Sound-insulating building board and its preparation method

Abstract

The present invention provides a building board with sound insulation function. The building board sequentially comprises a wood substrate layer, a composite layer and a hard fiber board from top to bottom. The composite layer comprises the following raw materials in parts by weight: 6-10 parts of polyethylene, 10-13 parts of high-porosity aerogel, 20-30 parts of mica powder, 15-20 parts of hollow glass beads, 20-30 parts of shell powder, 16-20 parts of diatomite, 6-9 parts of rubber, 23-30 parts of kaolin, 10-20 parts of fly ash, 4-6 parts of water reducing agent, 32-36 parts of cement, 7-11 parts of expanded perlite, 5-9 parts of modified ceramic fiber, 4-9 parts of glass fiber filaments, 3-4 parts of adhesive, 4-8 parts of wood chips, 2-4 parts of flame retardant, 3-7 parts of aluminum silicate, 1-2 parts of dispersant and 100-120 parts of water. The building board prepared by the present invention has better sound insulation effect, adds a new type of high-porosity aerogel, and has high mechanical stability at the same time. The composite layer is prepared by compounding with the rest of the materials, and the building board obtained by bonding with the wood substrate layer and the hard fiber board has good sound insulation, heat preservation and flame retardant effects.

Description

Technical Field

[0001] The present invention belongs to the technical field of building boards, and particularly relates to a building board with sound insulation function and a preparation method thereof. Background Art

[0002] At present, noise pollution has become one of the hazards affecting people's physical and mental health. Noise can damage people's hearing and cause hearing impairment. After being frequently exposed to noise pollution, it will not only affect work efficiency, but also seriously affect people's sleep quality when it is severe. With the improvement of living standards, people's requirements for living environment are also constantly increasing. At present, the strategies for noise prevention and control mainly involve three aspects, namely controlling the noise source, cutting off the noise propagation path and blocking the noise reception. Cutting off the noise propagation is the most economical and practical method at present, and cutting off the noise propagation path is mainly divided into two types: "sound insulation" and "noise elimination". Usually, specific isolation media are configured on the noise propagation path, and sound insulation building boards have emerged as the times require. The building sound insulation materials currently circulating on the market are still not ideal in terms of sound insulation effect, and are also not satisfactory in terms of ensuring the leakage of personal privacy and preventing the influence of external noise.

[0003] The slender nano-network structure of silica aerogel effectively restricts the propagation of local thermal excitation, and its solid thermal conductivity is 2-3 orders of magnitude lower than that of the corresponding vitreous materials. The nano-micro pores inhibit the contribution of gas molecules to heat conduction. The refractive index of silica aerogel is close to 1, and the ratio of the extinction coefficients for infrared and visible light reaches more than 100, which can effectively transmit sunlight and block the infrared thermal radiation of the ambient temperature, becoming an ideal transparent heat insulation material and has been applied in solar energy utilization and building energy conservation. By means of doping, the radiative heat conduction of silica aerogel can be further reduced, and it is the solid material with the lowest thermal conductivity, and is expected to replace polyurethane foam as a new type of refrigerator heat insulation material. Aerogel has low density, large porosity and large internal surface area, resulting in low thermal conductivity. Correspondingly, aerogel is also suitable as a heat insulation material. However, the high porosity also leads to low mechanical stability of aerogel, affecting the comprehensive performance of the thermal insulation material. Summary of the Invention

[0004] The purpose of the present invention is to provide a building board with sound insulation function and a preparation method thereof. The building board prepared by the present invention has better sound insulation effect, adds a new type of high-porosity aerogel, and at the same time has high mechanical stability. The composite layer is prepared by compounding with other materials, and the building board obtained by bonding with the wood substrate layer and the hard fiber board has good sound insulation, heat insulation and flame retardant effects.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] Building board with sound insulation function, the building board sequentially includes a wood-based substrate layer, a composite layer and a hard fiber board from top to bottom; the composite layer includes the following raw materials in parts by weight: 32-36 parts of cement, 20-30 parts of mica powder, 6-10 parts of polyethylene, 15-20 parts of hollow glass beads, 20-30 parts of shell powder, 16-20 parts of diatomite, 6-9 parts of rubber, 23-30 parts of kaolin, 10-20 parts of fly ash, 10-13 parts of high-porosity aerogel, 4-6 parts of water reducing agent, 7-11 parts of expanded perlite, 5-9 parts of modified ceramic fiber, 4-9 parts of glass fiber filaments, 3-4 parts of adhesive, 4-8 parts of wood chips, 2-4 parts of flame retardant, 3-7 parts of aluminum silicate, 1-2 parts of dispersant and 100-120 parts of water.

