CN115073139B - Preparation method of antibacterial two-stage micropore sound-insulation inner wall brick - Google Patents

Abstract

The invention discloses a preparation method of an antibacterial two-stage micropore sound insulation inner wall brick, which comprises the following steps: adding superfine quartz fiber powder, a high molecular polymer and a dispersing agent into a solvent, uniformly stirring, drying, grinding and sieving to obtain quartz fiber microspheres; placing diatomite in an antibacterial agent, stirring at room temperature in a dark place, then placing in a vacuum environment in a dark place for soaking, washing, filtering and drying to obtain antibacterial diatomite; stirring and mixing the quartz fiber microspheres, the antibacterial diatomite and the mixed slurry to obtain single-stage micropore sound-insulating inner wall brick slurry, then sending the slurry into a hydraulic brick press for press molding, and sintering after drying to obtain the antibacterial two-stage micropore sound-insulating inner wall brick. The double-stage micropore sound insulation inner wall brick can realize integral sound absorption and sound insulation, and the sound wave is beneficial to the release of antibacterial ions in the antibacterial diatomite, so that the double-stage micropore sound insulation inner wall brick has wide prospects in the fields of actual building home decoration and the like.

Description

Preparation method of antibacterial two-stage micropore sound-insulation inner wall brick

Technical Field

The invention belongs to the technical field of building material preparation, and particularly relates to a preparation method of an antibacterial two-stage micropore sound insulation inner wall brick.

Background

With the acceleration of the urbanization process, the urban land resources are more and more strained, and high-rise residences become the trend of urban development. Due to the scarcity of land, the problems of main streets, viaducts and noise of some high-rise residences always troubles the residents. In addition, the shortage of land resources also causes the problems of undersized building spacing, crowded house types and the like, so that the indoor ventilation effect is poor, and bacteria are easy to breed. The indoor noise reduction can be realized by installing sound insulation boards on the outer wall and the inner wall of the building, but the thickness of the wall body of the high-rise building is increased, and the indoor usable area is reduced. This problem is improved by using the sound insulating interior wall tiles directly.

At present, most of the structures of the inner wall bricks are hollow, stacked layer by layer or integrated, the sound insulation effect of the hollow bricks is determined by sound insulation materials filled in the hollow structures, but in order to ensure the compressive strength of the brick bodies, the weight of the brick bodies can be reduced by a limited amount, so that the filled sound insulation materials are limited; the interlayer binding force of the stacked brick bodies is insufficient and the sound insulation effect is influenced by the thickness of the sound insulation layer. The sound insulation effect of the integrated sound insulation brick is provided by the resonance sound absorption of pores or fibrous fillers in the brick body. The pores are generally generated by a foaming agent in the brick body slurry, and the compressive strength of the brick body is reduced due to the larger pores; the fibrous filler is generally mixed in the brick body slurry, is easy to be wrapped by mixed materials and is not easy to generate resonance. Therefore, the design of the microporous sound-insulation inner wall brick with an antibacterial function and capable of absorbing sound and insulating sound integrally is very important.

A Chinese patent 'porous light anti-seismic sound-insulating brick' (application number: 202023103218.X, grant number: CN215759962U, published as 2022.02.08) discloses a porous light sound-insulating anti-seismic sound-insulating brick, wherein a hollow structure formed by a plurality of hollow cylinders is arranged inside a brick body, and sound-insulating cotton is filled in the hollow cylinders. The hollow structure reduces the weight of the brick body, saves materials, but takes the compression resistance of the brick body into consideration, the hollow structure in the brick body is limited, only a little soundproof cotton can be filled, and the soundproof performance of the brick body is limited.

The Chinese patent application No. 202022879498.7, no. CN213979542U, published as 2021.08.17 discloses a heat-proof and sound-insulating brick for high-rise building, its brick body is formed from upper brick body, lower brick body and intermediate layer, and the upper and lower brick bodies are equipped with perforated hole channels, so that the sound-insulating property of said brick body can be raised, but the number of perforated holes and length of said hole channels are limited by said brick body.

