulsion is at least one of a pure acrylic emulsion, an acrylate emulsion, a silicone acrylic emulsion, a polyacrylamide emulsion, a styrene-acrylic emulsion, and an acrylate-methyl methacrylate-styrene copolymer emulsion.
As a more preferred scheme, the polymer emulsion is polyacrylamide emulsion and acrylate emulsion.
As a preferable scheme, the mass ratio of the polyacrylamide emulsion to the acrylate emulsion is 6-7: 2 to 3.
In a preferred embodiment, the film forming aid is at least one of a glycol ester, polyvinylpyrrolidone, dipropylene glycol methyl ether, dipropylene glycol butyl ether, dipropylene glycol phenyl ether, and polyurethane.
In a more preferred embodiment, the film forming aid is dipropylene glycol methyl ether and polyvinylpyrrolidone.
In a preferred embodiment, the mass ratio of dipropylene glycol methyl ether to polyvinylpyrrolidone is 1.2 to 1.4:1.
as a preferred embodiment, the mineral salt is at least one of calcium salt, magnesium salt, iron salt, sodium salt and zinc salt.
As a more preferred embodiment, the mineral salts are calcium chloride and ferrous sulfate.
As a preferable scheme, the mass ratio of the calcium chloride to the ferrous sulfate is 1:1.2.
in a preferred embodiment, the metal oxide nanoparticles are at least one of titanium dioxide, silicon dioxide, antimony dioxide, tin dioxide and zinc oxide.
As a preferable scheme, the metal oxide nanoparticles are mesoporous metal oxide nanoparticles.
In a more preferred embodiment, the metal oxide nanoparticles are mesoporous tin dioxide.
In the application, the light resistance and the toxic gas removal effect of the wall glaze are effectively improved by adding the mesoporous tin dioxide. The applicant speculates that: when mesoporous tin dioxide is used as an auxiliary particle, the surface mesopores of the mesoporous tin dioxide can effectively adsorb gases such as formaldehyde and the like through capillary action, and meanwhile, the mesoporous tin dioxide has a good photo-excited electronic effect and can effectively form a strong oxidation effect, so that the adsorbed formaldehyde gas is oxidized and degraded, compared with common tin dioxide particles, the mesoporous tin dioxide particles have a more through hole structure and a larger specific surface area, photo-generated carriers have a stronger surface transfer effect, the ultraviolet light energy absorption and illumination reflection effects of the tin dioxide are enhanced, and the mesoporous tin dioxide can also form an effective dispersion effect under the synergistic effect of a film-forming auxiliary agent, so that the agglomeration phenomenon is reduced.
As a most preferable scheme, the metal oxide nanoparticles are compound modified mesoporous tin dioxide.
In a preferred embodiment, the mesoporous metal oxide nanoparticles have an average particle diameter of 100 to 500nm.
In a more preferred embodiment, the mesoporous metal oxide nanoparticles have an average particle diameter of 150 to 200nm.
The preparation steps of the compound modified mesoporous tin dioxide comprise the following steps: (1) Respectively weighing stannic chloride pentahydrate, urea and polyvinylpyrrolidone, adding into methanol, and stirring until the materials are completely dissolved; (2) reacting the dissolved solution at the high temperature of 180-190 ℃ for 8-10 hours; (3) After the reaction is finished, drying the precipitate, and calcining the precipitate in a muffle furnace at 550 ℃ for 1.5 hours to obtain mesoporous tin dioxide; (4) Then adding the mesoporous tin dioxide into a DMF solution containing succinic anhydride and 3-aminopropyltriethoxysilane, and heating for 2-4 hours at the temperature of 60-65 ℃; (5) And after the reaction is finished, filtering and drying, adding the product into a mixed methanol solution containing dimethylimidazole and zinc nitrate, and heating and carrying out ultrasonic reaction for 2-4 hours at the temperature of 60-80 ℃ to obtain the compound modified mesoporous tin dioxide.
The applicant finds that when mesoporous tin dioxide is adopted, the mesoporous effect of the mesoporous tin dioxide not only has an adsorption effect on gases such as formaldehyde, but also easily generates an adsorption effect on moisture in the use process of the wall glaze, and the moisture is difficult to separate from the mesoporous, so that the light resistance and the water washing resistance of the wall glaze are obviously reduced. The application further discovers that when mesoporous tin dioxide modified by imidazole is adopted and the particle size of the mesoporous tin dioxide is 150-220 nm, the adsorption of moisture can be effectively inhibited, and the light resistance, the water resistance and the washing resistance of the wall glaze can be further improved. The applicant speculates that: the imidazole modified mesoporous tin dioxide adopted in the application can be compounded and combined with the formed imidazole framework through the active group on the surface of the pretreated mesoporous tin dioxide to form a special PN junction structure, so that the transmission efficiency of a photon-generated carrier is further improved, a stable electron-hole state can be formed, the electron reflux is reduced, and the light absorption capacity and the light reflection efficiency of the composite particles are obviously enhanced; meanwhile, the formation of the imidazole skeleton structure and the coordination bond combination formed by the mesoporous tin dioxide can fully embody the hydrophobic property of the imidazole skeleton structure, reduce the influence of water molecules on mesopores, when the particle size of the mesoporous tin dioxide is larger, the mesoporous tin dioxide cannot effectively form stable coordination connection with the imidazole skeleton, and when the particle size is smaller, the light resistance and the gas removal effect of the wall glaze can be obviously influenced.