[0007] Further, the preparation method of the high-porosity aerogel is: mix 100L of ethanol and 40L of tetraethoxysilane and heat to 55°C, stir for 30min, continue to add 15L of 0.05mol / L oxalic acid aqueous solution and continue to stir for 30h, cool to 45°C, and continue to add 5L of 25wt% NH 4 OH aqueous solution, let it stand for 20h, wash with heptane, add 1L of trimethylchlorosilane and mix and stir for 12h to obtain high-porosity aerogel.

[0008] Further, the preparation method of the modified ceramic fiber is: disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl 2-methylacrylate, 7 parts by weight of sodium dodecylsulfonate and 0.26 parts by weight of ammonium persulfate, stir and react at 70°C for 4h, filter, dry and pulverize to obtain modified ceramic fiber.

[0009] Further, the average fiber diameter of the ceramic fiber is 3-3.5μm, the fiber length is 20mm, and the chemical composition is: 47wt% of aluminum oxide, 52wt% of silicon dioxide, and 1wt% of ZrO 2 1.

[0010] Further, the water reducing agent is a polycarboxylate water reducing agent.

[0011] Further, the flame retardant is a compound of antimony trioxide, magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0012] Further, the adhesive is epoxy resin.

[0013] Further, the average molecular weight Mw of the polyethylene is 4000.

[0014] Further, the preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture obtained in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidification and shaping, demold and dry to obtain a composite layer.

[0015] The present invention also provides a preparation method of the building board with sound insulation function, which includes the following steps: Compose the woody base material, polyurethane plastic foam board, composite layer and hard fiber board in a bonded form to obtain a building board with sound insulation function.

[0016] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0017] The building board prepared by the present invention adds a new type of high-porosity aerogel, and at the same time has high mechanical stability. The composite layer is prepared by compounding with materials such as ceramic fibers, and the building board obtained by bonding with the woody base material layer and hard fiber board has good sound insulation, heat preservation and flame retardant effects. Specific Embodiments

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Example 1

[0020] This example provides a building board with sound insulation function. The building board sequentially includes a woody base material layer, a composite layer and a hard fiber board from top to bottom;

[0021] The composite layer includes the following raw materials in parts by weight: 10 parts of high-porosity aerogel, 6 parts of polyethylene, 20 parts of mica powder, 15 parts of hollow glass beads, 20 parts of shell powder, 16 parts of diatomite, 6 parts of rubber, 23 parts of kaolin, 10 parts of fly ash, 32 parts of cement, 4 parts of water reducing agent, 7 parts of expanded perlite, 5 parts of modified ceramic fiber, 4 parts of glass fiber filament, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant and 100 parts of water.

[0022] Among them, the preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane, heat the mixture to 55 °C, stir for 30 min, then continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and stir for another 30 h. Cool the mixture to 45 °C, then add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash it with heptane, add 1 L of trimethylchlorosilane and stir for 12 h to obtain the high-porosity aerogel.

[0023] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfonate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, then filter, dry and pulverize to obtain the modified ceramic fiber.

[0024] In this embodiment, the average molecular weight Mw of polyethylene is 4000.

[0025] The average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1 wt%.

[0026] The water reducing agent is a polycarboxylate water reducing agent. The flame retardant is a compound of antimony trioxide, magnesium hydroxide, and aluminum hydroxide with a mass ratio of 1:3:0.5. The binder is an epoxy resin.

[0027] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel, and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture from step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp it flat, and after solidification and shaping, demold and dry to obtain a composite layer.

[0028] Example 2

[0029] This embodiment provides a building board with sound insulation function. The building board includes a wood substrate layer, a composite layer, and a hard fiber board from top to bottom in sequence; the composite layer includes the following raw materials in parts by weight: 36 parts of cement, 30 parts of mica powder, 10 parts of polyethylene, 20 parts of hollow glass beads, 30 parts of shell powder, 20 parts of diatomite, 9 parts of rubber, 30 parts of kaolin, 20 parts of fly ash, 13 parts of high-porosity aerogel, 6 parts of water reducing agent, 11 parts of expanded perlite, 9 parts of modified ceramic fiber, 9 parts of glass fiber filaments, 4 parts of binder, 8 parts of wood chips, 4 parts of flame retardant, 7 parts of aluminum silicate, 2 parts of dispersant, and 120 parts of water.

