Preparation method of strong sound-absorbing composite wall material

Abstract

The application relates to the technical field of wall sound insulation materials, in particular to a preparation method of a strong sound absorption composite wall material, which comprises the following raw materials in parts by weight: 50-60 parts of a base material, 20-30 parts of an additive, 10-15 parts of a bonding agent, 8-10 parts of a flame retardant, 10-15 parts of deionized water, 10-12 parts of glass wool, 6-8 parts of rock wool and 6-8 parts of an additive solution; in the application, illite after calcination treatment forms a porous structure, the interlayer spacing is expanded, when sound waves enter the tiny pores of the porous structure, air molecules vibrate at high speed in the narrow channel, the speed of the air molecules close to the pore wall is reduced, the sound wave kinetic energy is consumed through intermolecular friction and friction between the molecules and the pore wall, different frequency sound waves are matched, carbon black particles fill the gap between the rubber molecular chains, the pores are prevented from being closed due to thermal expansion, the molecules absorb energy, the sound wave transmission is blocked, the overall sound insulation amount is improved, and the sound absorption performance of the material is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of wall sound insulation materials technology, specifically a method for preparing a strong sound-absorbing composite wall material. Background Technology

[0002] Composite wall materials are a type of multifunctional building component that achieves core functions such as sound insulation, heat preservation, fire resistance, and lightweighting through structural optimization and material composites. They are widely used in modern buildings, industrial facilities, and special scenarios.

[0003] In existing technologies, the basic wall material has a single structure lacking porous layers, resulting in direct reflection of sound waves rather than absorption, leading to poor sound insulation. Furthermore, the basic wall material can suddenly crack and collapse due to internal moisture evaporation caused by heat, and its fire resistance is also poor. Therefore, this invention provides a method for preparing a highly sound-absorbing composite wall material. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing a strong sound-absorbing composite wall material. The strong sound-absorbing composite wall material prepared by this invention not only has good flame retardant properties, but also excellent hardness properties, effectively improving the performance of the strong sound-absorbing composite wall material.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a strong sound-absorbing composite wall material, comprising the following raw materials in parts by weight: 50-60 parts base material, 20-30 parts additives, 10-15 parts adhesive, 8-10 parts flame retardant, 10-15 parts deionized water, 10-12 parts glass wool, 6-8 parts rock wool, and 6-8 parts additive liquid.

[0006] The base material is prepared by using raw materials including lignin sulfonate, cement, sand and gravel, fly ash, silica fume, and diatomaceous earth.

[0007] Additive preparation, the raw materials for the additives include illite, carbon black, and butyl rubber;

[0008] The adhesive is prepared from raw materials including glass fiber, ethanol, epoxy resin, and polyetheramine.

[0009] Flame retardant preparation, the raw materials for flame retardants include aluminum hydroxide, ethanol, and expanded graphite;

[0010] The additive solution is prepared from raw materials including polyethylene glycol, nano-silica, deionized water, and sodium carboxymethyl cellulose.

[0011] Preferably, the preparation method of the base material is as follows: lignosulfonate, cement, sand, fly ash, silica fume, and diatom mud are put into a mixer, the mixer is set to a mixing speed of 200-300 rpm, and the processing time is 40-60 min to obtain the base material, wherein the mass ratio of lignosulfonate, cement, sand, fly ash, silica fume, and diatom mud is 1:(50-70):(30-40):(30-40):(20-30):(20-30).

[0012] Preferably, the method for preparing the additive includes the following steps:

[0013] Step 1: Crush illite to a particle size of 50-80 μm using a crusher, then place it in a resistance furnace. Set the temperature of the resistance furnace to 400-500℃ and process for 10-20 minutes. Place the resulting product in an ultrasonic crusher. Set the frequency of the ultrasonic crusher to 40-45 kHz and process for 60-80 minutes to obtain the first powder.

