Fireproof and heat-insulating board and preparation method thereof

Abstract

The application relates to the technical field of building materials, and discloses a fireproof heat insulation plate and a preparation method thereof. The fireproof heat insulation plate comprises a fireproof heat insulation layer and metal plates arranged on the two sides of the fireproof heat insulation layer; the fireproof heat insulation layer comprises the following components by weight: 50-60 parts of aluminum silicate fiber, 30-40 parts of glass fiber, 10-15 parts of modified hollow glass microbeads and 6-8 parts of a bonding agent; the modified hollow glass microbeads are obtained by modifying hollow glass microbeads by 4-aminobenzoic acid ethyl ester. The technical scheme solves the problem of poor heat insulation performance of the fireproof heat insulation plate in the related art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a fireproof heat insulation plate and a preparation method thereof. BACKGROUND

[0002] The fireproof heat insulation plate, as a composite plate with fireproof and heat insulation functions, is widely used in many fields such as building, industry and transportation. For the fireproof heat insulation plate, the heat insulation capacity is the core index for measuring its performance. In the event of fire, excellent heat insulation effect can effectively block high temperature from passing through the plate, avoid the object on the other side from being ignited, and prevent personnel from being burned by high temperature. In the industrial heat preservation scene, strong heat insulation can greatly reduce heat loss and significantly improve energy utilization efficiency. However, the fireproof heat insulation plate in the prior art still has obvious deficiencies in heat insulation capacity. Therefore, it is necessary to propose a fireproof heat insulation plate with high heat insulation capacity and a preparation method thereof. SUMMARY

[0003] The present application proposes a fireproof heat insulation plate and a preparation method thereof, which solves the problem of poor heat insulation performance of the fireproof heat insulation plate in the related art.

[0004] The technical scheme of the present application is as follows:

[0005] The present application proposes a fireproof heat insulation plate, which comprises a fireproof heat insulation layer and metal plates arranged on both sides of the fireproof heat insulation layer. The fireproof heat insulation layer comprises the following components by weight: 50-60 parts of aluminum silicate fiber, 30-40 parts of glass fiber, 10-15 parts of modified hollow glass microspheres and 6-8 parts of a binder. The modified hollow glass microspheres are obtained by modifying hollow glass microspheres with 4-aminophenylacetic acid ethyl ester.

[0006] As a further technical scheme, the mass ratio of 4-aminophenylacetic acid ethyl ester to hollow glass microspheres in the modified hollow glass microspheres is 4-7:105, for example, it can be 4:105, 1:21, 2:35, 1:15, and preferably 2:35.

[0007] When the mass ratio of the ethyl 4-aminobenzoate and the hollow glass microspheres in the fireproof and heat insulation plate is less than 4-7:105, the amount of the ethyl 4-aminobenzoate is insufficient to fully cover the surface of the hollow glass microspheres, resulting in poor dispersibility of the hollow glass microspheres and failing to fully improve the heat insulation performance of the fireproof and heat insulation plate; when the mass ratio of the ethyl 4-aminobenzoate and the hollow glass microspheres is greater than 4-7:105, the excess ethyl 4-aminobenzoate will form a redundant coating layer on the surface of the hollow glass microspheres, resulting in re-agglomeration of the hollow glass microspheres; when the mass ratio of the ethyl 4-aminobenzoate and the hollow glass microspheres is within the range of 4-7:105, the modifier can uniformly cover the surface of the hollow glass microspheres, improving the dispersibility of the hollow glass microspheres in the fireproof and heat insulation layer, and further improving the heat insulation capacity of the fireproof and heat insulation layer.

[0008] As a further technical solution, the preparation method of the modified hollow glass microspheres comprises the following steps: dispersing the ethyl 4-aminobenzoate in anhydrous ethanol, then adding the hollow glass microspheres, mixing at 30-50 DEG C, and drying to obtain the modified hollow glass microspheres.

[0009] As a further technical solution, the mass-volume ratio of the hollow glass microspheres to anhydrous ethanol is 1g:12mL.

[0010] As a further technical solution, the raw material of the glass fiber comprises the following components by weight: 80-85 parts of waste glass, 6-8 parts of borax, 10-15 parts of quartz sand, 1-4 parts of soda ash, and 2-4 parts of limestone.

[0011] As a further technical solution, the preparation method of the glass fiber comprises the following steps: mixing the raw material of the glass fiber, heating to melting to obtain a glass liquid, and introducing the glass liquid into a drawing process to make the glass fiber.