Chinese patent "manufacturing process of a light sound insulation wall brick" (application number: 202110351308.0, publication number: CN113121141A, bulletin day: 2021.07.16) discloses a preparation process of a light sound insulation wall brick, which achieves sound insulation effect by mixing gypsum whiskers in a wall brick raw material, but the gypsum whiskers are wrapped by other mixed materials and confined in the mixed materials, are difficult to resonate with air, and limit the improvement of the sound insulation performance.

Chinese patent application No. 202011471757.0, publication No. CN112573899A, bulletin No. 2021.03.30 discloses a low-frequency sound-insulating brick and a preparation method thereof, wherein polystyrene particles are added into mixed slurry, and a macroporous brick blank is obtained after high-temperature sintering. But the polystyrene particles are not uniformly dispersed in the mixed slurry, so that the holes in the green brick are not communicated with each other, the cavity resonance can only occur on the surface of the brick, and the utilization rate of the sound-insulating brick is reduced.

Disclosure of Invention

The invention aims to provide a preparation method of an antibacterial two-stage micropore sound insulation inner wall brick, and solves the problems that the inner wall brick in the prior art cannot realize integral sound insulation and the structural utilization rate of a brick body is low.

The invention adopts the technical scheme that the preparation method of the antibacterial two-stage micropore sound insulation inner wall brick is implemented according to the following steps:

step 1, preparing quartz fiber microspheres;

adding superfine quartz fiber powder, a high molecular polymer and a dispersing agent into a solvent, uniformly stirring to obtain a mixed solution, drying, grinding and sieving to obtain quartz fiber microspheres;

step 2, performing ion exchange to obtain antibacterial diatomite;

placing diatomite in an antibacterial agent, stirring at room temperature in a dark place, placing in a vacuum environment in a dark place for soaking, washing with deionized water, filtering, and drying to obtain antibacterial diatomite;

step 3, preparing single-stage micropore sound insulation inner wall brick slurry;

stirring and mixing the quartz fiber microspheres obtained in the step 1, the antibacterial diatomite obtained in the step 2 and the mixed slurry for 2-3 hours at room temperature to obtain single-stage micropore sound insulation inner wall brick slurry;

and 4, sintering at high temperature to obtain the double-stage micropore sound insulation inner wall brick.

The present invention is also characterized in that,

in the step 1, the mixed solution comprises the following components in percentage by mass: 18 to 24 percent of superfine quartz fiber, 1.2 to 2.4 percent of high molecular polymer, 0.9 to 1.2 percent of dispersant, 72.4 to 79.9 percent of solvent, and the total mass of the components is 100 percent.

In the step 1, the diameter of the protofilament of the superfine glass fiber powder is 5-10 μm, and the average fiber length is 50-100 μm; the drying temperature is 60-80 ℃, and the drying time is 12-24 h.

In the step 1, the high molecular polymer is any one of wholly aromatic polyimide, bismaleimide and cyanate resin; the dispersant is any one of silane coupling agents KH-550, KH-560 and KH-570; the solvent is any one of N, N-dimethylformamide, acetone, tetrahydrofuran and chloroform.

In the step 2, the antibacterial agent is any one of silver nitrate solution, copper chloride solution and zinc sulfate solution; the concentration of the antibacterial agent is 0.05mol/L-0.2mol/L.

In the step 2, the light-resistant stirring time is 2h-3h, the light-resistant dipping time is 1h-2h, and the drying temperature is 60-80 ℃; the drying time is 12-24 h.

In the step 3, the single-stage micropore sound insulation inner wall brick slurry comprises the following components in percentage by mass: 18-23% of quartz fiber microspheres, 15-20% of bacterial diatomite and 57-67% of mixed slurry, wherein the total mass of the components is 100%.

The mixed slurry comprises the following components in percentage by mass: 12 to 15 percent of coal gangue mine, 20 to 23 percent of clay, 5 to 7 percent of calcium carbonate, 1 to 4 percent of magnesium silicate, 3 to 6 percent of calcium silicate, 1 to 5 percent of sodium silicate and 40 to 58 percent of hard water, wherein the total mass of the components is 100 percent.