[0014] Step 2: Place the carbon black in a drying oven, set the temperature of the drying oven to 70-90℃, and the processing time to 60-80 minutes to obtain the second powder;

[0015] Step 3: Put the first powder, the second powder, and butyl rubber into a two-roll mill. Set the temperature of the two-roll mill to 120-140℃ and the processing time to 20-40 minutes. The resulting product is then pressed into sheets with a thickness of 5-8 mm. The sheets are then treated with cold water to 30-40℃ to obtain the additive.

[0016] Preferably, the mass ratio of carbon black, illite, and butyl rubber is 1:(5-10):(10-20).

[0017] Preferably, the adhesive is prepared by: placing glass fiber and ethanol into a mixer, setting the mixer speed to 200-400 rpm, and the processing time to 40-60 min; placing the resulting product into a drying oven, setting the drying oven temperature to 70-90℃, and the processing time to 60-80 min; then placing epoxy resin, ethanol, polyetheramine, and glass fiber into the mixer, setting the mixer speed to 300-500 rpm, and the processing time to 50-70 min, to obtain the adhesive.

[0018] Preferably, the mass ratio of glass fiber, ethanol, epoxy resin and polyetheramine is 1:(20-30):(5-7):(1-2).

[0019] Preferably, the flame retardant is prepared as follows: aluminum hydroxide and ethanol are placed in a mixer, the mixer is set to a stirring speed of 200-400 rpm, and the processing time is 40-60 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 70-90℃, and the processing time is 60-80 min. The resulting product and expanded graphite are placed in a twin-screw extruder, the twin-screw extruder is set to a stirring speed of 200-300 rpm, and the processing time is 20-40 min. The resulting product is placed in a vulcanizing machine, the vulcanizing machine is set to a temperature of 160-180℃, a pressure of 10-12 MPa, and a processing time of 10-20 min to obtain the flame retardant.

[0020] Preferably, the mass ratio of aluminum hydroxide, ethanol, and expanded graphite is (3-5):(10-15):1.

[0021] Preferably, the preparation method of the additive solution includes the following steps:

[0022] Step 1: Mix polyethylene glycol and nano silica, then add deionized water and stir to obtain a mixture. The mass ratio of polyethylene glycol, nano silica and deionized water is 7:(2-3):(14-16).

[0023] Step 2: Add the mixture to the spray dryer, set the inlet air temperature to 110-120℃ and the outlet air temperature to 60-70℃, and collect the dried powder;

[0024] Step 3: Mix the dried powder and water at a mass ratio of 1:(1.5-2), then add sodium carboxymethyl cellulose, transfer to a dispersion tank, and treat at 1000-1200 rpm for 8-10 minutes to obtain the additive solution, wherein the mass of sodium carboxymethyl cellulose is 1-2% of the mass of the additive.

[0025] Preferably, a method for preparing a strong sound-absorbing composite wall material includes the following steps:

[0026] S1: Add the base material, additives, binder, flame retardant, and deionized water to the mixer, set it to 600-700 rpm and stir for 40-50 minutes to obtain the coarse material;

[0027] S2: Add coarse material, glass wool, and rock wool to a vibrating table, set the frequency to 50-80Hz, and process for 30-40 minutes to obtain slurry;

[0028] S3: Pour the slurry into the mold and let it stand for 3-4 hours at a temperature of 38-42℃ and a relative humidity of 68-72%. After demolding, the green body is obtained.

[0029] S4: Spray the additive liquid onto the surface of the blank, then transfer the blank into the curing oven, set the temperature to 50-65℃, and treat for 50-60 minutes to obtain a strong sound-absorbing composite wall material.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. In this invention, illite after calcination forms a porous structure with increased interlayer spacing. When sound waves enter the tiny pores of the porous structure, air molecules vibrate at high speed in the narrow channels. The speed of air molecules near the pore walls decreases, and the friction between molecules and the pore walls consumes the sound wave energy. This matches sound waves of different frequencies. Carbon black particles fill the gaps between rubber molecular chains, preventing thermal expansion from causing pore closure. Molecules absorb energy, blocking sound wave transmission and enhancing the interfacial bonding between illite and carbon black. Butyl rubber effectively blocks the airborne sound propagation path, significantly improving the overall sound insulation and enhancing the sound absorption performance of the material.