[0012] As a further technical solution, the raw material of the aluminum silicate fiber comprises the following components by weight: 50-70 parts of coal gangue, 25-30 parts of aluminum oxide, 12-15 parts of quartz sand, and 2-4 parts of sodium oxide.

[0013] As a further technical solution, the preparation method of the aluminum silicate fiber comprises the following steps: mixing the raw material of the aluminum silicate fiber, heating to melting to obtain an aluminum silicate liquid, and introducing the aluminum silicate liquid into a drawing process to make the aluminum silicate fiber.

[0014] As a further technical solution, the diameter of the hollow glass microspheres is 10-100pm.

[0015] As a further technical solution, the binder is composed of silica sol, polyvinyl alcohol, 3-bromo-1-propanol, and water.

[0016] The adhesive of the fireproof and heat insulation board is composed of silica sol, polyvinyl alcohol, 3-bromo-1-propanol and water, wherein the 3-bromo-1-propanol can improve the bonding capacity and the flame retardant property at the same time: the hydroxyl in the 3-bromo-1-propanol molecule can form hydrogen bonds with the active groups on the surfaces of the silica sol, the polyvinyl alcohol and the glass fiber, the aluminum silicate fiber and other components, so as to further enhance the overall bonding strength of the fireproof and heat insulation layer; at the same time, the bromine free radicals generated by the decomposition of bromine element at high temperature can capture the active free radicals in combustion, so as to interrupt the chain reaction of combustion, and further improve the flame retardant property of the fireproof and heat insulation layer.

[0017] As a further technical solution, the mass ratio of the silica sol, the polyvinyl alcohol and the 3-bromo-1-propanol in the raw material of the adhesive is 91:6:3~5, for example, it can be 91:6:3, 91:6:4, 91:6:5, and preferably 91:6:4.

[0018] As a further technical solution, the mass ratio of the silica sol, the polyvinyl alcohol, the 3-bromo-1-propanol and the water in the raw material of the adhesive is 3:1.

[0019] As a further technical solution, the metal plate is an aluminum plate.

[0020] The application further provides a preparation method of the fireproof and heat insulation board, which comprises the following steps:

[0021] S1, uniformly mixing aluminum silicate fibers, glass fibers and modified hollow glass microspheres, then adding an adhesive, pressing, curing to obtain a fireproof and heat insulation layer;

[0022] S2, compounding the fireproof and heat insulation layer with two metal plates to obtain the fireproof and heat insulation board.

[0023] As a further technical solution, in step S1, the curing temperature is 130~150℃, for example, it can be 130℃, 140℃, 150℃, and preferably 140℃.

[0024] The working principle and beneficial effects of the application are as follows:

[0025] The fireproof heat insulation plate prepared by the application significantly improves the heat insulation capacity of the fireproof heat insulation plate by adding the hollow glass microbeads modified by 4-aminoethyl phenylacetate. In the preparation of the fireproof heat insulation plate, the prior art often adds hollow glass microbeads with a lower thermal conductivity as a filler to improve the heat insulation capacity, but the hollow glass microbeads are prone to agglomeration, resulting in uneven distribution in the plate and the heat insulation effect cannot be fully played. The application adopts 4-aminoethyl phenylacetate to modify the surface of the hollow glass microbeads, which can effectively improve the agglomeration phenomenon and make the hollow glass microbeads more uniformly dispersed in the fireproof heat insulation plate. The modified hollow glass microbeads can be uniformly distributed in the plate, significantly enhancing the blocking effect of heat transfer, and finally further improving the overall heat insulation capacity of the fireproof heat insulation plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below in combination with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor also fall within the scope of protection of the application.

[0027] In the following examples and comparative examples, the waste glass consists of the following components by weight percentage: 72.4% SiO2, 10.6% CaO and 12.1% Na2O, 3.9% MgO, 0.53% Al2O3, 0.35% Fe2O3, and the rest is impurities; borax, product number SBGJ07, purchased from Shandong Shengbang International Trade Co., Ltd.; quartz sand, product number YH-1, purchased from Shijiazhuang Yi Heng Mineral Products Co., Ltd.; limestone, product number SHS13, purchased from Zibo Cunshan Mineral Products Co., Ltd.; coal gangue, product number 963, purchased from Lingshou County Yunshi Mineral Product Processing Factory; aluminum oxide, product number A30G, purchased from Jiangsu Tianxing New Material Co., Ltd.; polyvinyl alcohol, model PVA-1788; hollow glass microbeads, particle size 20 μm; the content of silicon dioxide in silica sol is 40 wt%; aluminum plate, thickness 0.3 mm, purchased from Shandong Jin Hui Aluminum Co., Ltd.

