Fireproof insulation board for decoration and preparation process thereof

Abstract

The invention relates to the technical field of building materials, in particular to a fireproof insulation board for decoration and a preparation process thereof. The fireproof insulation board is prepared from the following components in parts by weight: 100 to 120 parts of Portland cement, 10 to 20 parts of fly ash, 10 to 25 parts of polyphenyl granules, 0.1 to 1.0 part of polypropylene fiber, 3 to 8 parts of bentonite, 3 to 12 parts of modified aerogel, 0.5 to 1.5 parts of water reducing agent, 0.5 to 3.0 parts of foaming agent and 60 to 80 parts of water. The preparation method comprises the following steps: uniformly stirring water, modified aerogel, polypropylene fibers, a water reducing agent, Portland cement, fly ash, bentonite, polyphenyl granules and a foaming agent to obtain slurry; and pouring the slurry into a mold, pouring, demolding and curing to obtain the fireproof insulation board, which not only has an excellent flame retardant effect, but also has an excellent insulation effect.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a fireproof insulation board for decoration and a preparation process thereof. Background Art

[0002] As a new type of building material, fireproof insulation board is widely used in the field of building decoration and insulation. The insulation materials currently used in my country can be mainly divided into two categories: inorganic and organic. Traditional organic insulation materials, such as polystyrene foam board (EPS), extruded polystyrene foam board (XPS), polyurethane board (PU), etc., although they have good thermal insulation effects, their flammability and the release of a large amount of toxic and harmful gases during combustion bring great safety hazards. Inorganic insulation materials include rock wool, expanded perlite, vitrified microspheres and foam concrete, etc. These materials have Class A non-combustibility, good thermal insulation performance and high strength. However, they generally have the disadvantages of high moisture absorption rate, poor weather resistance and large bulk density. The thermal insulation performance is slightly worse than that of organic materials, and can only be used in areas where thermal insulation and heat insulation requirements are not high.

[0003] Aerogel is a new type of material with a porous structure. Its special structure of low density and high porosity (up to 90%) significantly reduces the material's own mass and thermal conductivity. Compared with traditional thermal insulation materials, aerogel has stronger thermal insulation, waterproof and fireproof properties, and is also better in durability, pressure resistance and air permeability. Adding aerogel to other thermal insulation materials can produce thermal insulation materials with excellent performance.

[0004] Therefore, we propose a fireproof insulation board for decoration and a preparation process thereof. Summary of the invention

[0005] The purpose of the present invention is to provide a fireproof insulation board for decoration and a preparation process thereof, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A preparation process of a fireproof insulation board for decoration and decoration comprises the following steps: Step S1: Mix water, modified aerogel, polypropylene fiber and water reducing agent evenly, add silicate cement, fly ash, bentonite and polystyrene particles, stir evenly, then add foaming agent, stir evenly to obtain slurry; Step S2: pouring the slurry into a mold, and obtaining a fireproof insulation board after pouring, demoulding and curing.

[0007] Furthermore, the fireproof insulation board includes the following components by weight: 100-120 parts of silicate cement, 10-20 parts of fly ash, 10-25 parts of polystyrene particles, 0.1-1.0 parts of polypropylene fiber, 3-8 parts of bentonite, 3-12 parts of modified aerogel, 0.5-1.5 parts of water reducer, 0.5-3.0 parts of foaming agent, and 60-80 parts of water.

[0008] Furthermore, the preparation method of the modified aerogel is as follows: Step A: ultrasonically dispersing sepiolite in a mixed solution of anhydrous ethanol and deionized water, adding 3-aminopropyltriethoxysilane, mixing, reacting at 50-70° C. for 2-4 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: uniformly mixing the aminated sepiolite, the epoxidized flame retardant and the anhydrous ethanol, and reacting them at 20-40° C. for 8-10 hours to obtain the modified sepiolite; Step C: Ultrasonic dispersion of magnesium oxide and modified sepiolite in deionized water to obtain a suspension; adding the suspension to a mixed sol of agar and polyvinyl alcohol, stirring at 95-99° C. for 3-5 hours, condensing and forming at room temperature to obtain a wet gel, and pre-freezing and vacuum freeze-drying to obtain a modified aerogel.