[0032] 2. In this invention, aluminum hydroxide releases water vapor to dilute oxygen and inhibit the combustion chain reaction. The decomposition products of aluminum hydroxide form a protective layer to reduce toxic fumes. Expanded graphite expands in volume at high temperatures to form a carbon layer, which isolates heat and oxygen. The decomposition products of expanded graphite and aluminum hydroxide combine to form a network barrier. Expanded graphite and aluminum hydroxide, as composite flame retardants, significantly improve the fire resistance of materials through multiple mechanisms of chemical synergy, physical barrier, and environmental safety. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below.

[0035] Example 1: A strong sound-absorbing composite wall material, comprising the following raw materials in parts by weight: 50 parts base material, 20 parts additives, 10 parts adhesive, 8 parts flame retardant, 10 parts deionized water, 10 parts glass wool, 6 parts rock wool, and 6 parts additive liquid;

[0036] The base material is prepared by using raw materials including lignin sulfonate, cement, sand and gravel, fly ash, silica fume, and diatomaceous earth.

[0037] Additive preparation, the raw materials for the additives include illite, carbon black, and butyl rubber;

[0038] The adhesive is prepared from raw materials including glass fiber, ethanol, epoxy resin, and polyetheramine.

[0039] Flame retardant preparation, the raw materials for flame retardants include aluminum hydroxide, ethanol, and expanded graphite;

[0040] The additive solution is prepared from raw materials including polyethylene glycol, nano-silica, deionized water, and sodium carboxymethyl cellulose.

[0041] The preparation method of the base material is as follows: lignin sulfonate, cement, sand, fly ash, silica fume, and diatom mud are put into a mixer, the mixer is set to a mixing speed of 200 rpm, and the processing time is 40 min to obtain the base material. The mass ratio of lignin sulfonate, cement, sand, fly ash, silica fume, and diatom mud is 1:50:30:30:20:20.

[0042] The preparation method of the additive includes the following steps:

[0043] Step 1: Crush illite to a particle size of 50μm using a crusher, then put it into a resistance furnace. Set the temperature of the resistance furnace to 400℃ and process for 10 minutes. Put the resulting product into an ultrasonic crusher. Set the frequency of the ultrasonic crusher to 40 kHz and process for 60 minutes to obtain the first powder.

[0044] Step 2: Place the carbon black in a drying oven, set the temperature to 70℃, and the processing time to 60 minutes to obtain the second powder.

[0045] Step 3: Put the first powder, the second powder, and butyl rubber into a two-roll mill. Set the temperature of the two-roll mill to 120℃ and the processing time to 20 minutes. The resulting product is then pressed into sheets with a thickness of 5 mm. The sheets are then treated with cold water to 30℃ to obtain the additive.

[0046] The mass ratio of carbon black, illite, and butyl rubber is 1:5:10.

[0047] The adhesive is prepared by: placing glass fiber and ethanol into a mixer, setting the mixer speed to 200 rpm, and processing time to 40 min; placing the resulting product into a drying oven, setting the drying oven temperature to 70℃, and processing time to 60 min; then placing epoxy resin, ethanol, polyetheramine, and glass fiber into a mixer, setting the mixer speed to 300 rpm, and processing time to 50 min to obtain the adhesive.

[0048] The mass ratio of glass fiber, ethanol, epoxy resin, and polyetheramine is 1:20:5:1.

[0049] The flame retardant is prepared as follows: aluminum hydroxide and ethanol are placed in a mixer, the mixer is set to a stirring speed of 200 rpm, and the processing time is 40 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 70℃, and the processing time is 60 min. The resulting product and expanded graphite are placed in a twin-screw extruder, the twin-screw extruder is set to a stirring speed of 200 rpm, and the processing time is 20 min. The resulting product is placed in a vulcanizing machine, the vulcanizing machine is set to a temperature of 160℃, a pressure of 10 MPa, and a processing time of 10 min to obtain the flame retardant.