As a preferable scheme, the mass ratio of the polymer emulsion to the mineral salt is 3-4: 6 to 7.
As a more preferred embodiment, the mass ratio of the polymer emulsion to the mineral salt is 3.5:6.5.
according to the invention, the polyacrylamide emulsion and the acrylate emulsion are added to cooperate with calcium chloride in mineral salt, so that the waterproof and water-washing resistant performances of the wall glaze are further improved, and the wall glaze has a long-term air purification effect. The applicant speculates that: when the emulsion adopts polyacrylamide emulsion and acrylate emulsion, and calcium chloride is contained in mineral salt, the acrylate emulsion can form effective synergistic action with calcium hydroxide generated by hydration in a system to generate a macromolecular network structure combined by ionic bonds, and promotes active substances in the mixed emulsion and acidic substances in the air such as carbon dioxide and the like to form insoluble substances to fill up redundant vacant attacks and cracks, but provides a suitable premise for effective contact and explanation of harmful gases such as formaldehyde and the like and composite nanoparticles.
As a preferable embodiment, the mass ratio of the metal oxide nanoparticles to the film-forming assistant is 6 to 9:5 to 5.5.
As a more preferred embodiment, the mass ratio of the metal oxide nanoparticles to the coalescent is 7:5.5.
the invention provides a preparation method of the environment-friendly mineral wall glaze for interior and exterior of buildings, which comprises the following steps: (1) Sequentially adding deionized water, polymer emulsion and mineral salt into a stirring kettle, and stirring at 1200-1400 rpm for 60-90 minutes; (2) After stirring, adding the metal oxide nano particles and the film-forming additive, and stirring at 500-800 rpm for 60-80 minutes; (3) After stirring, heating to 50-60 ℃, keeping the temperature for 60-100 minutes, cooling and canning to obtain the product.
Has the advantages that:
1. the wall glaze paint prepared in the application of the invention has good coating property and leveling property, can effectively remove toxic gases such as formaldehyde and the like in the environment, has good light-resistant and yellowing-resistant effects, and has extremely strong water washing resistance.
2. In the application of the invention, the light resistance of the wall glaze material is effectively further improved through the modification of the mesoporous particles, and the service life of the wall glaze is obviously prolonged. And the strong oxidation catalysis misuse of the catalyst can also effectively remove some toxic gases.
3. According to the invention, the light resistance and the gas removal performance can be further improved by modifying the mesoporous particles, and meanwhile, the water absorption phenomenon caused by the addition of the mesoporous particles can be effectively enhanced, the affinity degree of the mesoporous particles and water is reduced, and the water washing resistance of the wall glaze is finally improved.
4. In the invention, through effective compounding of the polymer emulsion and the mineral salt, a complex and compact network interweaving structure is formed in the wall glaze, the reaction activity of active substances in the emulsion and substances such as carbon dioxide and sulfur dioxide in the air is promoted, a proper amount of insoluble crystals are formed in the drying process of the wall glaze, film holes with proper size are generated with the help of a film forming aid, and the water washing resistance and the toxic gas removal performance of the wall glaze are further improved.
Detailed Description
The contents of the present invention can be more easily understood by referring to the following preferred embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
Example 1
The first aspect of the embodiment 1 provides an environment-friendly mineral wall glaze for interior and exterior buildings, which comprises the following raw materials in percentage by mass: 17.25% of polymer emulsion, 5.5% of film-forming additive, 32.5% of mineral salt, 7% of compound modified mesoporous tin dioxide and the balance of deionized water.