[0009] In the above technical scheme, the surface of sepiolite is modified by 3-aminopropyltriethoxysilane to obtain amino sepiolite, and then the amino and epoxy groups are reacted to combine the amino sepiolite with the epoxide flame retardant, thereby further improving the flame retardant properties of the sepiolite; magnesium hydroxide is in situ generated in the (AG) / polyvinyl alcohol (PVA) sol matrix by hydrating magnesium oxide to avoid the agglomeration of magnesium hydroxide, and modified sepiolite is introduced into the sol matrix, and modified aerogel is obtained by freeze-drying technology, and the magnesium hydroxide and modified sepiolite work together to enhance the mechanical properties of the polymer matrix, so that the prepared fireproof insulation board has higher strength, toughness and compressive resistance.

[0010] Furthermore, in step A, the mass ratio of sepiolite, anhydrous ethanol, deionized water and 3-aminopropyltriethoxysilane is 1:(15-20):(3-5):(2-3).

[0011] Furthermore, in step B, the mass ratio of the amination sepiolite, the epoxidized flame retardant and the anhydrous ethanol is 1:(2-4):(15-20).

[0012] Furthermore, in step C, the ratio of magnesium oxide, modified sepiolite and deionized water is 1:(1-3):(15-30).

[0013] Furthermore, in step C, the mass ratio of the suspension to the mixed sol is 1:(3-5).

[0014] Furthermore, in step C, the concentration of agar in the mixed sol is 1.5-2.0wt%, the concentration of polyvinyl alcohol is 1.0-1.5wt%, and the solvent is deionized water.

[0015] Furthermore, the preparation method of the epoxidized flame retardant is as follows: Step (1): Under nitrogen protection, melamine and pyridine are mixed evenly at 40-50° C., thioglycolic acid and dicyclohexylcarbodiimide are added and mixed evenly, and the mixture is reacted at 55-65° C. for 1-3 hours. After the reaction is completed, the mixture is filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate; Step (2): Under nitrogen protection, the intermediate, 4-formylphenylboronic acid and anhydrous ethanol are mixed evenly, refluxed at 80-90° C. for 2-4 hours, DOPO is added, and the reaction is continued for 6-8 hours. After filtering, washing and drying, a flame retardant is obtained; Step (3): Evenly mix the flame retardant, 4-vinylbenzyl glycidyl ether and the photoinitiator, and react them under ultraviolet light for 2-3 hours to obtain an epoxidized flame retardant.

[0016] Furthermore, in the step (1), the mass ratio of melamine, pyridine, thioglycolic acid and dicyclohexylcarbodiimide is 1: (6-8): (0.5-0.6): (1.2-1.5).

[0017] Furthermore, in the step (2), the mass ratio of the intermediate, 4-formylphenylboronic acid and anhydrous ethanol is 1:(2-4):(15-20).

[0018] Furthermore, in step (2), the mass of DOPO is 3-4 times the mass of the intermediate.

[0019] Furthermore, in step (3), the mass ratio of the flame retardant, 4-vinylbenzyl glycidyl ether and the photoinitiator is 1:(3-5):(0.1-0.3).

[0020] Furthermore, the photoinitiator is 2-hydroxy-2-methylpropiophenone.

[0021] Furthermore, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.