[0030] Among them, the preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane, heat the mixture to 55 °C, stir for 30 min, then continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and stir for 30 h. Cool the mixture to 45 °C, and then continue to add 5 L of 25 wt% NH 4 OH aqueous solution. Let it stand for 20 h, wash it with heptane, add 1 L of trimethylchlorosilane and stir for 12 h to obtain the high-porosity aerogel.

[0031] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfonate and 0.26 parts by weight of ammonium persulfate. Stir and react at 70 °C for 4 h, then filter, dry and crush to obtain the modified ceramic fiber.

[0032] In this embodiment, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1. Zhejiang Jiahua Crystal Fiber Co., Ltd.

[0033] The water reducing agent is a polycarboxylate water reducing agent.

[0034] The flame retardant is a compound of antimony trioxide, magnesium hydroxide, and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0035] The binder is epoxy resin.

[0036] The average molecular weight Mw of polyethylene is 4000.

[0037] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water into the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp it and scrape it flat. After solidification and shaping, demold and dry to obtain a composite layer.

[0038] Example 3

[0039] This embodiment provides a building board with sound insulation function. The building board sequentially includes a wood substrate layer, a composite layer, and a hard fiber board from top to bottom; the composite layer includes the following raw materials by weight: 34 parts of cement, 22 parts of mica powder, 8 parts of polyethylene, 17 parts of hollow glass beads, 22 parts of shell powder, 18 parts of diatomite, 8 parts of rubber, 25 parts of kaolin, 12 parts of fly ash, 12 parts of high-porosity aerogel, 5 parts of water reducing agent, 9 parts of expanded perlite, 7 parts of modified ceramic fiber, 6 parts of glass fiber filaments, 3 parts of adhesive, 6 parts of wood chips, 3 parts of flame retardant, 5 parts of aluminum silicate, 2 parts of dispersant, and 110 parts of water.

[0040] The preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane and heat to 55 °C, stir for 30 min, continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, and then add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash with heptane, add 1 L of trimethylchlorosilane and mix and stir for 12 h to obtain the high-porosity aerogel.

[0041] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl 2-methylacrylate, 7 parts by weight of sodium dodecylsulfonate, and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, filter, dry, and pulverize to obtain the modified ceramic fiber.

[0042] In this embodiment, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1.

[0043] The water reducing agent is a polycarboxylate water reducing agent.

[0044] The flame retardant is a compound of antimony trioxide, magnesium hydroxide, and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0045] The adhesive is epoxy resin.

[0046] The average molecular weight Mw of the polyethylene is 4000.

[0047] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel, and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape flat, and after solidifying and shaping, demold and dry to obtain the composite layer.

[0048] Example 4

[0049] This example provides a building board with sound insulation function. The building board sequentially includes a wood substrate layer, a composite layer, and a hard fiber board from top to bottom. The composite layer includes the following raw materials by weight: 34 parts of cement, 28 parts of mica powder, 9 parts of polyethylene, 18 parts of hollow glass beads, 28 parts of shell powder, 17 parts of diatomite, 8 parts of rubber, 28 parts of kaolin, 18 parts of fly ash, 12 parts of high-porosity aerogel, 5 parts of water reducing agent, 9 parts of expanded perlite, 8 parts of modified ceramic fiber, 7 parts of glass fiber filaments, 3 parts of adhesive, 7 parts of wood chips, 3 parts of flame retardant, 5 parts of aluminum silicate, 1 part of dispersant, and 115 parts of water.

[0050] The preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane and heat to 55 °C, stir for 30 min, continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash with heptane, add 1 L of trimethylchlorosilane and mix and stir for 12 h to obtain high-porosity aerogel.

[0051] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl 2-methylacrylate, 7 parts by weight of sodium dodecylsulfonate, and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, filter, dry, and pulverize to obtain modified ceramic fiber.

[0052] In this example, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1.

[0053] The water reducing agent is a polycarboxylate water reducing agent.

[0054] The flame retardant is a compound of antimony trioxide, magnesium hydroxide, and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0055] The adhesive is epoxy resin.

[0056] The average molecular weight Mw of polyethylene is 4000.

[0057] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, highly porous aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture obtained in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidifying and shaping, demold and dry to obtain a composite layer.