[0050] The mass ratio of aluminum hydroxide, ethanol, and expanded graphite is 3:10:1.

[0051] The preparation method of the additive solution includes the following steps:

[0052] Step 1: Mix polyethylene glycol and nano silica, then add deionized water and stir to obtain a mixture. The mass ratio of polyethylene glycol, nano silica and deionized water is 7:2:14.

[0053] Step 2: Add the mixture to the spray dryer, set the inlet air temperature to 110℃ and the outlet air temperature to 60℃, and collect the dried powder;

[0054] Step 3: Mix the dried powder and water at a mass ratio of 1:1.5, then add sodium carboxymethyl cellulose, transfer to a dispersion tank, and process at 1000 rpm for 8 minutes to obtain the additive solution, wherein the mass of sodium carboxymethyl cellulose is 1% of the mass of the additive.

[0055] One method for preparing a high-sound-absorbing composite wall material includes the following steps:

[0056] S1: Add the base material, additives, binder, flame retardant, and deionized water to the mixer, set it to 600 rpm and stir for 40 minutes to obtain the coarse material;

[0057] S2: Add coarse material, glass wool, and rock wool to a vibrating table, set the frequency to 50Hz, and process for 30 minutes to obtain slurry;

[0058] S3: Pour the slurry into the mold and let it stand for 3 hours at a temperature of 38℃ and a relative humidity of 68%. After demolding, the green body is obtained.

[0059] S4: Spray the additive liquid onto the surface of the blank, then transfer the blank into the curing oven, set the temperature to 50℃, and process for 50 minutes to obtain a strong sound-absorbing composite wall material.

[0060] Example 2: A strong sound-absorbing composite wall material, comprising the following raw materials by weight: 55 parts base material, 25 parts additives, 12 parts adhesive, 9 parts flame retardant, 12 parts deionized water, 11 parts glass wool, 7 parts rock wool, and 7 parts additive liquid.

[0061] The base material is prepared by using raw materials including lignin sulfonate, cement, sand and gravel, fly ash, silica fume, and diatomaceous earth.

[0062] Additive preparation, the raw materials for the additives include illite, carbon black, and butyl rubber;

[0063] The adhesive is prepared from raw materials including glass fiber, ethanol, epoxy resin, and polyetheramine.

[0064] Flame retardant preparation, the raw materials for flame retardants include aluminum hydroxide, ethanol, and expanded graphite;

[0065] The additive solution is prepared from raw materials including polyethylene glycol, nano-silica, deionized water, and sodium carboxymethyl cellulose.

[0066] The preparation method of the base material is as follows: lignosulfonate, cement, sand, fly ash, silica fume, and diatomaceous earth are placed in a mixer, the mixer is set to a mixing speed of 250 rpm, and the processing time is 50 min to obtain the base material. The mass ratio of lignosulfonate, cement, sand, fly ash, silica fume, and diatomaceous earth is 1:60:35:35:25:25.

[0067] The preparation method of the additive includes the following steps:

[0068] Step 1: Crush illite to a particle size of 65μm using a crusher, then put it into a resistance furnace. Set the temperature of the resistance furnace to 450℃ and process for 15 minutes. Put the resulting product into an ultrasonic crusher. Set the frequency of the ultrasonic crusher to 43kHz and process for 70 minutes to obtain the first powder.

[0069] Step 2: Place the carbon black in a drying oven, set the temperature to 80℃, and the processing time to 70 minutes to obtain the second powder.

[0070] Step 3: Put the first powder, the second powder, and butyl rubber into a two-roll mill. Set the temperature of the two-roll mill to 130℃ and the processing time to 30 minutes. The resulting product is then pressed into sheets with a thickness of 6.5 mm. The sheets are then treated with cold water to 35℃ to obtain the additive.

[0071] The mass ratio of carbon black, illite, and butyl rubber is 1:8:15.

[0072] The adhesive is prepared by: placing glass fiber and ethanol into a mixer, setting the mixer speed to 300 rpm, and processing time to 50 min; placing the resulting product into a drying oven, setting the drying oven temperature to 80℃, and processing time to 70 min; then placing epoxy resin, ethanol, polyetheramine, and glass fiber into the mixer, setting the mixer speed to 400 rpm, and processing time to 60 min to obtain the adhesive.