[0022] Furthermore, the curing time is 7-10 days.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. A fireproof insulation board for decoration and a preparation process thereof of the present invention comprises the following steps: an amidation reaction is carried out between the amino group in melamine and the carboxyl group in thioglycolic acid to introduce a thiol group and obtain an intermediate; the remaining amino group in melamine is then reacted with the aldehyde group in 4-formylphenylboronic acid to generate a C=N bond, which can further react with the PH bond in DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) to obtain a flame retardant containing nitrogen, boron and phosphorus elements, which not only improves the flame retardant properties of the material, but also significantly reduces the release of harmful gases generated during combustion, thereby effectively improving fire safety; finally, a thiol-ene click reaction is carried out between the thiol group in the flame retardant and 4-vinylbenzyl glycidyl ether to introduce an epoxy group and obtain a reactive flame retardant, i.e., an epoxidized flame retardant.

[0024] 2. A fireproof insulation board for decoration and its preparation process of the present invention, surface modification treatment of sepiolite by 3-aminopropyltriethoxysilane to obtain amino sepiolite, and then the reaction of amino and epoxy groups is used to successfully introduce high-efficiency flame retardant components into sepiolite, further improving the flame retardant properties of sepiolite; flower cluster-like magnesium hydroxide is successfully generated in situ in the three-dimensional porous skeleton of (AG) / polyvinyl alcohol (PVA) by hydration of magnesium oxide, avoiding the agglomeration of magnesium hydroxide, and introducing modified sepiolite into the sol matrix, and preparing modified aerogel by freeze drying technology. Among them, magnesium hydroxide and modified sepiolite as inorganic fillers can provide abundant stress sites for the aerogel matrix and improve the density of the composite aerogel. At the same time, there is a hydrogen bond between magnesium hydroxide and modified sepiolite and the polymer matrix, which has a high binding force, can enhance the skeleton strength of the aerogel, resist the collapse caused by external forces, not only greatly improve the mechanical properties and water resistance of the aerogel, but also have excellent flame retardant effect. The present invention adopts aerogel, cement-based gelling material and expandable polystyrene particles as main raw materials to prepare a fireproof and heat-insulating board which not only has excellent fireproof and heat-insulating properties, but also has excellent strength and durability, can maintain stable performance for a long time, and prolongs service life. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In this embodiment, silicate cement: P·O 42.5R grade cement; fly ash: first-grade fly ash, particle size is 200-300 mesh, sourced from Jining Hengzhi New Building Materials Co., Ltd.; polystyrene particles: particle size is 3-5 mm, sourced from Dongguan Jiabairui New Energy Technology Co., Ltd.; water reducer: model TD-JSS, water reduction rate 25%, sourced from Tuoda (Shandong) New Materials Technology Industry Group Co., Ltd.; polypropylene fiber: length 10 mm, diameter 2.5 μm, sourced from Tuoda (Shandong) New Materials Technology Industry Group Co., Ltd.; bentonite: particle size is 1250 mesh, model SH-01, sourced from Maoming Dianbai District Shangxing Chemical Technology Co., Ltd.; foaming agent: animal protein foaming agent, model FP-50; sepiolite: powder, particle size is 2000 mesh, sourced from Tuoyi New Materials (Guangzhou) Co., Ltd.; magnesium oxide: particle size is 30-50 nm, sourced from Zhejiang Zhiti Nano Micro New Materials Co., Ltd.; polyvinyl alcohol and agar are both sourced from Sinopharm Chemical Reagent Co., Ltd., analytical grade.

[0027] In the following examples and comparative examples, 1 portion is equal to 20 g.