[0058] Example 5

[0059] This example provides a building board with sound insulation function. The building board sequentially includes a wood-based substrate layer, a composite layer and a hard fiber board from top to bottom; the composite layer includes the following raw materials by weight: 34 parts of cement, 18 parts of mica powder, 9 parts of polyethylene, 18 parts of hollow glass beads, 24 parts of shell powder, 18 parts of diatomite, 7 parts of rubber, 23 parts of kaolin, 10 parts of fly ash, 12 parts of highly porous aerogel, 4 parts of water reducing agent, 7 parts of expanded perlite, 6 parts of modified ceramic fiber, 9 parts of glass fiber filaments, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant and 100 parts of water.

[0060] The preparation method of the highly porous aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane, heat to 55 °C, stir for 30 min, continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, and continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash with heptane, add 1 L of trimethylchlorosilane and mix and stir for 12 h to obtain a highly porous aerogel.

[0061] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfonate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, and after filtration, drying and pulverization, obtain the modified ceramic fiber.

[0062] In this example, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1.

[0063] The water reducing agent is a polycarboxylate water reducing agent; the flame retardant is a compound of antimony trioxide, magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0064] The adhesive is epoxy resin; the average molecular weight Mw of polyethylene is 4000.

[0065] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, highly porous aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water into a reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidifying and shaping, demold and dry it to obtain a composite layer.

[0066] Example 6

[0067] This example provides a building board with sound insulation function. The building board sequentially includes a wood substrate layer, a composite layer and a hard fiber board from top to bottom; the composite layer includes the following raw materials by weight: 35 parts of cement, 26 parts of mica powder, 6 parts of polyethylene, 15 parts of hollow glass beads, 20 parts of shell powder, 16 parts of diatomite, 6 parts of rubber, 23 parts of kaolin, 10 parts of fly ash, 13 parts of highly porous aerogel, 4 parts of water reducing agent, 7 parts of expanded perlite, 7 parts of modified ceramic fiber, 8 parts of glass fiber filament, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant and 100 parts of water.

[0068] The preparation method of the highly porous aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane and heat to 55 °C, stir for 30 min, continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash with heptane, add 1 L of trimethylchlorosilane and mix and stir for 12 h to obtain the highly porous aerogel.

[0069] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl 2-methylacrylate, 7 parts by weight of sodium dodecylsulfonate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, and after filtration, drying and crushing, obtain the modified ceramic fiber.

[0070] In this example, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1.

[0071] The water reducing agent is a polycarboxylate water reducing agent; the flame retardant is a compound of antimony trioxide, magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0072] The adhesive is epoxy resin; the average molecular weight Mw of polyethylene is 4000.

[0073] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidification and shaping, demold and dry to obtain a composite layer.

[0074] Example 7

[0075] This example provides a building board with sound insulation function. The building board sequentially includes a wood substrate layer, a composite layer and a hard fiber board from top to bottom; the composite layer includes the following raw materials by weight: 33 parts of cement, 22 parts of mica powder, 7 parts of polyethylene, 19 parts of hollow glass beads, 22 parts of shell powder, 19 parts of diatomite, 7 parts of rubber, 23 parts of kaolin, 13 parts of fly ash, 11 parts of high-porosity aerogel, 4 parts of water reducing agent, 7 parts of expanded perlite, 8 parts of modified ceramic fiber, 4 parts of glass fiber filament, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant and 100 parts of water.

[0076] The preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane, heat to 55 °C, stir for 30 min, continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, and continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash with heptane, add 1 L of trimethylchlorosilane and mix and stir for 12 h to obtain high-porosity aerogel.

[0077] The preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, and after filtration, drying and pulverization, obtain the modified ceramic fiber.

[0078] In this example, the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1.

[0079] The water reducing agent is a polycarboxylate water reducing agent.

[0080] The flame retardant is a compound of antimony trioxide, magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:3:0.5.

[0081] The adhesive is epoxy resin.

[0082] The average molecular weight Mw of polyethylene is 4000.

[0083] The preparation method of the composite material is as follows: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water to the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidifying and shaping, demold and dry to obtain a composite layer.

[0084] Comparative Example 1

[0085] The difference between this comparative example and Example 3 is that high-porosity aerogel is not added.

[0086] Comparative Example 2

[0087] The difference between this comparative example and Example 3 is that the ceramic fiber is not modified.