[0073] The mass ratio of glass fiber, ethanol, epoxy resin, and polyetheramine is 1:25:6:1.5.

[0074] The flame retardant is prepared as follows: aluminum hydroxide and ethanol are placed in a mixer, the mixer is set to a stirring speed of 300 rpm, and the processing time is 50 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 80℃, and the processing time is 70 min. The resulting product and expanded graphite are placed in a twin-screw extruder, the twin-screw extruder is set to a stirring speed of 250 rpm, and the processing time is 30 min. The resulting product is placed in a vulcanizing machine, the vulcanizing machine is set to a temperature of 170℃, a pressure of 11 MPa, and a processing time of 15 min to obtain the flame retardant.

[0075] The mass ratio of aluminum hydroxide, ethanol, and expanded graphite is 4:12:1.

[0076] The preparation method of the additive solution includes the following steps:

[0077] Step 1: Mix polyethylene glycol and nano silica, then add deionized water and stir to obtain a mixture. The mass ratio of polyethylene glycol, nano silica and deionized water is 7:2.5:15.

[0078] Step 2: Add the mixture to the spray dryer, set the inlet air temperature to 115℃ and the outlet air temperature to 65℃, and collect the dried powder;

[0079] Step 3: Mix the dried powder and water at a mass ratio of 1:1.8, then add sodium carboxymethyl cellulose, transfer to a dispersion tank, and process at 1100 rpm for 9 minutes to obtain the additive solution, wherein the mass of sodium carboxymethyl cellulose is 1.5% of the mass of the additive.

[0080] One method for preparing a high-sound-absorbing composite wall material includes the following steps:

[0081] S1: Add the base material, additives, binders, flame retardants, and deionized water to the mixer, set it to 650 rpm and stir for 45 minutes to obtain the coarse material;

[0082] S2: Add coarse material, glass wool, and rock wool to a vibrating table, set the frequency to 65Hz, and process for 35 minutes to obtain slurry;

[0083] S3: Pour the slurry into the mold and let it stand for 3.5 hours at a temperature of 40℃ and a relative humidity of 70%. After demolding, the green body is obtained.

[0084] S4: Spray the additive liquid onto the surface of the blank, then transfer the blank into the curing oven, set the temperature to 58℃, and process for 55 minutes to obtain a strong sound-absorbing composite wall material.

[0085] Example 3: A strong sound-absorbing composite wall material, comprising the following raw materials by weight: 60 parts base material, 30 parts additives, 15 parts adhesive, 10 parts flame retardant, 15 parts deionized water, 12 parts glass wool, 8 parts rock wool, and 8 parts additive liquid.

[0086] The base material is prepared by using raw materials including lignin sulfonate, cement, sand and gravel, fly ash, silica fume, and diatomaceous earth.

[0087] Additive preparation, the raw materials for the additives include illite, carbon black, and butyl rubber;

[0088] The adhesive is prepared from raw materials including glass fiber, ethanol, epoxy resin, and polyetheramine.

[0089] Flame retardant preparation, the raw materials for flame retardants include aluminum hydroxide, ethanol, and expanded graphite;

[0090] The additive solution is prepared from raw materials including polyethylene glycol, nano-silica, deionized water, and sodium carboxymethyl cellulose.

[0091] The preparation method of the base material is as follows: lignin sulfonate, cement, sand, fly ash, silica fume, and diatom mud are put into a mixer, the mixer is set to a mixing speed of 300 rpm, and the processing time is 60 min to obtain the base material. The mass ratio of lignin sulfonate, cement, sand, fly ash, silica fume, and diatom mud is 1:70:40:40:30:30.

[0092] The preparation method of the additive includes the following steps:

[0093] Step 1: Crush illite to a particle size of 80μm using a crusher, then put it into a resistance furnace. Set the temperature of the resistance furnace to 500℃ and process for 20 minutes. Put the resulting product into an ultrasonic crusher. Set the frequency of the ultrasonic crusher to 45 kHz and process for 80 minutes to obtain the first powder.