[0028] Embodiment 1: A preparation process of a fireproof insulation board for decoration and decoration, comprising the following processes: Step S1: 60 parts of water, 3 parts of modified aerogel, 0.1 parts of polypropylene fiber and 0.5 parts of water reducing agent are mixed evenly, 100 parts of Portland cement, 10 parts of fly ash, 3 parts of bentonite and 10 parts of polystyrene particles are added, and stirred evenly, and then 0.5 parts of foaming agent are added, and stirred evenly to obtain slurry; Step S2: pouring the slurry into a mold, casting, demoulding, and curing for 7 days to obtain a fireproof insulation board; The preparation method of modified aerogel is as follows: Step A: ultrasonically dispersing 3 parts of sepiolite in a mixed solution of 45 parts of anhydrous ethanol and 9 parts of deionized water, adding 6 parts of 3-aminopropyltriethoxysilane, mixing, reacting at 50° C. for 2 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: 3 parts of amination sepiolite, 6 parts of epoxidized flame retardant and 45 parts of anhydrous ethanol were mixed evenly, and reacted at 20° C. for 8 hours to obtain modified sepiolite; Step C: ultrasonically dispersing 3 parts of magnesium oxide and 3 parts of modified sepiolite in 45 parts of deionized water to obtain a suspension; adding 45 parts of the suspension to 135 parts of a mixed sol of 1.5wt% agar and 1.0wt% polyvinyl alcohol, stirring at 95°C for 3h, condensing and forming at room temperature to obtain a wet gel, and pre-freezing for 24h and vacuum freeze-drying for 60h to obtain a modified aerogel; The preparation method of the epoxidized flame retardant is as follows: Step (1): Under nitrogen protection, 6 parts of melamine and 36 parts of pyridine are mixed at 40°C, 3 parts of thioglycolic acid and 7.2 parts of dicyclohexylcarbodiimide are added and mixed, and the mixture is reacted at 55°C for 1 hour. After the reaction is completed, the mixture is filtered, distilled under reduced pressure, and dried in vacuum to obtain an intermediate; Step (2): Under nitrogen protection, 6 parts of the intermediate, 12 parts of 4-formylphenylboronic acid and 30 parts of anhydrous ethanol were mixed evenly, and refluxed at 80°C for 2 hours, 18 parts of DOPO were added and mixed, and the reaction was continued for 6 hours. After filtering, washing and drying, a flame retardant was obtained; Step (3): 6 parts of flame retardant, 18 parts of 4-vinylbenzyl glycidyl ether and 0.6 parts of photoinitiator are mixed evenly, and reacted under ultraviolet light (power of 100 W) for 2 hours to obtain an epoxidized flame retardant.

[0029] Embodiment 2: A preparation process of a fireproof insulation board for decoration and decoration, comprising the following process: Step S1: 70 parts of water, 8 parts of modified aerogel, 0.5 parts of polypropylene fiber and 1.0 parts of water reducing agent are mixed evenly, 110 parts of Portland cement, 15 parts of fly ash, 5 parts of bentonite and 20 parts of polystyrene particles are added, and stirred evenly, and then 2 parts of foaming agent are added, and stirred evenly to obtain slurry; Step S2: pouring the slurry into a mold, casting, demoulding, and curing for 7 days to obtain a fireproof insulation board; The preparation method of modified aerogel is as follows: Step A: ultrasonically dispersing 8 parts of sepiolite in a mixed solution of 144 parts of anhydrous ethanol and 32 parts of deionized water, adding 20 parts of 3-aminopropyltriethoxysilane, mixing, reacting at 60° C. for 3 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: 8 parts of amination sepiolite, 24 parts of epoxidized flame retardant and 144 parts of anhydrous ethanol were mixed evenly, and reacted at 30° C. for 9 hours to obtain modified sepiolite; Step C: ultrasonically dispersing 4 parts of magnesium oxide and 8 parts of modified sepiolite in 72 parts of deionized water to obtain a suspension; adding 72 parts of the suspension to a mixed sol of 288 parts of 1.8wt% agar and 1.2wt% polyvinyl alcohol, stirring at 98°C for 4 hours, condensing and forming at room temperature to obtain a wet gel, and pre-freezing for 24 hours and vacuum freeze-drying for 60 hours to obtain a modified aerogel; The preparation method of the epoxidized flame retardant is as follows: Step (1): Under nitrogen protection, 24 parts of melamine and 168 parts of pyridine are mixed at 45°C, 13.2 parts of thioglycolic acid and 32 parts of dicyclohexylcarbodiimide are added and mixed, and the mixture is reacted at 60°C for 2 hours. After the reaction is completed, the mixture is filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate; Step (2): Under nitrogen protection, 24 parts of the intermediate, 72 parts of 4-formylphenylboronic acid and 450 parts of anhydrous ethanol were mixed evenly, and refluxed at 85°C for 3 hours, 84 parts of DOPO were added and mixed, and the reaction was continued for 7 hours. After filtering, washing and drying, a flame retardant was obtained; Step (3): 24 parts of flame retardant, 96 parts of 4-vinylbenzyl glycidyl ether and 4.8 parts of photoinitiator are mixed evenly, and reacted under ultraviolet light (power of 100 W) for 2.5 hours to obtain an epoxidized flame retardant.