In step 4, the method specifically comprises the following steps:

and (3) feeding the slurry of the single-stage microporous sound-insulating inner wall brick obtained in the step (3) into a hydraulic brick press, making a blank under the pressure of 1.5-2.5 MPa under the condition that the flow rate of the slurry is 20%, maintaining the pressure for 25s, drying at 100-150 ℃ for 1-2 h, transferring the blank to a high-temperature sintering furnace, and sintering at 1050-1100 ℃ for 1.5-2 h to obtain the antibacterial two-stage microporous sound-insulating inner wall brick.

The invention has the beneficial effects that: the invention relates to a preparation method of an antibacterial two-stage micropore sound-insulation inner wall brick. When sound waves are transmitted to the inner wall brick, three paths of sound dissipation are provided: firstly, the quartz fiber generates vibration deformation and simultaneously drives the whole quartz fiber framework to generate vibration, and acoustic energy is dissipated by transferring energy. Second, the acoustic wave generates viscous losses through the pores formed by the staggered distribution of the quartz fibers, and is dissipated by converting the acoustic energy into thermal energy. Thirdly, a large amount of antibacterial diatomite is distributed around the quartz fiber framework, and sound energy is dissipated by viscous friction and cavity resonance generated when sound waves pass through micropores on the surface of the quartz fiber framework. Therefore, the double-stage micropore sound insulation inner wall brick can realize integral sound absorption and sound insulation, and the sound wave is favorable for releasing antibacterial ions in the antibacterial diatomite.

Drawings

Fig. 1 is a schematic structural view of a double-stage microporous sound-insulating inner wall brick prepared by the method of the present invention.

In the figure, 1, a brick body, 2, antibacterial diatomite, 3, a quartz fiber framework and 4, raw materials except the antibacterial diatomite and the quartz fiber framework are adopted.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention relates to a preparation method of an antibacterial two-stage micropore sound insulation inner wall brick, which is implemented according to the following steps:

step 1, preparing quartz fiber microspheres;

adding a certain amount of superfine quartz fiber powder, a high molecular polymer and a dispersing agent into a solvent, uniformly stirring to obtain a mixed solution, drying at the temperature of 60-80 ℃ for 12-24 h, and grinding and sieving with at least 80-mesh sieves to obtain quartz fiber microspheres;

the mixed solution comprises the following components in percentage by mass: 18 to 24 percent of superfine quartz fiber, 1.2 to 2.4 percent of high molecular polymer, 0.9 to 1.2 percent of dispersant and 72.4 to 79.9 percent of solvent, wherein the total mass of the components is 100 percent;

the diameter of the protofilament of the superfine glass fiber powder is 5-10 mu m, and the average fiber length is 50-100 mu m;

the high molecular polymer is any one of wholly aromatic polyimide, bismaleimide and cyanate resin;

the dispersant is any one of silane coupling agents KH-550, KH-560 and KH-570;

the solvent is any one of N, N-dimethylformamide, acetone, tetrahydrofuran and chloroform;

step 2, performing ion exchange to obtain antibacterial diatomite;

placing the diatomite in an antibacterial agent with the concentration of 0.05mol/L-0.2mol/L, stirring at room temperature in a dark place for 2h-3h, then placing in a vacuum environment in a dark place for soaking for 1h-2h, washing for 3-5 times by using deionized water, filtering, and drying at 60-80 ℃ for 12h-24h to obtain the antibacterial diatomite;

the antibacterial agent is silver nitrate (AgNO) ₃ ) Solution, copper chloride (CuCl) ₂ ·2H ₂ O) solution, zinc sulfate (ZnSO) ₄ ·7H ₂ O) any one of the solutions;

step 3, preparing single-stage micropore sound insulation inner wall brick slurry;

stirring and mixing the quartz fiber microspheres obtained in the step 1, the antibacterial diatomite obtained in the step 2 and the mixed slurry for 2-3 hours at room temperature to obtain single-stage micropore sound insulation inner wall brick slurry;

wherein, the single-stage micropore sound insulation inner wall brick slurry comprises the following components in percentage by mass: 18-23% of quartz fiber microspheres, 15-20% of bacterial diatomite and 57-67% of mixed slurry, wherein the total mass of the components is 100%;

the mixed slurry comprises the following components in percentage by mass: 12 to 15 percent of coal gangue ore, 20 to 23 percent of clay, 5 to 7 percent of calcium carbonate, 1 to 4 percent of magnesium silicate, 3 to 6 percent of calcium silicate, 1 to 5 percent of sodium silicate and 40 to 58 percent of hard water, wherein the total mass of the components is 100 percent.

