Sound insulation coating containing graphene oxide modified vermiculite and preparation method thereof

Abstract

The invention relates to the technical field of building coatings, and discloses a graphene oxide modified vermiculite-containing sound insulation coating, which comprises the following components by mass: 0.5% of a dispersant; 0.2% of a defoaming agent; 2-8% of graphene oxide modified vermiculite powder; 10.6% of ethylene propylene diene monomer powder; 1% of aerogel; 1.2% of bentonite; 1.04% of cellulose ether; 0.7% of a directional agent; 0.3% of ammonia water; 1.2% of ethylene glycol; 1.5% of 12 alcohol ester; 0.1% of a bactericide; 28% of a core-shell emulsion; and the balance of pure water. The graphene oxide modified vermiculite powder is added into the coating, so that the sound insulation effect is effectively improved, the use thickness of the coating is reduced, and the preparation process is simple and easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of architectural coatings, in particular to a sound insulation coating containing graphene oxide-modified vermiculite and a preparation method thereof. Background Art

[0002] Traditional soundproofing materials typically consist of cement concrete and glass panels. These materials often require significant thickness to effectively reduce noise, leading to inconvenience in both use and construction. For example, if soundproofing an existing project requires retrofitting, the bulky soundproofing materials not only create construction difficulties and reduce the usable space, but also negatively impact the exterior appearance of the renovation. It's precisely in this context, with the development of the coatings industry, that soundproofing coatings have emerged.

[0003] Existing sound-insulating coatings primarily utilize nanostructured multilayer materials, sandwiching environmentally friendly water-based coating molecules. Sound-insulating microparticles are evenly distributed throughout the interlayer, reducing the energy of projected sound waves and thus providing sound insulation. However, according to GB 50121-2005, existing sound-insulating coatings only achieve a performance rating of Class 1-2 (Ln,w > 65dB) for impact sound insulation, resulting in suboptimal sound insulation. Furthermore, the application thickness of sound-insulating coatings is much greater than that of standard sand-and-mortar coatings, making their application more difficult.

[0004] Chinese Patent 110746885A discloses a sound-insulating, weather-resistant, and waterproof coating and its preparation method. The coating is made from the following ingredients in parts by weight: 40-50 parts of an ionically modified 3-nitrobenzene boric acid L-tartrate / 2,6-diaminopurine polycondensate, 3-5 parts of one-dimensional hollow porous calcium titanate nanofibers, 10-20 parts of perlite, 10-20 parts of vermiculite, 1-3 parts of polypyrrole nanofibers, 20-30 parts of carboxyl-terminated liquid fluororubber, 1-3 parts of a dispersant, 5-8 parts of an emulsifier, 1-3 parts of a coupling agent, 10-15 parts of an organic solvent, and 25-35 parts of water. The key sound-insulating materials are often modified rubber particles or fibers, resulting in a complex modification process. The preparation of the sound-insulating coating requires high temperatures and pressures, making it difficult to scale up production.

[0005] Therefore, there is an urgent need to develop a sound insulation coating containing graphene oxide modified vermiculite and a preparation method thereof, which can effectively improve the sound insulation effect and reduce the thickness of the coating. The preparation process is simple and easy to operate. Summary of the Invention

[0006] To address the above-mentioned issues, the present invention aims to provide a sound-insulating coating containing graphene oxide-modified vermiculite and a method for its preparation. The coating incorporates graphene oxide-modified vermiculite powder, is applied by spraying, and has a thickness of 1 cm. According to GB / T 19889.7-2005, the weighted normalized impact sound pressure level (L'nT) is 62.9 dB. This invention effectively improves sound insulation while reducing coating thickness. The preparation process is simple and easy to operate.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] A sound insulation coating containing graphene oxide-modified vermiculite, comprising the following components in percentage by mass:

[0009]

[0010]

[0011] Preferably, the graphene oxide modified vermiculite powder is prepared by the following steps:

[0012] (1) uniformly dispersing graphene oxide powder in ethylene glycol by ultrasonication to obtain a graphene oxide dispersion;