[0094] Step 2: Place the carbon black in a drying oven, set the temperature to 90℃, and the processing time to 80 minutes to obtain the second powder.

[0095] Step 3: Put the first powder, the second powder, and butyl rubber into a two-roll mill. Set the temperature of the two-roll mill to 140℃ and the processing time to 40 minutes. The resulting product is then pressed into sheets with a thickness of 8 mm. The sheets are then cooled to 40℃ to obtain the additive.

[0096] The mass ratio of carbon black, illite, and butyl rubber is 1:10:20.

[0097] The adhesive is prepared by: placing glass fiber and ethanol into a mixer, setting the mixer speed to 400 rpm, and processing time to 60 min; placing the resulting product into a drying oven, setting the drying oven temperature to 90℃, and processing time to 80 min; then placing epoxy resin, ethanol, polyetheramine, and glass fiber into the mixer, setting the mixer speed to 500 rpm, and processing time to 70 min to obtain the adhesive.

[0098] The mass ratio of glass fiber, ethanol, epoxy resin, and polyetheramine is 1:30:7:2.

[0099] The flame retardant is prepared as follows: aluminum hydroxide and ethanol are placed in a mixer, the mixer is set to a stirring speed of 400 rpm, and the processing time is 60 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 90℃, and the processing time is 80 min. The resulting product and expanded graphite are placed in a twin-screw extruder, the twin-screw extruder is set to a stirring speed of 300 rpm, and the processing time is 40 min. The resulting product is placed in a vulcanizing machine, the vulcanizing machine is set to a temperature of 180℃, a pressure of 12 MPa, and a processing time of 20 min to obtain the flame retardant.

[0100] The mass ratio of aluminum hydroxide, ethanol, and expanded graphite is 5:15:1.

[0101] The preparation method of the additive solution includes the following steps:

[0102] Step 1: Mix polyethylene glycol and nano silica, then add deionized water and stir to obtain a mixture. The mass ratio of polyethylene glycol, nano silica and deionized water is 7:3:16.

[0103] Step 2: Add the mixture to the spray dryer, set the inlet air temperature to 120℃ and the outlet air temperature to 70℃, and collect the dried powder;

[0104] Step 3: Mix the dry powder and water at a mass ratio of 1:2, then add sodium carboxymethyl cellulose, transfer to a dispersion tank, and process at 1200 rpm for 10 min to obtain the additive solution, wherein the mass of sodium carboxymethyl cellulose is 2% of the mass of the additive.

[0105] One method for preparing a high-sound-absorbing composite wall material includes the following steps:

[0106] S1: Add the base material, additives, binders, flame retardants, and deionized water to the mixer, set it to 700 rpm and stir for 50 minutes to obtain the coarse material;

[0107] S2: Add coarse material, glass wool, and rock wool to a vibrating table, set the frequency to 80Hz, and process for 40 minutes to obtain slurry;

[0108] S3: Pour the slurry into the mold and let it stand for 4 hours at a temperature of 42℃ and a relative humidity of 72%. After demolding, the green body is obtained.

[0109] S4: Spray the additive liquid onto the surface of the blank, then transfer the blank into the curing oven, set the temperature to 65℃, and process for 60 minutes to obtain a strong sound-absorbing composite wall material.

[0110] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain epoxy resin.

[0111] Comparative Example 2 differs from Example 1 in that it does not contain expanded graphite.

[0112] Comparative Example 3 differs from Example 1 in that it does not contain any additives.

[0113] Comparative Example 4 differs from Example 1 in that it does not contain flame retardants.