Step 4, sintering at high temperature to obtain the two-stage micropore sound insulation inner wall brick;

and (4) feeding the slurry of the single-stage microporous sound-insulating inner wall brick obtained in the step (3) into a hydraulic brick press, making a blank under the pressure of 1.5-2.5 MPa under the condition that the flow of the slurry is 20%, maintaining the pressure for 25s, drying at the temperature of 100-150 ℃ for 1-2 h, then transferring the blank to a high-temperature sintering furnace, and sintering at the temperature of 1050-1100 ℃ for 1.5-2 h to obtain the antibacterial two-stage microporous sound-insulating inner wall brick.

The invention selects superfine glass fiber powder with the diameter of a protofilament of 5-10 mu m and the average fiber length of 50-100 mu m to be added into the inner wall brick slurry. The diameter of the quartz fiber microsphere can be regulated to 109-180 mu m through the addition amount of the high molecular polymer and the dispersing agent and the sieving mesh number so as to control the density of the quartz fiber skeleton in the interior wall brick. Stirring at room temperature in the dark for 2-3h when the concentration of the antibacterial agent is 0.05-0.2 mol/L, and soaking in vacuum in the dark for 1-2 h to control the antibacterial ions to completely perform ion exchange, diffuse and adsorb to the micropores on the surface of the diatomite. The distribution of the quartz fiber microspheres and the antibacterial kieselguhr in the sound insulation inner wall brick is controlled by controlling the mass percentage of the quartz fiber microspheres, the antibacterial kieselguhr and the mixed slurry in the inner wall brick slurry. And removing the high molecular polymer wrapping the quartz fiber through high-temperature sintering to obtain the antibacterial two-stage micropore sound-insulation inner wall brick.

The micropore of quartz fiber skeleton and the surperficial micropore of antibiotic diatomaceous earth are favorable to the sound wave dissipation in the interior wall brick of doublestage micropore sound insulation, and the interior wall brick makes quartz fiber skeleton and antibiotic diatomaceous earth zonulae occludens owing to shrink after the sintering, provides complicated propagation path for the sound wave, improves sound absorption and sound insulation effect. When the sound wave is transmitted to the micropores of the antibacterial diatomite, the resonance generated in the micropores by the sound wave is beneficial to the release of the antibacterial ions adsorbed in the micropores. In addition, the quartz fiber framework enhances the compressive strength of the sound-insulation inner wall brick. The invention has wide application prospect in the fields of building home decoration and the like.

Example 1

Adding 20% of superfine quartz fiber powder with the precursor diameter of 5 mu m and the average fiber length of 80 mu m, 2.0% of wholly aromatic polyimide and 1.1% of silane coupling agent KH-550 into 76.9% of tetrahydrofuran, uniformly stirring, drying the mixed solution at 80 ℃ for 12h, grinding, and screening by a 100-mesh screen to obtain quartz fiber microspheres with the average diameter of 150 mu m;

placing the diatomite in 0.2mol/L silver nitrate solution, stirring at room temperature in a dark place for 3h, placing in a vacuum environment for soaking in a dark place for 2h, washing the soaked diatomite with deionized water for 5 times, filtering, and drying at 60 ℃ for 24h to obtain silver-loaded antibacterial diatomite;

adding 45% of hard water into 15% of gangue ore, 22% of clay, 6% of calcium carbonate, 3% of magnesium silicate, 5% of calcium silicate and 4% of sodium silicate, and uniformly stirring and mixing to obtain mixed slurry; stirring and mixing 20% of quartz fiber microspheres, 18% of silver-loaded antibacterial diatomite and 62% of mixed slurry for 3 hours at room temperature to obtain single-stage microporous sound insulation inner wall brick slurry.

And (3) feeding the single-stage microporous sound-insulation inner wall brick slurry into a hydraulic brick press, and performing blank making under the pressure of 2.0MPa and pressure maintaining for 25s under the condition that the slurry flow is 20%. And after drying for 2 hours at 100 ℃, transferring the green brick to a high-temperature sintering furnace, and sintering for 2 hours at 1050 ℃ to obtain the antibacterial two-stage microporous sound-insulation inner wall brick.