[0013] (2) adding the ground vermiculite powder, graphene oxide dispersion, hexadecyltrimethylammonium bromide, pure water, and hydrazine hydrate into a reactor, reacting at 85° C. for 12 h, and filtering the mixture. The filtrate was dried and passed through a 100-mesh sieve to obtain graphene oxide-modified vermiculite powder;

[0014] The mass ratio of the graphene oxide powder to ethylene glycol is 1:1; the mass ratio of the vermiculite powder to the graphene oxide powder is 20:1; the amount of cetyltrimethylammonium bromide is 0.2% of the weight of the vermiculite; the amount of pure water is twice the weight of the vermiculite powder; and the mass ratio of the vermiculite powder to hydrazine hydrate is 100:(1-1.5).

[0015] Preferably, the specific surface area of ​​the graphene oxide powder is 300m 2 / g, SEM test 5-8 layers.

[0016] Preferably, the particle size of the ground vermiculite powder is 100-150 μm.

[0017] Preferably, the dispersant is a hydrophobically modified copolymer ammonia salt dispersant, such as Coatech P30, San Nopco SN-5027, COATECH FS150, and the like.

[0018] Preferably, the defoaming agent is an organosilicon defoaming agent, such as FOAMASTER MO NXZ AG.

[0019] Preferably, the EPDM rubber powder has a mesh size of 40-80.

[0020] Preferably, the aerosol is silica powder with a specific surface area of ​​110±20m 2 / g.

[0021] Preferably, the ammonia water is 9 wt % ammonia water.

[0022] Preferably, the bentonite is DY-P20, with a hardness of 1-2 and a density of 2-3 / cm 3 .

[0023] Preferably, the directing agent is V-450, which is a composite of organic-modified nano-sheet silicate, has excellent anti-sagging and thixotropy, and a pH value of 7.0-10.0.

[0024] Preferably, the fungicide is a benzisothiazolinone (BIT)-containing fungicide, such as Lanxess P520W.

[0025] Preferably, the core-shell emulsion is 838A-5 emulsion, and the glass transition temperature is 30°C.

[0026] Another object of the present invention is to provide a method for preparing the above-mentioned sound insulation coating containing graphene oxide modified vermiculite, comprising the following steps:

[0027] (1) Start stirring, control the speed to 500 rpm / min, add dispersant, defoamer, graphene oxide modified vermiculite powder, aerogel, and EPDM rubber powder into pure water in sequence, and disperse for 10 minutes;

[0028] (2) Then, add cellulose ether, bentonite, directing agent and ammonia water, increase the speed to 1300 rpm / min, and disperse for 10 minutes;

[0029] (3) Then stop stirring and add the core-shell emulsion. After the emulsion is added, increase the stirring speed to 900 rpm / min, continue to add ethylene glycol, alcohol ester twelve, and fungicide, and then stir for 5 minutes to obtain the sound insulation coating.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention combines the multilayer structure of graphene oxide and the porous structure of vermiculite material to increase the specific surface area of ​​the material. When sound contacts the sound insulation coating, the multilayer porous structure of the material converts kinetic energy into heat energy for consumption, thereby effectively improving the sound insulation effect and reducing the thickness of the coating.

[0032] The present invention adds graphene oxide modified vermiculite powder to the coating, the coating is applied by spraying, the coating thickness is 1 cm, and the weighted standardized impact sound pressure level L'nT tested according to GB / T 19889.7-2005 is 62.9 dB.

[0033] The preparation method of the present invention is simple and easy to operate, does not require a high temperature and high pressure environment, and is conducive to expanding production. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with specific embodiments, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents and instruments used in the examples are all conventional products that can be obtained commercially. The experimental methods used in the examples, unless otherwise specified, are all conventional experimental methods or technical means in the art.