[0114] Performance testing: The high sound-absorbing composite wall materials prepared in Experiments 1, 2, 3, Comparative Examples 1, 2, 3, and 4 were subjected to performance tests. The test data are recorded in the table below:

[0115] Table 1:

[0116] Testing items Absorption frequency measurement (Hz) Fire resistance time test (min) Example 1 250～4000 210 Example 2 260～4022 220 Example 3 262～4030 230 Comparative Example 1 260～4020 203 Comparative Example 2 390～3900 200 Comparative Example 3 450～3600 205 Comparative Example 4 249～3900 93

[0117] In the performance test, the test standard in GB / T 20247-2006 was adopted to conduct sound absorption performance tests on the composite wall materials prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4.

[0118] The fire resistance time of the composite wall materials prepared in Examples 1, 2, 3, 1, 2, 3 and 4 were tested according to the test standards in GB / T 9978-2008.

[0119] It is evident that the sound absorption frequency and fire resistance time of the composite wall materials prepared in Comparative Examples 1, 2, 3, and 4 are all lower than those in Examples 1, 2, and 3. This indicates that the illite after calcination forms a porous structure with increased interlayer spacing. When sound waves enter the tiny pores of the porous structure, air molecules vibrate at high speed within the narrow channels. The air molecules near the pore walls have reduced speeds, and the friction between molecules and the pore walls consumes the sound wave energy, matching different frequency sound waves. Carbon black particles fill the gaps between rubber molecular chains, preventing thermal expansion from causing pore closure. Molecules absorb energy, blocking sound wave transmission and enhancing the interfacial adhesion between illite and carbon black. Butyl rubber effectively blocks the airborne sound propagation path, significantly improving the overall sound insulation and enhancing the sound absorption performance of the material.

[0120] Aluminum hydroxide releases water vapor to dilute oxygen and inhibit the combustion chain reaction. The decomposition products of aluminum hydroxide form a protective layer, reducing toxic fumes. Expanded graphite expands in volume at high temperatures to form a carbon layer, which isolates heat and oxygen. The decomposition products of expanded graphite and aluminum hydroxide combine to form a network barrier. As a composite flame retardant, expanded graphite and aluminum hydroxide significantly improve the fire resistance of materials through multiple mechanisms, including chemical synergy, physical barriers, and environmental safety.

[0121] By comparing and analyzing the relevant data in the table, it can be seen that the composite wall material prepared by this invention not only has good sound absorption effect but also excellent fire resistance. This indicates that the composite wall material provided by this invention has a broader market prospect and is more suitable for widespread application.

[0122] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0123] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-sound-absorbing composite wall material, characterized in that: It includes the following raw materials in parts by weight: 50-60 parts base material, 20-30 parts additives, 10-15 parts binder, 8-10 parts flame retardant, 10-15 parts deionized water, 10-12 parts glass wool, 6-8 parts rock wool and 6-8 parts additive liquid; The base material is prepared by using raw materials including lignin sulfonate, cement, sand and gravel, fly ash, silica fume and diatomaceous earth. The additive is prepared by means of raw materials including illite, carbon black and butyl rubber, wherein the illite is obtained by calcining at 400-500°C for 10-20 min. The adhesive is prepared from raw materials including glass fiber, ethanol, epoxy resin and polyetheramine. Flame retardant preparation, the raw materials for flame retardants include aluminum hydroxide, ethanol and expanded graphite; The additive solution is prepared from raw materials including polyethylene glycol, nano-silica, deionized water, and sodium carboxymethyl cellulose.

2. The high sound-absorbing composite wall material according to claim 1, characterized in that, The preparation method of the base material is as follows: lignosulfonate, cement, sand, fly ash, silica fume, and diatom mud are put into a mixer. The mixer is set to a mixing speed of 200-300 rpm and a processing time of 40-60 min to obtain the base material. The mass ratio of lignosulfonate, cement, sand, fly ash, silica fume, and diatom mud is 1:(50-70):(30-40):(30-40):(20-30):(20-30).