Example 2

Adding superfine quartz fiber powder with the diameter of 18 percent of protofilament of 10 mu m and the average fiber length of 100 mu m, bismaleimide accounting for 2.4 percent and a silane coupling agent KH-570 accounting for 1.0 percent into N, N-dimethylformamide accounting for 78.6 percent, uniformly stirring, drying the mixed solution at 60 ℃ for 24 hours, grinding, and screening by a screen with 80 meshes to obtain the quartz fiber microspheres with the average diameter of 180 mu m.

The diatomite is placed in 0.05mol/L zinc sulfate solution, stirred at room temperature in a dark place for 2 hours, and then placed in a vacuum environment to be soaked in the dark place for 1 hour. And washing the impregnated diatomite with deionized water for 3 times, filtering, and drying at 80 ℃ for 12 hours to obtain the zinc-loaded antibacterial diatomite.

Adding hard water of 50 percent into coal gangue ore of 12 percent, clay of 23 percent, calcium carbonate of 5 percent, magnesium silicate of 4 percent, calcium silicate of 3 percent and sodium silicate of 3 percent, and stirring and mixing evenly to obtain mixed slurry; and stirring and mixing 18% of quartz fiber microspheres, 15% of zinc-loaded antibacterial diatomite and 67% of mixed slurry for 3 hours at room temperature to obtain the single-stage microporous sound insulation inner wall brick slurry.

And (3) feeding the single-stage microporous sound-insulation inner wall brick slurry into a hydraulic brick press, and performing blank making under the pressure of 2.5MPa and pressure maintaining for 25s under the condition that the slurry flow is 20%. And drying at 150 ℃ for 1h, transferring the green brick to a high-temperature sintering furnace, and sintering at 1100 ℃ for 1.5h to obtain the antibacterial two-stage micropore sound-insulating inner wall brick.

Example 3

Adding superfine quartz fiber powder with the precursor diameter of 5 microns and the average fiber length of 60 microns in 24 percent, cyanate ester resin in 2.4 percent and silane coupling agent KH-560 in 1.2 percent into chloroform in 72.4 percent, uniformly stirring, drying the mixed solution at 70 ℃ for 18h, grinding, and sieving by a 120-mesh sieve to obtain the quartz fiber microspheres with the average diameter of 120 microns.

The diatomite is placed in 0.1mol/L silver nitrate solution, stirred at room temperature in a dark place for 2 hours, and then placed in a vacuum environment in a dark place for dipping for 2 hours. And washing the impregnated diatomite with deionized water for 4 times, filtering, and drying at 60 ℃ for 24 hours to obtain the silver-loaded antibacterial diatomite.

Adding 47% of hard water into 14% of coal gangue ore, 20% of clay, 7% of calcium carbonate, 1% of magnesium silicate, 6% of calcium silicate and 5% of sodium silicate, and uniformly stirring and mixing to obtain mixed slurry; and stirring and mixing 23% of quartz fiber microspheres, 18% of silver-loaded antibacterial diatomite and 59% of mixed slurry for 2 hours at room temperature to obtain the single-stage microporous sound insulation inner wall brick slurry.

And (3) feeding the single-stage microporous sound-insulation inner wall brick slurry into a hydraulic brick press, and performing blank making under the pressure of 1.5MPa and maintaining the pressure for 25s under the condition that the slurry flow is 20%. And drying at 150 ℃ for 1h, transferring the green brick to a high-temperature sintering furnace, and sintering at 1050 ℃ for 2h to obtain the antibacterial two-stage micropore sound-insulation inner wall brick.

Example 4

Adding superfine quartz fiber powder with the diameter of 24 percent of protofilament of 50 mu m and the average fiber length of 50 mu m, polyimide of 2.4 percent and a silane coupling agent KH-570 of 1.2 percent into N, N-dimethylformamide of 72.4 percent, uniformly stirring, drying the mixed solution at 80 ℃ for 12h, grinding and screening by a screen of 140 meshes to obtain the quartz fiber microsphere with the average diameter of 109 mu m.