[0035] Examples 1-3 of the present invention provide a sound insulation coating containing graphene oxide modified vermiculite, and the components are expressed in percentage by mass as shown in Table 1 below:

[0036] Table 1: Formula of Examples 1-3

[0037]

[0038]

[0039] Graphene oxide modified vermiculite powder is prepared by the following steps:

[0040] (1) uniformly dispersing graphene oxide powder in ethylene glycol by ultrasonication to obtain a graphene oxide dispersion;

[0041] (2) adding the ground vermiculite powder, graphene oxide dispersion, hexadecyltrimethylammonium bromide, pure water, and hydrazine hydrate into a reactor, reacting at 85° C. for 12 h, and filtering the mixture. The filtrate was dried and passed through a 100-mesh sieve to obtain graphene oxide-modified vermiculite powder;

[0042] The mass ratio of the graphene oxide powder to ethylene glycol is 1:1; the mass ratio of the vermiculite powder to the graphene oxide powder is 20:1; the amount of cetyltrimethylammonium bromide is 0.2% of the weight of the vermiculite; the amount of pure water is twice the weight of the vermiculite powder; and the mass ratio of the vermiculite powder to hydrazine hydrate is 100:(1-1.5).

[0043] In Examples 1-3, graphene oxide-modified vermiculite powder was prepared by the following steps:

[0044] (1) 50 g of graphene oxide powder was ultrasonically dispersed in 50 g of ethylene glycol for 30 min to obtain a 50% wt graphene oxide dispersion;

[0045] (2) 100 g of ground vermiculite powder, 10 g of graphene oxide dispersion, 0.2 g of hexadecyltrimethylammonium bromide, 200 g of pure water, and 1 g of hydrazine hydrate were reacted in a reactor at 85 ° C for 12 h and then filtered. The filtrate was dried and passed through a 100 mesh sieve to obtain graphene oxide-modified vermiculite powder.

[0046] Among them, the specific surface area of ​​graphene oxide powder is 300m 2 / g, SEM test 5-8 layers. The particle size of the ground vermiculite powder is 100-150μm.

[0047] In the embodiment, the dispersant is a hydrophobically modified copolymer ammonia salt dispersant, such as Coatech P30, San Nopco SN-5027, COATECH FS150, etc. The defoamer is a silicone defoamer, such as FOAMASTER MO NXZ AG, etc. The EPDM rubber powder is 40-80 mesh. The aerosolizing agent is silica powder with a specific surface area of ​​110±20 m 2 / g. Bentonite is DY-P20, hardness 1-2, density 2-3 / cm 3 The directing agent is V-450, a synthetic organic-modified nano-sheet silicate with excellent sag resistance and thixotropy, with a pH of 7.0-10.0. The ammonia solution is 9 wt% ammonia. The fungicide is P520W. The core-shell emulsion is 838A-5 emulsion, with a glass transition temperature of 30°C.

[0048] The preparation method of the sound insulation coating of the above-mentioned embodiments 1-3 comprises the following steps:

[0049] (1) Start stirring, control the speed to 500 rpm / min, add dispersant, defoamer, graphene oxide modified vermiculite powder, aerogel, and EPDM rubber powder into pure water in sequence, and disperse for 10 minutes;

[0050] (2) Then, add cellulose ether, bentonite, directing agent and ammonia water, increase the speed to 1300 rpm / min, and disperse for 10 minutes;

[0051] (3) Then stop stirring and add the core-shell emulsion. After the emulsion is added, increase the stirring speed to 900 rpm / min, continue to add ethylene glycol, alcohol ester twelve, and fungicide, and then stir for 5 minutes to obtain the sound insulation coating.

[0052] The sound insulation coatings prepared in Examples 1-3 were spray-coated with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 2 below:

[0053] Table 2 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0054]

[0055] The sound insulation coatings prepared in Examples 1-3 were spray-coated with a thickness of 3 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 3 below:

[0056] Table 3 Weighted standardized impact sound pressure level of coating with a thickness of 3 cm

[0057]

[0058] The sound insulation coatings prepared in Examples 1-3 were spray-coated with a thickness of 5 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 4 below:

[0059] Table 4 Weighted standardized impact sound pressure level of coating with a thickness of 5 cm

[0060]

[0061] During the preparation of graphene oxide modified vermiculite powder, the reaction temperature and the amount of hydrazine hydrate added have an impact on the sound insulation effect of the product graphene oxide modified vermiculite powder.