[0088] Comparative Example 3

[0089] The difference between this comparative example and Example 3 is that the preparation method of the modified ceramic fiber is as follows: Disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, and obtain the modified ceramic fiber after filtration, drying and pulverization.

[0090] Comparative Example 4

[0091] The difference between this comparative example and Example 3 is that the average molecular weight Mw of polyethylene is 10000.

[0092] Comparative Example 5

[0093] The sound-insulating building board in this comparative example sequentially includes a wood substrate layer, a composite layer and a hard fiber board from top to bottom.

[0094] The difference between this comparative example and Example 3 is that for the sound-insulating building board, the building board sequentially includes a wood substrate layer, a composite layer and a hard fiber board from top to bottom; the composite layer includes the following raw materials in parts by weight: 25 parts of cement, 15 parts of mica powder, 15 parts of polyethylene, 12 parts of hollow glass beads, 15 parts of shell powder, 25 parts of diatomite, 3 parts of rubber, 20 parts of kaolin, 5 parts of fly ash, 16 parts of high-porosity aerogel, 3 parts of water reducing agent, 15 parts of expanded perlite, 2 parts of modified ceramic fiber, 12 parts of glass fiber filaments, 4 parts of adhesive, 10 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant and 100 parts of water.

[0095] Comparative Example 6

[0096] In this comparative example, the building board with sound insulation function successively includes a wood base material layer, a composite layer, and a hard fiber board from top to bottom.

[0097] The difference between this comparative example and Example 3 is that the composite layer includes the following raw materials by weight: 38 parts of cement, 35 parts of mica powder, 4 parts of polyethylene, 15 parts of hollow glass beads, 20 parts of shell powder, 13 parts of diatomite, 6 parts of rubber, 23 parts of kaolin, 10 parts of fly ash, 5 parts of high-porosity aerogel, 4 parts of water reducing agent, 7 parts of expanded perlite, 18 parts of modified ceramic fiber, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant, and 100 parts of water.

[0098] Comparative Example 7

[0099] In this comparative example, the building board with sound insulation function successively includes a wood base material layer, a composite layer, and a hard fiber board from top to bottom.

[0100] The difference between this comparative example and Example 3 is that the composite layer includes the following raw materials by weight: 32 parts of cement, 22 parts of mica powder, 6 parts of polyethylene, 15 parts of hollow glass beads, 20 parts of shell powder, 17 parts of diatomite, 28 parts of kaolin, 15 parts of fly ash, 5 parts of high-porosity aerogel, 4 parts of water reducing agent, 7 parts of expanded perlite, 2 parts of modified ceramic fiber, 4 parts of glass fiber filaments, 3 parts of adhesive, 4 parts of wood chips, 2 parts of flame retardant, 3 parts of aluminum silicate, 1 part of dispersant, and 100 parts of water.

[0101] Comparative Example 8

[0102] The difference between this comparative example and Example 3 is that the preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 20 L of tetraethoxysilane, heat to 55 °C, stir for 30 min, continue to add 10 L of 0.05 mol / L oxalic acid aqueous solution and continue to stir for 30 h, cool to 45 °C, continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let stand for 20 h, wash with heptane, add 0.1 L of trimethylchlorosilane and mix and stir for 12 h to obtain high-porosity aerogel.

[0103] Performance Test

[0104] Measure the performance of the building boards prepared in the examples and comparative examples. Refer to the standard DB44 / T 1222-2013 "Inorganic Fireproof and Heat Insulating Boards for Buildings" to detect the combustion performance and flexural strength; refer to the standard GB / T 39526-2020 "Classification and Test Methods for Airborne Sound Insulation Performance of Building Curtains" to measure the sound insulation effect. The specific test results are shown in the following table.

[0105] Table 1 Performance Test Results

[0106] Flexural strength / KPa Combustion performance Sound insulation quantity / dB Example 1 472.6 A1 56 Example 2 476.9 A1 57 Example 3 479.4 A1 59 Example 4 474.8 A1 55 Example 5 470.3 A1 56 Example 6 471.4 A1 58 Example 7 473.5 A1 56 Comparative example 1 400.3 A2 48 Comparative example 2 396.4 A2 46 Comparative example 3 399.6 A1 45 Comparative example 4 435.4 A1 52 Comparative example 5 410.6 A2 47 Comparative example 6 389.5 A2 43 Comparative example 7 393.3 A2 46 Comparative example 8 426.9 A2 51

[0107] It can be seen from Examples 1 to 7 that the building board prepared by the present invention has good flexural strength, flame retardant properties and sound insulation effects.