The diatomite is placed in 0.2mol/L copper chloride solution, stirred at room temperature in a dark place for 3 hours, and then placed in a vacuum environment to be immersed in the dark place for 2 hours. And washing the impregnated diatomite with deionized water for 5 times, filtering, and drying at 70 ℃ for 18 hours to obtain the copper-loaded antibacterial diatomite.

Adding 49% of hard water into 14% of coal gangue ore, 20% of clay, 5% of calcium carbonate, 3% of magnesium silicate, 6% of calcium silicate and 3% of sodium silicate, and uniformly stirring and mixing to obtain mixed slurry; and stirring and mixing 23% of quartz fiber microspheres, 15% of copper-loaded antibacterial diatomite and 62% of mixed slurry for 3 hours at room temperature to obtain the single-stage microporous sound insulation inner wall brick slurry.

And (3) feeding the single-stage microporous sound-insulation inner wall brick slurry into a hydraulic brick press, and performing blank making under the pressure of 2.5MPa and pressure maintaining for 25s under the condition that the slurry flow is 20%. And after drying for 2 hours at 120 ℃, transferring the green brick to a high-temperature sintering furnace, and sintering at 1100 ℃ for 1.5 hours to obtain the antibacterial two-stage microporous sound-insulating inner wall brick.

Comparative example 1

Comparative example 1 differs from example 1 in that no silica fiber microspheres were added to the slurry.

Comparative example 2

Comparative example 2 is different from example 1 in that the ultra fine quartz fiber powder was directly mixed into the slurry without performing step 1.

Comparative example 3

Comparative example 3 differs from example 1 in that no antimicrobial diatomaceous earth was added to the slurry.

Comparative example 4

Comparative example 4 differs from example 1 in that step 2 was not performed and diatomaceous earth was directly mixed into the slurry.

Comparative example 5

Comparative example 5 is different from example 1 in that the slurry does not contain the silica fiber microspheres and the antibacterial diatomaceous earth.

Table 1 is a comparison of the noise reduction coefficient, sound transmission loss, antibacterial ratio and compression strength of the soundproof inner wall tiles prepared in example 1 and comparative examples 1 to 5. As can be seen from table 1, the micropores of the quartz fiber skeleton and the surface micropores of the antibacterial diatomaceous earth in the two-stage microporous sound-insulating inner wall brick of example 1 facilitate the dissipation of sound waves, and the internal structure of the brick is complex, and can provide a complex propagation path for sound waves, so that the brick has excellent sound absorption and sound insulation properties. Compared with the comparative example 1, the sound insulation brick only consists of the antibacterial diatomite and other raw materials, and when sound waves enter the brick body, only the air holes generated when the calcium carbonate is melted during the sintering of the brick body and the micropores on the surface of the antibacterial diatomite are used as cavities for vibration, so that the sound insulation effect is poor. Meanwhile, the brick body is not provided with a fiber reinforced phase, so that the compressive strength of the inner wall brick is reduced. Compared with the comparative example 2, the sound insulation brick is composed of dispersed quartz fibers, antibacterial diatomite and other raw materials, and the quartz fibers in the green body are wrapped due to shrinkage rates of the antibacterial diatomite and the other raw materials during sintering. When sound waves are transmitted, vibration is not easy to generate, and the sound absorption and insulation performance is reduced. Compared with comparative example 3, the sound-insulating brick is composed of the quartz fiber framework and other raw materials, and the antibacterial performance of the sound-insulating inner wall brick is reduced. Compared with comparative example 4, the sound-insulating brick is composed of a quartz fiber skeleton, diatomite and other raw materials, and has a two-stage microporous structure, so that the sound-absorbing and sound-insulating properties are similar to those of example 1, but the antibacterial properties are reduced. Compared with the comparative example 5, the sound-insulating brick does not contain quartz fiber and diatomite, the sound absorption and insulation effect is only caused by the resonance of air holes during sintering, the sound insulation effect is poor, and the compressive strength is reduced due to uneven large pores.

Table 1 results of performance test of soundproof inner wall tiles prepared in example 1 and comparative examples 1 to 5

Fig. 1 is a schematic structural diagram of an antibacterial two-stage microporous sound-insulation inner wall brick prepared by the invention, and the antibacterial two-stage microporous sound-insulation inner wall brick comprises a brick body 1, wherein the brick body 1 is composed of a quartz fiber framework 3, antibacterial diatomite 2 and raw materials 4 except the antibacterial diatomite and the quartz fiber framework, a two-stage microporous structure is contained in the brick body, and the complex structural composition is favorable for sound wave dissipation.