[0030] Embodiment 3: A preparation process of a fireproof insulation board for decoration, comprising the following process: Step S1: 80 parts of water, 12 parts of modified aerogel, 1.0 part of polypropylene fiber and 1.5 parts of water reducing agent are mixed evenly, 120 parts of Portland cement, 20 parts of fly ash, 8 parts of bentonite and 25 parts of polystyrene particles are added, and stirred evenly, and then 3.0 parts of foaming agent are added, and stirred evenly to obtain slurry; Step S2: pouring the slurry into a mold, casting, demoulding, and curing for 7 days to obtain a fireproof insulation board; The preparation method of modified aerogel is as follows: Step A: ultrasonically dispersing 12 parts of sepiolite in a mixed solution of 240 parts of anhydrous ethanol and 60 parts of deionized water, adding 36 parts of 3-aminopropyltriethoxysilane, mixing, reacting at 70° C. for 4 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: 12 ​​parts of amination sepiolite, 48 parts of epoxidized flame retardant and 240 parts of anhydrous ethanol were mixed evenly, and reacted at 40° C. for 10 hours to obtain modified sepiolite; Step C: ultrasonically dispersing 4 parts of magnesium oxide and 12 parts of modified sepiolite in 120 parts of deionized water to obtain a suspension; adding 120 parts of the suspension to 600 parts of a mixed sol of 2.0 wt% agar and 1.5 wt% polyvinyl alcohol, stirring at 99° C. for 5 hours, condensing and forming at room temperature to obtain a wet gel, and pre-freezing for 24 hours and vacuum freeze-drying for 60 hours to obtain a modified aerogel; The preparation method of the epoxidized flame retardant is as follows: Step (1): Under nitrogen protection, 20 parts of melamine and 160 parts of pyridine are mixed at 50°C, 12 parts of thioglycolic acid and 30 parts of dicyclohexylcarbodiimide are added and mixed, and the mixture is reacted at 65°C for 3 hours. After the reaction is completed, the mixture is filtered, distilled under reduced pressure, and dried in vacuum to obtain an intermediate; Step (2): Under nitrogen protection, 20 parts of the intermediate, 80 parts of 4-formylphenylboronic acid and 400 parts of anhydrous ethanol were mixed evenly, refluxed at 90° C. for 4 hours, 80 parts of DOPO were added and mixed, and the reaction was continued for 8 hours. After filtering, washing and drying, a flame retardant was obtained; Step (3): 60 parts of flame retardant, 300 parts of 4-vinylbenzyl glycidyl ether and 18 parts of photoinitiator are mixed evenly, and reacted under ultraviolet light (power of 100 W) for 3 hours to obtain an epoxidized flame retardant.

[0031] Comparative Example 1: A preparation process of a fireproof insulation board for decoration, comprising the following processes: The preparation method of modified aerogel is as follows: 4 parts of magnesium oxide were ultrasonically dispersed in 72 parts of deionized water to obtain a suspension; 72 parts of the suspension were added to 288 parts of a mixed sol of 1.8 wt% agar and 1.2 wt% polyvinyl alcohol, stirred at 98°C for 4 hours, and condensed at room temperature to obtain a wet gel, which was pre-frozen for 24 hours and vacuum freeze-dried for 60 hours to obtain a modified aerogel; Compared with Example 2, no modified sepiolite is added to the modified aerogel of Comparative Example 1, and the other steps are the same as those of Example 2.