[0062] The formulations of the sound insulation coatings of Comparative Examples 1-3 were the same as those of Examples 1-3, respectively. The preparation method of the graphene oxide-modified vermiculite powder therein was the same as that of the graphene oxide-modified vermiculite powder in Examples 1-3, except that the reaction temperature was 90°C. The preparation methods of the sound insulation coatings of Comparative Examples 1-3 were the same as those of Examples 1-3.

[0063] The sound insulation coatings prepared in Comparative Examples 1-3 were spray-coated with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 5 below:

[0064] Table 5 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0065]

[0066] The sound insulation coatings prepared in Comparative Examples 1-3 were spray-applied with a thickness of 3 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 6 below:

[0067] Table 6 Weighted standardized impact sound pressure level of coating with a thickness of 3 cm

[0068]

[0069] The formulations of the sound insulation coatings of Comparative Examples 4-6 were the same as those of Examples 1-3, respectively. The preparation methods of the graphene oxide-modified vermiculite powder therein were the same as those of Examples 1-3, except that the reaction temperature was 80°C. The preparation methods of the sound insulation coatings of Comparative Examples 4-6 were the same as those of Examples 1-3.

[0070] The sound insulation coatings prepared in Comparative Examples 4-6 were spray-applied with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 7 below:

[0071] Table 7 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0072]

[0073] It can be seen from Examples 1-3 and Comparative Examples 1-6 that in the preparation process of graphene oxide modified vermiculite powder, too high or too low reaction temperature affects the sound insulation effect of the product graphene oxide modified vermiculite powder. When the reaction temperature is 85°C, the sound insulation effect of the product is the best.

[0074] The formulations of the sound-insulating coatings of Comparative Examples 7-9 were identical to those of Examples 1-3, respectively. The preparation methods of the graphene oxide-modified vermiculite powder therein were identical to those of Examples 1-3, except that the amount of hydrazine hydrate added was 0.5 g. The preparation methods of the sound-insulating coatings of Comparative Examples 7-9 were the same as those of Examples 1-3.

[0075] The sound insulation coatings prepared in Comparative Examples 7-9 were spray-applied with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 8 below:

[0076] Table 8 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0077]

[0078] The sound insulation coatings prepared in Comparative Examples 7-9 were spray-applied with a thickness of 3 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 9 below:

[0079] Table 9 Weighted standardized impact sound pressure level of coating with a thickness of 3 cm

[0080]

[0081] The formulations of the sound-insulating coatings for Comparative Examples 10-12 were identical to those of Examples 1-3, respectively. The preparation methods for the graphene oxide-modified vermiculite powder therein were identical to those for Examples 1-3, except that the amount of hydrazine hydrate added was 1.5 g. The preparation methods for the sound-insulating coatings for Comparative Examples 10-12 were the same as those for Examples 1-3.

[0082] The sound insulation coatings prepared in Comparative Examples 10-12 were spray-applied with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 10 below:

[0083] Table 10 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0084]

[0085] From Examples 1-3 and Comparative Examples 7-12, it can be seen that in the preparation process of graphene oxide modified vermiculite powder, the amount of hydrazine hydrate added has an impact on the sound insulation effect of the product graphene oxide modified vermiculite powder. When the mass ratio of vermiculite powder to hydrazine hydrate is 100:(1-1.5), the sound insulation effect of the product is the best. Considering that an increase in the amount of hydrazine hydrate will lead to increased costs, it is best when the mass ratio of vermiculite powder to hydrazine hydrate is 100:1.

[0086] To illustrate the sound insulation effect of graphene oxide-modified vermiculite powder before and after modification, Comparative Examples 13-15 used graphene oxide powder, vermiculite powder, and a physical mixture of graphene oxide powder and vermiculite powder to replace the graphene oxide-modified vermiculite powder in Example 2, respectively. Other components were the same as in Example 2. The graphene oxide powder, vermiculite powder, and graphene oxide-modified vermiculite powder in Comparative Examples 13-15 were the same as those used in the preparation process.

[0087] The details are shown in Table 11:

[0088] Table 11 Formula table of comparative examples 13-15

[0089]

[0090]

[0091] The preparation method of the sound insulation coating of Comparative Examples 13-15 is the same as that of Examples 1-3.