Claims (6)

1. A preparation method of an antibacterial two-stage micropore sound insulation inner wall brick is characterized by comprising the following steps:

step 1, preparing quartz fiber microspheres;

adding superfine quartz fiber powder, a high molecular polymer and a dispersing agent into a solvent, uniformly stirring to obtain a mixed solution, drying, grinding and sieving to obtain quartz fiber microspheres;

the mixed solution comprises the following components in percentage by mass: 18 to 24 percent of superfine quartz fiber, 1.2 to 2.4 percent of high molecular polymer, 0.9 to 1.2 percent of dispersant and 72.4 to 79.9 percent of solvent, wherein the total mass of the components is 100 percent;

step 2, performing ion exchange to obtain antibacterial diatomite;

placing the diatomite in an antibacterial agent, stirring at room temperature in a dark place, then placing in a vacuum environment in a dark place for soaking, washing with deionized water, filtering and drying to obtain the antibacterial diatomite;

step 3, preparing single-stage micropore sound insulation inner wall brick slurry;

stirring and mixing the quartz fiber microspheres obtained in the step 1, the antibacterial diatomite obtained in the step 2 and the mixed slurry for 2-3 hours at room temperature to obtain single-stage micropore sound insulation inner wall brick slurry;

the single-stage micropore sound insulation inner wall brick slurry comprises the following components in percentage by mass: 18-23% of quartz fiber microspheres, 15-20% of antibacterial diatomite and 57-67% of mixed slurry, wherein the total mass of the components is 100%;

the mixed slurry comprises the following components in percentage by mass: 12 to 15 percent of coal gangue ore, 20 to 23 percent of clay, 5 to 7 percent of calcium carbonate, 1 to 4 percent of magnesium silicate, 3 to 6 percent of calcium silicate, 1 to 5 percent of sodium silicate and 40 to 58 percent of hard water, wherein the total mass of the components is 100 percent;

and 4, sintering at high temperature to obtain the double-stage micropore sound insulation inner wall brick.

2. The method for preparing the antibacterial double-stage microporous sound insulation inner wall brick as claimed in claim 1, wherein in the step 1, the diameter of the filament of the superfine quartz fiber powder is 5 μm to 10 μm, and the average fiber length is 50 μm to 100 μm; the drying temperature is 60-80 ℃, and the drying time is 12-24 h.

3. The method for preparing the antibacterial two-stage microporous sound insulation inner wall brick according to claim 1, wherein in the step 1, the high molecular polymer is any one of wholly aromatic polyimide, bismaleimide and cyanate ester resin; the dispersant is any one of silane coupling agents KH-550, KH-560 and KH-570; the solvent is any one of N, N-dimethylformamide, acetone, tetrahydrofuran and chloroform.

4. The method for preparing the antibacterial double-stage microporous sound insulation inner wall brick as claimed in claim 1, wherein in the step 2, the antibacterial agent is any one of a silver nitrate solution, a copper chloride solution and a zinc sulfate solution; the concentration of the antibacterial agent is 0.05mol/L-0.2mol/L.

5. The preparation method of the antibacterial two-stage microporous sound insulation inner wall brick according to claim 1, wherein in the step 2, the stirring time in the dark place is 2h-3h, the soaking time in the dark place is 1h-2h, and the drying temperature is 60-80 ℃; the drying time is 12-24 h.

6. The preparation method of the antibacterial double-stage micropore sound insulation inner wall brick as claimed in claim 1, wherein in the step 4, the concrete steps are as follows:

and (3) feeding the slurry of the single-stage microporous sound-insulating inner wall brick obtained in the step (3) into a hydraulic brick press, making a blank under the pressure of 1.5-2.5 MPa under the condition that the flow rate of the slurry is 20%, maintaining the pressure for 25s, drying at 100-150 ℃ for 1-2 h, transferring the blank to a high-temperature sintering furnace, and sintering at 1050-1100 ℃ for 1.5-2 h to obtain the antibacterial two-stage microporous sound-insulating inner wall brick.

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