[0032] Comparative Example 2: A preparation process of a fireproof insulation board for decoration, comprising the following processes: The preparation method of modified aerogel is as follows: 4 parts of magnesium oxide and 8 parts of sepiolite were ultrasonically dispersed in 72 parts of deionized water to obtain a suspension; 72 parts of the suspension were added to a mixed sol of 288 parts of 1.8wt% agar and 1.2wt% polyvinyl alcohol, stirred at 98°C for 4 hours, and condensed at room temperature to obtain a wet gel, which was pre-frozen for 24 hours and vacuum freeze-dried for 60 hours to obtain a modified aerogel; Compared with Example 2, the modified sepiolite in Comparative Example 2 is replaced with sepiolite of the same mass, and the other steps are the same as those in Example 2.

[0033] Comparative Example 3: A preparation process of a fireproof insulation board for decoration, comprising the following processes: The preparation method of modified aerogel is as follows: Step A: ultrasonically dispersing 8 parts of sepiolite in a mixed solution of 144 parts of anhydrous ethanol and 32 parts of deionized water, adding 20 parts of 3-aminopropyltriethoxysilane, mixing, reacting at 60° C. for 3 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: 8 parts of amination sepiolite, 24 parts of epoxidized flame retardant and 144 parts of anhydrous ethanol were mixed evenly, and reacted at 30° C. for 9 hours to obtain modified sepiolite; Step C: 8 parts of magnesium oxide and 4 parts of modified sepiolite are ultrasonically dispersed in 72 parts of deionized water to obtain a suspension; 72 parts of the suspension are added to a mixed sol of 288 parts of 1.8wt% agar and 1.2wt% polyvinyl alcohol, stirred at 98°C for 4 hours, and condensed at room temperature to obtain a wet gel, which is pre-frozen for 24 hours and vacuum freeze-dried for 60 hours to obtain a modified aerogel; Compared with Example 2, the mass ratio of magnesium oxide to modified sepiolite in Comparative Example 3 is 2:1, and the other steps are the same as those in Example 2.

[0034] Experiment: Take the fireproof insulation boards obtained in Examples 1-3 and Comparative Examples 1-3, prepare samples, test their properties respectively and record the test results: The fire resistance level was determined according to GB / T 8624‑2012 “Classification of Combustion Performance of Building Materials and Products”. The compressive strength was determined according to JC / T 2357-2016, with a sample size of 100mm×100mm×100mm and a loading speed of 0.25kN / s. The thermal conductivity of the samples was determined by the heat flow meter method according to GB / T 10295-2008.

[0035] The test results are as follows: According to the data in the above table, we can clearly draw the following conclusions: 1. Compared with Examples 1-3, the fire resistance level, compressive strength and thermal conductivity of the products obtained in Comparative Examples 1 and 2 are all reduced, indicating that the present invention can significantly improve the fire resistance, thermal insulation and thermal conductivity of the fireproof insulation board through the synergistic effect of modified sepiolite and magnesium hydroxide; compared with sepiolite, modified sepiolite has better flame retardant effect and more active sites, thereby effectively improving the flame retardant and mechanical properties of the material.

[0036] 2. Compared with Examples 1-3, the fire retardancy, compressive strength and thermal conductivity of the product obtained in Comparative Example 3 are all reduced, indicating that the modified aerogel prepared by the present invention is affected by its component ratio. By selecting the component ratio within the said range, a material with excellent flame retardant and thermal insulation properties can be prepared.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A preparation process of a fireproof and heat-insulating board for decoration, characterized in that: The steps include: Step S1: Mix water, modified aerogel, polypropylene fiber and water reducing agent evenly, add silicate cement, fly ash, bentonite and polystyrene particles, stir evenly, then add foaming agent, stir evenly to obtain slurry; Step S2: pouring the slurry into a mold, and obtaining a fireproof insulation board after pouring, demoulding and curing.