[0028] Example 1

[0029] A preparation method of a fireproof heat insulation plate, comprising the following steps:

[0030] S1, uniformly mixing 50 parts of aluminum silicate fiber, 30 parts of glass fiber and 10 parts of modified hollow glass microbeads, adding 6 parts of adhesive, pressing, and curing at 140℃ to obtain a fireproof heat insulation layer;

[0031] S2, compounding the fireproof heat insulation layer with aluminum plates on both sides to obtain a fireproof heat insulation plate;

[0032] The raw material of the glass fiber comprises the following components in parts by weight: 80 parts of waste glass, 6 parts of borax, 10 parts of quartz sand, 1 part of soda ash, and 2 parts of limestone; the preparation method of the glass fiber comprises the following steps: uniformly mixing the raw material of the glass fiber, heating to melting, obtaining a glass liquid, introducing the glass liquid into a drawing process, and preparing glass fibers with a diameter of 7 microns;

[0033] The raw material of the aluminum silicate fiber comprises the following components in parts by weight: 50 parts of coal gangue, 25 parts of aluminum oxide, 12 parts of quartz sand, and 2 parts of sodium oxide; the preparation method of the aluminum silicate fiber comprises the following steps: uniformly mixing the raw material of the aluminum silicate fiber, heating to melting, obtaining an aluminum silicate liquid, introducing the aluminum silicate liquid into a drawing process, and preparing aluminum silicate fibers with a diameter of 7 microns;

[0034] The preparation method of the modified hollow glass microsphere comprises the following steps: dispersing 4-aminoethyl phenylacetate in anhydrous ethanol, then adding hollow glass microspheres, mixing at 40℃ for 4h, and drying to obtain modified hollow glass microspheres; wherein the mass ratio of 4-aminoethyl phenylacetate and hollow glass microspheres is 4:105; the mass-volume ratio of hollow glass microspheres to anhydrous ethanol is 1g:12mL;

[0035] The binder is composed of silica sol, polyvinyl alcohol, 3-bromo-1-propanol, and water; the mass ratio of silica sol, polyvinyl alcohol, and 3-bromo-1-propanol in the raw material of the binder is 91:6:3; the mass ratio of silica sol, polyvinyl alcohol, 3-bromo-1-propanol, and water is 3:1.

[0036] Example 2

[0037] Compared with example 1, the difference of example 2 is only that the preparation method of the fireproof and heat insulation plate in this embodiment comprises the following steps:

[0038] S1, uniformly mixing 55 parts of aluminum silicate fiber, 35 parts of glass fiber, and 13 parts of modified hollow glass microspheres, adding 7 parts of binder, pressing, and curing at 140℃ to obtain a fireproof and heat insulation layer;

[0039] S2, compounding the fireproof and heat insulation layer with aluminum plates on both sides to obtain a fireproof and heat insulation plate;

[0040] The raw material of the glass fiber comprises the following components in parts by weight: 82 parts of waste glass, 7 parts of borax, 13 parts of quartz sand, 2 parts of soda ash, and 3 parts of limestone;

[0041] The raw material of the aluminum silicate fiber comprises the following components in parts by weight: 60 parts of coal gangue, 28 parts of aluminum oxide, 13 parts of quartz sand, and 3 parts of sodium oxide.

[0042] Example 3

[0043] The difference between Example 3 and Example 1 is only that the preparation method of the fireproof and thermal insulation board in the present example comprises the following steps:

[0044] S1, 60 parts of aluminum silicate fiber, 40 parts of glass fiber, 15 parts of modified hollow glass microsphere are mixed uniformly, 8 parts of adhesive is added, pressed, and cured at 140℃ to obtain a fireproof and thermal insulation layer;

[0045] S2, the fireproof and thermal insulation layer is compounded with aluminum plates on both sides to obtain a fireproof and thermal insulation board;

[0046] The raw materials of the glass fiber include the following components by weight: 85 parts of waste glass, 8 parts of borax, 15 parts of quartz sand, 4 parts of soda ash, and 4 parts of limestone;

[0047] The raw materials of the aluminum silicate fiber include the following components by weight: 70 parts of coal gangue, 30 parts of alumina, 15 parts of quartz sand, and 4 parts of sodium oxide.

[0048] Example 4

[0049] The difference between Example 4 and Example 3 is only that the mass ratio of 4-aminophenylacetic acid ethyl ester to hollow glass microsphere in the modified hollow glass microsphere in the present example is 2:35.

[0050] Example 5

[0051] The difference between Example 5 and Example 3 is only that the mass ratio of 4-aminophenylacetic acid ethyl ester to hollow glass microsphere in the modified hollow glass microsphere in the present example is 1:15.