In this embodiment, the polymer emulsion is a polyacrylamide emulsion and an acrylate emulsion, and the mass ratio of the polyacrylamide emulsion to the acrylate emulsion is 6.5:2.5.
in this example, the film-forming assistant is dipropylene glycol methyl ether and polyvinylpyrrolidone, and the mass ratio of the dipropylene glycol methyl ether to the polyvinylpyrrolidone is 1.3:1.
in this embodiment, the mineral salts are calcium chloride and ferrous sulfate, and the mass ratio of the calcium chloride to the ferrous sulfate is 1:1.2.
in this embodiment, the preparation steps of the compound modified mesoporous tin dioxide include the following steps: respectively weighing 0.3 part of stannic chloride pentahydrate, 1.5 parts of urea and 0.8 part of polyvinylpyrrolidone (1) by weight, adding into 30 parts of methanol, and stirring until the materials are completely dissolved; (2) reacting the solution at 185 ℃ for 8.5 hours; (3) After the reaction is finished, drying the precipitate, and calcining the precipitate in a muffle furnace at 550 ℃ for 1.5 hours to obtain mesoporous tin dioxide; (4) Then 1 part of mesoporous tin dioxide is added into 30 parts of DMF solution containing 15 parts of succinic anhydride and 8 parts of 3-aminopropyltriethoxysilane, and the mixture is heated for 2.5 hours at the temperature of 60 ℃; (5) And after the reaction is finished, filtering and drying, adding the product into a mixed 50 parts methanol solution containing 15 parts of dimethyl imidazole and 8 parts of zinc nitrate, and heating and carrying out ultrasonic reaction for 3 hours at 80 ℃ to obtain the compound modified mesoporous tin dioxide.
The average particle size of the prepared mesoporous tin dioxide is 180nm.
In this embodiment, the polyvinylpyrrolidone is a polyvinylpyrrolidone model K30 product sold by junan honor chemical limited.
In this embodiment, the polyacrylamide emulsion is a polyacrylamide emulsion product sold by Kaifeng water purification materials, inc. of Henan.
In this example, the acrylate emulsion was an acrylate emulsion product sold by Okay materials Co.Ltd.
In this example, 3-aminopropyltriethoxysilane CAS:919-30-2 and succinic anhydride CAS:108-30-5.
Example 2
The embodiment of the present invention is different from embodiment 1 in that: in the preparation process of the compound modified mesoporous tin dioxide, 0.5 part of stannic chloride pentahydrate, 1.6 parts of urea and 1 part of polyvinylpyrrolidone are used, the reaction time is 9 hours at a high temperature of 185 ℃, and the average particle size of the obtained mesoporous tin dioxide is 200nm.
Example 3
The embodiment of the present invention is different from embodiment 1 in that: the content of the polymer emulsion was 20% and the content of the mineral salt was 35%.
Comparative example 1
The embodiment of this comparative example is the same as example 1 except that: the content of the polymer emulsion was 10% and the content of the mineral salt was 35%.
Comparative example 2
The embodiment of this comparative example is the same as example 1 except that: the mesoporous tin dioxide is directly adopted, and the compound modification is not carried out.
Comparative example 3
The embodiment of this comparative example is the same as example 1 except that: in the preparation process of the compound modified mesoporous tin dioxide, 0.8 part of stannic chloride pentahydrate, 2 parts of urea, 1 part of polyvinylpyrrolidone and 15 hours of reaction at 185 ℃ at high temperature are adopted, and the average particle size of the obtained mesoporous tin dioxide is 350nm.
Evaluation of Performance
1. The formaldehyde removal effect is as follows: the wall glaze prepared in each example and comparative example was coated on a glass slide of 20mm × 90mm, dried and placed in a sealed 4000mL container, formaldehyde gas was injected into the sealed container at a concentration of 50mL/L, the formaldehyde content was measured with reference to GB/T15516-1955 every day for 5 days, the formaldehyde removal efficiency was calculated, 5 samples were measured in each example comparative example, and the average value of the measured values is shown in table 1.
2. And (3) testing the hydrophilicity and the hydrophobicity: the wall glaze prepared in all the examples and comparative examples was sprayed to obtain a 30 ± 4 μm film by a spraying method known to those skilled in the art, the prepared film was tested for hydrophilic contact angle by a sessile drop method water contact angle tester, 5 samples were tested for each example, and the average value of the results is shown in table 1.
3. Yellowing test: the wall glaze prepared in all the examples and comparative examples is sprayed into a film layer with the thickness of 30 +/-4 microns by adopting a spraying mode well known to those skilled in the art, and the film layer is respectively placed at the ambient temperature of 32 ℃ and is subjected to an outdoor illumination experiment with sufficient illumination, the illumination is carried out for 8 hours every day and is continuously carried out for 365 days, and whether obvious cracks and yellowing phenomena exist or not is observed.