3. The high sound-absorbing composite wall material according to claim 1, characterized in that, The preparation method of the additive includes the following steps: Step 1: Crush illite to a particle size of 50-80 μm using a crusher, then place it in a resistance furnace. Set the temperature of the resistance furnace to 400-500℃ and process for 10-20 minutes. Place the resulting product in an ultrasonic crusher. Set the frequency of the ultrasonic crusher to 40-45 kHz and process for 60-80 minutes to obtain the first powder. Step 2: Place the carbon black in a drying oven, set the temperature of the drying oven to 70-90℃, and the processing time to 60-80 minutes to obtain the second powder; Step 3: Put the first powder, the second powder, and butyl rubber into a two-roll mill. Set the temperature of the two-roll mill to 120-140℃ and the processing time to 20-40 minutes. The resulting product is then pressed into sheets with a thickness of 5-8 mm. The sheets are then treated with cold water to 30-40℃ to obtain the additive.

4. The high sound-absorbing composite wall material according to claim 3, characterized in that, The mass ratio of carbon black, illite, and butyl rubber is 1:(5-10):(10-20).

5. The high sound-absorbing composite wall material according to claim 1, characterized in that, The adhesive is prepared as follows: glass fiber and ethanol are placed in a mixer, the mixer is set to a stirring speed of 200-400 rpm, and the processing time is 40-60 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 70-90℃, and the processing time is 60-80 min. Then, epoxy resin, ethanol, polyetheramine, and glass fiber are placed in a mixer, the mixer is set to a stirring speed of 300-500 rpm, and the processing time is 50-70 min to obtain the adhesive.

6. The high sound-absorbing composite wall material according to claim 5, characterized in that, The mass ratio of glass fiber, ethanol, epoxy resin and polyetheramine is 1:(20~30):(5~7):(1~2).

7. The high sound-absorbing composite wall material according to claim 1, characterized in that, The flame retardant is prepared as follows: aluminum hydroxide and ethanol are placed in a mixer, the mixer is set to a stirring speed of 200-400 rpm, and the processing time is 40-60 min. The resulting product is placed in a drying oven, the drying oven is set to a temperature of 70-90℃, and the processing time is 60-80 min. The resulting product and expanded graphite are placed in a twin-screw extruder, the twin-screw extruder is set to a stirring speed of 200-300 rpm, and the processing time is 20-40 min. The resulting product is placed in a vulcanizing machine, the vulcanizing machine is set to a temperature of 160-180℃, a pressure of 10-12 MPa, and a processing time of 10-20 min to obtain the flame retardant.

8. The high sound-absorbing composite wall material according to claim 7, characterized in that, The mass ratio of aluminum hydroxide, ethanol, and expanded graphite is (3-5):(10-15):

1.

9. The high sound-absorbing composite wall material according to claim 1, characterized in that, The preparation method of the additive solution includes the following steps: Step 1: Mix polyethylene glycol and nano silica, then add deionized water and stir to obtain a mixture. The mass ratio of polyethylene glycol, nano silica and deionized water is 7:(2-3):(14-16). Step 2: Add the mixture to the spray dryer, set the inlet air temperature to 110-120℃ and the outlet air temperature to 60-70℃, and collect the dried powder; Step 3: Mix the dried powder and water at a mass ratio of 1:(1.5-2), then add sodium carboxymethyl cellulose, transfer to a dispersion tank, and treat at 1000-1200 rpm for 8-10 minutes to obtain the additive solution, wherein the mass of sodium carboxymethyl cellulose is 1-2% of the mass of the additive.

10. A method for preparing a high-sound-absorbing composite wall material, characterized in that, The method of using a high sound-absorbing composite wall material according to any one of claims 1 to 9 includes the following steps: S1: Add the base material, additives, binder, flame retardant, and deionized water to the mixer, set it to 600-700 rpm and stir for 40-50 minutes to obtain the coarse material; S2: Add coarse material, glass wool, and rock wool to a vibrating table, set the frequency to 50-80Hz, and process for 30-40 minutes to obtain slurry; S3: Pour the slurry into the mold and let it stand for 3-4 hours at a temperature of 38-42℃ and a relative humidity of 68-72%. After demolding, the green body is obtained. S4: Spray the additive liquid onto the surface of the blank, then transfer the blank into the curing oven, set the temperature to 50-65℃, and treat for 50-60 minutes to obtain a strong sound-absorbing composite wall material.