[0092] The sound insulation coatings prepared in Comparative Examples 13-15 were spray-applied with a thickness of 1 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 12 below:

[0093] Table 12 Weighted standardized impact sound pressure level of coating with a thickness of 1 cm

[0094]

[0095] The sound insulation coatings prepared in Comparative Examples 13-15 were spray-applied with a thickness of 3 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 13 below:

[0096] Table 13 Weighted standardized impact sound pressure level of coating with a thickness of 3 cm

[0097]

[0098] The sound insulation coatings prepared in Comparative Examples 13-15 were spray-applied with a thickness of 5 cm. The weighted standardized impact sound pressure levels tested according to GB / T 19889.7-2005 are shown in Table 14 below:

[0099] Table 14 Weighted standardized impact sound pressure level of coating with a thickness of 5 cm

[0100]

[0101] Comparing Example 2 with Comparative Examples 13-15, it can be seen that while conventional graphene oxide powder and vermiculite powder, used alone or in a physical mixture, can achieve a certain sound insulation effect, the sound insulation effect is poor. Moreover, the application thickness of the sound insulation coating is much greater than that of normal sand-glue coating, which increases the construction difficulty. Example 2 uses graphene oxide-modified vermiculite powder, combining the multilayer structure of graphene oxide with the porous structure of vermiculite material, increasing the specific surface area of ​​the material, effectively improving the sound insulation effect, and reducing the coating thickness.

[0102] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A sound insulation coating containing graphene oxide modified vermiculite, characterized in that: It includes the following components in percentage by mass:

2. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The graphene oxide modified vermiculite powder is prepared by the following steps: (1) uniformly dispersing graphene oxide powder in ethylene glycol by ultrasonication to obtain a graphene oxide dispersion; (2) adding the ground vermiculite powder, graphene oxide dispersion, hexadecyltrimethylammonium bromide, pure water, and hydrazine hydrate into a reactor, reacting at 85° C. for 12 h, and filtering the mixture. The filtrate was dried and passed through a 100-mesh sieve to obtain graphene oxide-modified vermiculite powder; The mass ratio of the graphene oxide powder to ethylene glycol is 1:1; the mass ratio of the vermiculite powder to the graphene oxide powder is 20:1; the amount of cetyltrimethylammonium bromide is 0.2% of the weight of the vermiculite; the amount of pure water is twice the weight of the vermiculite powder; and the mass ratio of the vermiculite powder to hydrazine hydrate is 100:(1-1.5).

3. The sound insulation coating containing graphene oxide modified vermiculite according to claim 2, characterized in that: The specific surface area of ​​the graphene oxide powder is 300m 2 / g, SEM test 5-8 layers.

4. The sound insulation coating containing graphene oxide modified vermiculite according to claim 2, characterized in that: The particle size of the ground vermiculite powder is 100-150 μm.

5. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The dispersant is a hydrophobically modified copolymer ammonia salt dispersant; the defoamer is an organic silicon defoamer; and the EPDM rubber powder has a mesh size of 40-80.

6. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The aerogel is silicon dioxide powder; the specific surface area is 110±20m 2 / g.

7. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The ammonia water is 9 wt % ammonia water.

8. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The fungicide is a benzisothiazolinone (BIT) type fungicide.

9. The sound insulation coating containing graphene oxide modified vermiculite according to claim 1, characterized in that: The bentonite is DY-P20, the directing agent is V-450, and the core-shell emulsion is 838A-5 emulsion.

10. A method for preparing a sound insulation coating containing graphene oxide modified vermiculite according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Start stirring, control the speed to 500 rpm / min, add dispersant, defoamer, graphene oxide modified vermiculite powder, aerogel, and EPDM rubber powder into pure water in sequence, and disperse for 10 minutes; (2) Then, add cellulose ether, bentonite, directing agent and ammonia water, increase the speed to 1300 rpm / min, and disperse for 10 minutes; (3) Then stop stirring and add the core-shell emulsion. After the emulsion is added, increase the stirring speed to 900 rpm / min, continue to add ethylene glycol, alcohol ester twelve, and fungicide, and then stir for 5 minutes to obtain the sound insulation coating.

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