TABLE 1
| Examples | Percent removal of formaldehyde | Water contact angle ° | Yellowing resistance under illumination |
| Example 1 | 93.1 | 114.5 | No obvious crack yellowing |
| Example 2 | 92.5 | 112.7 | No obvious crack yellowing |
| Example 3 | 92.4 | 113.4 | No obvious crack yellowing |
| Comparative example 1 | 81.2 | 94.1 | Cracking and yellowing |
| Comparative example 2 | 84.7 | 87.4 | Slight yellowing with cracks |
| Comparative example 3 | 84.1 | 95.2 | Cracking and yellowing |
Through the examples 1-3, the comparative examples 1-3 and the table 1, it can be known that the environment-friendly mineral wall glaze for interior and exterior buildings and the preparation method thereof provided by the invention have good waterproof property, water washing resistance and gas removal effect, effectively reduce the phenomenon of light yellowing, are suitable for popularization in the field of wall glaze paint, and have wide development prospects. In example 1, the optimal performance index is obtained under the conditions of optimal raw material proportion, optimal preparation process and the like.
Finally, it should be understood that the above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The environment-friendly mineral wall glaze for the interior and exterior of buildings is characterized in that: the raw materials at least comprise the following components in percentage by mass: 10-17.25% of polymer emulsion, 4-6% of film-forming additive, 25-32.5% of mineral salt, 5-10% of metal oxide nano particles and the balance of deionized water;
the mass ratio of the polymer emulsion to the mineral salt is 3 to 4:6 to 7;
the polymer emulsion is polyacrylamide emulsion and acrylate emulsion;
the mass ratio of the polyacrylamide emulsion to the acrylate emulsion is 6 to 7:2 to 3;
the mineral salts are calcium chloride and ferrous sulfate;
the metal oxide nano particles are compound modified mesoporous tin dioxide;
the average particle size of the mesoporous tin dioxide is 150 to 200nm;
the preparation steps of the compound modified mesoporous tin dioxide comprise the following steps: (1) Respectively weighing stannic chloride pentahydrate, urea and polyvinylpyrrolidone, adding into methanol, and stirring until the materials are completely dissolved; (2) reacting the solution at a high temperature of 180 to 190 ℃ for 8 to 10 hours; (3) After the reaction is finished, drying the precipitate, and calcining the precipitate in a muffle furnace at 550 ℃ for 1.5 hours to obtain mesoporous tin dioxide; (4) Then adding the mesoporous tin dioxide into a DMF (dimethyl formamide) solution containing succinic anhydride and 3-aminopropyltriethoxysilane, and heating for 2 to 4 hours at 60 to 65 ℃; (5) And after the reaction is finished, filtering and drying, adding the product into a mixed methanol solution containing dimethyl imidazole and zinc nitrate, and heating and carrying out ultrasonic reaction for 2-4 hours at the temperature of 60-80 ℃ to obtain the compound modified mesoporous tin dioxide.
2. The environment-friendly mineral wall glaze for interior and exterior buildings according to claim 1, which is characterized in that: the film-forming assistant is at least one of glycol dodecate, polyvinylpyrrolidone, dipropylene glycol methyl ether, dipropylene glycol butyl ether, dipropylene glycol phenyl ether and polyurethane.
3. The environment-friendly mineral wall glaze for interior and exterior buildings as claimed in any one of claims 1 to 2, wherein: the mass ratio of the metal oxide nanoparticles to the film-forming assistant is 6 to 9:5 to 5.5.
4. A preparation method of the environment-friendly mineral wall glaze for the interior and the exterior of the building according to any one of claims 1 to 3, which is characterized by comprising the following steps: the method comprises the following steps: (1) Sequentially adding deionized water, polymer emulsion and mineral salt into a stirring kettle, and stirring at 1200-1400 rpm for 60-90 minutes; (2) After stirring, adding the metal oxide nanoparticles and the film-forming auxiliary agent, and stirring for 60 to 80 minutes at 500 to 800rpm; (3) After stirring, heating to 50-60 ℃, keeping the temperature for 60-100 minutes, cooling and canning to obtain the product.
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| WO2014186210A2 (en) * | 2013-05-13 | 2014-11-20 | University Of Connecticut | Mesoporous materials and processes preparation thereof |
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| CN111039646A (en) * | 2019-12-13 | 2020-04-21 | 罗翠莲 | Mineral substance nanometer wall glaze capable of purifying air for inner and outer walls of building |
| CN111019470A (en) * | 2019-12-13 | 2020-04-17 | 罗翠莲 | Novel environment-friendly anti-corrosion wall glaze for interior and exterior wall decoration and preparation method thereof |
| CN113845812A (en) * | 2021-07-05 | 2021-12-28 | 罗翠莲 | Environment-friendly heat-insulation wall glaze and preparation method thereof |
| CN113845785A (en) * | 2021-07-06 | 2021-12-28 | 罗翠莲 | Light-resistant and water-resistant building interior and exterior wall glaze and preparation method thereof |
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| WO2014186210A2 (en) * | 2013-05-13 | 2014-11-20 | University Of Connecticut | Mesoporous materials and processes preparation thereof |
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