[0108] It can be seen from Comparative Examples 1 and 8 that the performance of the product is reduced by changing or not adding the high-porosity aerogel.

[0109] It can be seen from comparative examples 2 and 3 that without adding modified ceramic fiber, the comprehensive performance of the product is reduced. The parameters of the ceramic fiber are changed, and the flexural strength and sound insulation are affected.

[0110] It can be seen from Comparative Example 4 that when the average molecular weight of polyethylene changes, both the flexural strength and the sound insulation are affected.

[0111] It can be seen from comparative examples 5-7 that the raw material composition and proportion of the building board are changed, and the comprehensive performance of the product is changed.

[0112] It can be seen from the structures of the above-mentioned embodiments and comparative examples that the building board prepared by the present invention adds a new type of high-porosity aerogel and has high mechanical stability. The composite layer is prepared by compounding with materials such as ceramic fibers, and the building board is bonded with a wood substrate layer and a hard fiberboard, and has good sound insulation, heat preservation and flame retardant effects.

[0113] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A building board with sound insulation function, characterized in that, the building board successively includes a wood substrate layer, a composite layer and a hard fiber board from top to bottom; wherein, the composite layer includes the following raw materials by weight: 6-10 parts of polyethylene, 10-13 parts of high-porosity aerogel, 20-30 parts of mica powder, 15-20 parts of hollow glass beads, 20-30 parts of shell powder, 16-20 parts of diatomite, 6-9 parts of rubber, 23-30 parts of kaolin, 10-20 parts of fly ash, 32-36 parts of cement, 4-6 parts of water reducing agent, 7-11 parts of expanded perlite, 5-9 parts of modified ceramic fiber, 4-9 parts of glass fiber filaments, 3-4 parts of adhesive, 4-8 parts of wood chips, 2-4 parts of flame retardant, 3-7 parts of aluminum silicate, 1-2 parts of dispersant and 100-120 parts of water; The preparation method of the high-porosity aerogel is as follows: Mix 100 L of ethanol and 40 L of tetraethoxysilane, heat the mixture to 55 °C, stir for 30 min, then continue to add 15 L of 0.05 mol / L oxalic acid aqueous solution and stir for 30 h. Cool the mixture to 45 °C, then continue to add 5 L of 25 wt% NH 4 OH aqueous solution, let it stand for 20 h, wash it with heptane, add 1 L of trimethylchlorosilane, and mix and stir for 12 h to obtain the high-porosity aerogel; The preparation method of the modified ceramic fiber is as follows: disperse 100 parts by weight of ceramic fiber in 250 parts by weight of water, add 3 parts by weight of acrylamide, 5 parts by weight of dodecyl methacrylate, 7 parts by weight of sodium dodecyl sulfonate and 0.26 parts by weight of ammonium persulfate, stir and react at 70 °C for 4 h, filter, dry and pulverize to obtain the modified ceramic fiber; the average fiber diameter of the ceramic fiber is 3 - 3.5 μm, the fiber length is 20 mm, and the chemical composition is: 47 wt% of aluminum oxide, 52 wt% of silicon dioxide, and 1 wt% of ZrO 2 1wt%; the water reducing agent is a polycarboxylate water reducing agent; the flame retardant is a compound of antimony trioxide, magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:3:0.

5.

2. The building board with sound insulation function according to claim 1, characterized in that, the adhesive is epoxy resin.

3. The building board with sound insulation function according to claim 1, characterized in that, the average molecular weight Mw of the polyethylene is 4000.

4. The preparation method of the building board as claimed in claim 1, characterized in that, it includes the following steps: (1) Stir the flame retardant, aluminum silicate, polyethylene, rubber, high-porosity aerogel and hollow glass beads evenly to obtain a mixture; (2) Add water into the reaction kettle, heat it to 95 °C, add the remaining raw materials, and stir for 2 h; naturally cool to 35 °C, add the mixture in step (1), and stir for 1 h to obtain a slurry; (3) Pour the slurry into a mold, tamp and scrape it flat, and after solidifying and shaping, demold and dry to obtain the composite layer.

5. The preparation method according to claim 4, characterized in that, it includes the following steps: Composite the wood substrate, polyurethane plastic foam board, composite layer and hard fiber board in a bonded form to obtain a building board with sound insulation function.