2. The preparation process of a fireproof and heat-insulating board for decoration according to claim 1, characterized in that: The fireproof insulation board includes the following components by weight: 100-120 parts of silicate cement, 10-20 parts of fly ash, 10-25 parts of polystyrene particles, 0.1-1.0 parts of polypropylene fiber, 3-8 parts of bentonite, 3-12 parts of modified aerogel, 0.5-1.5 parts of water reducer, 0.5-3.0 parts of foaming agent, and 60-80 parts of water.

3. The preparation process of a fireproof and heat-insulating board for decoration and decoration according to claim 2, characterized in that: The preparation method of the modified aerogel is as follows: Step A: ultrasonically dispersing sepiolite in a mixed solution of anhydrous ethanol and deionized water, adding 3-aminopropyltriethoxysilane, mixing, reacting at 50-70° C. for 2-4 hours, filtering, centrifuging, and drying to obtain amination sepiolite; Step B: uniformly mixing the aminated sepiolite, the epoxidized flame retardant and the anhydrous ethanol, and reacting them at 20-40° C. for 8-10 hours to obtain the modified sepiolite; Step C: Ultrasonic dispersion of magnesium oxide and modified sepiolite in deionized water to obtain a suspension; adding the suspension to a mixed sol of agar and polyvinyl alcohol, stirring at 95-99° C. for 3-5 hours, condensing and forming at room temperature to obtain a wet gel, and pre-freezing and vacuum freeze-drying to obtain a modified aerogel.

4. The process for preparing a fireproof and heat-insulating board for decoration according to claim 3, characterized in that: In the step A, the mass ratio of sepiolite, anhydrous ethanol, deionized water and 3-aminopropyltriethoxysilane is 1:(15-20):(3-5):(2-3).

5. The preparation process of a fireproof and heat-insulating board for decoration and decoration according to claim 3, characterized in that: In the step B, the mass ratio of the amination sepiolite, the epoxidized flame retardant and the anhydrous ethanol is 1:(2-4):(15-20).

6. The process for preparing a fireproof and heat-insulating board for decoration according to claim 5, characterized in that: The preparation method of the epoxidized flame retardant is as follows: Step (1): Under nitrogen protection, melamine and pyridine are mixed evenly at 40-50° C., thioglycolic acid and dicyclohexylcarbodiimide are added and mixed evenly, and the mixture is reacted at 55-65° C. for 1-3 hours. After the reaction is completed, the mixture is filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate; Step (2): Under nitrogen protection, the intermediate, 4-formylphenylboronic acid and anhydrous ethanol are mixed evenly, refluxed at 80-90° C. for 2-4 hours, DOPO is added, and the reaction is continued for 6-8 hours. After filtering, washing and drying, a flame retardant is obtained; Step (3): Evenly mix the flame retardant, 4-vinylbenzyl glycidyl ether and the photoinitiator, and react them under ultraviolet light for 2-3 hours to obtain an epoxidized flame retardant.

7. The process for preparing a fireproof and heat-insulating board for decoration according to claim 6, characterized in that: In the step (3), the mass ratio of the flame retardant, 4-vinylbenzyl glycidyl ether and the photoinitiator is 1:(3-5):(0.1-0.3).

8. The process for preparing a fireproof and heat-insulating board for decoration according to claim 3, characterized in that: In step C, the concentration of agar in the mixed sol is 1.5-2.0wt%, the concentration of polyvinyl alcohol is 1.0-1.5wt%, and the solvent is deionized water.

9. The process for preparing a fireproof and heat-insulating board for decoration according to claim 2, characterized in that: The water reducing agent is a polycarboxylic acid high efficiency water reducing agent.

10. A fireproof insulation board for decoration made according to the preparation process according to any one of claims 1 to 9.

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