[0052] Example 6

[0053] The difference between Example 6 and Example 3 is only that the mass ratio of silica sol, polyvinyl alcohol, and 3-bromo-1-propanol in the raw materials of the adhesive in the present example is 91:6:4.

[0054] Example 7

[0055] The difference between Example 7 and Example 3 is only that the mass ratio of silica sol, polyvinyl alcohol, and 3-bromo-1-propanol in the raw materials of the adhesive in the present example is 91:6:5.

[0056] Example 8

[0057] The difference between Example 8 and Example 3 is only that the adhesive in the present example is composed of silica sol, polyvinyl alcohol, and water; the mass ratio of silica sol and polyvinyl alcohol in the raw materials of the adhesive is 91:6; and the mass ratio of silica sol, polyvinyl alcohol, and water is 3:1.

[0058] Comparative Example 1

[0059] The difference between Comparative Example 1 and Example 3 is that, in the present comparative example, the modified hollow glass microspheres are replaced by an equal amount of hollow glass microspheres.

[0060] The fireproof thermal insulation layer prepared in Examples 1-8 and Comparative Example 1 is tested according to the following method:

[0061] 1. Thermal insulation performance test: After the fireproof thermal insulation layer is prepared into a sample with a size of 200 mm x 600 mm x 200 mm, the thermal conductivity of the fireproof thermal insulation layer is tested according to the test method specified in GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Thermal Insulation Materials - Guarded Hot Plate Method".

[0062] 2. Flame retardant performance test: After the fireproof thermal insulation layer is prepared into a sample with a size of 200 mm x 200 mm x 100 mm, the flame retardant performance of the fireproof thermal insulation layer is tested according to GB 8624-2012 "Classification of Combustion Behavior of Building Materials and Products".

[0063] 3. Strength test: After the fireproof thermal insulation layer is prepared into a sample with a size of 200 mm x 600 mm x 100 mm, the tensile strength perpendicular to the surface of the fireproof thermal insulation layer is determined according to the method in GB / T 25975-2018 "Rock Wool Products for External Thermal Insulation of Building Walls".

[0064] The test results are shown in Tables 1-2:

[0065] Table 1 Thermal insulation performance test results of fireproof thermal insulation layer

[0066]

[0067] As can be seen from the data in Table 1, the thermal conductivity of the fireproof thermal insulation layer in Examples 1-5 is lower than that of Comparative Example 1, indicating that the addition of modified hollow glass microspheres can reduce the thermal conductivity of the fireproof thermal insulation layer and improve its thermal insulation performance.

[0068] Table 2 Flame retardant performance and strength test results of fireproof thermal insulation layer

[0069]

[0070] As can be seen from the data in Table 2, the flame retardant performance and tensile strength perpendicular to the surface of the fireproof thermal insulation layer in Examples 3, 6-7 are higher than that of Example 8, indicating that the addition of 3-bromo-1-propanol improves the bonding strength of the adhesive, thereby improving the tensile strength perpendicular to the surface of the fireproof thermal insulation layer. At the same time, the addition of 3-bromo-1-propanol is also beneficial to improving the flame retardant performance of the fireproof thermal insulation layer.

[0071] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fireproof and heat-insulating board, characterized in that, It includes a fireproof and heat-insulating layer and metal plates disposed on both sides of the fireproof and heat-insulating layer; the fireproof and heat-insulating layer includes the following raw materials in parts by weight: 50-60 parts of aluminum silicate fiber, 30-40 parts of glass fiber, 10-15 parts of modified hollow glass microspheres, and 6-8 parts of binder. The modified hollow glass microspheres were obtained by modifying hollow glass microspheres with ethyl 4-aminophenylacetic acid. The mass ratio of ethyl 4-aminophenylacetate to hollow glass microspheres in the modified hollow glass microspheres is 4~7:105; The method for preparing the modified hollow glass microspheres includes the following steps: dispersing ethyl 4-aminophenylacetate in anhydrous ethanol, then adding hollow glass microspheres, mixing, and drying to obtain modified hollow glass microspheres; The raw materials for the glass fiber include the following components by weight: 80-85 parts waste glass, 6-8 parts borax, 10-15 parts quartz sand, 1-4 parts soda ash, and 2-4 parts limestone. The raw materials for the aluminum silicate fiber include the following components by weight: 50-70 parts coal gangue, 25-30 parts alumina, 12-15 parts quartz sand, and 2-4 parts sodium oxide. The diameter of the hollow glass microspheres is 10~100μm; The adhesive is composed of silica sol, polyvinyl alcohol, 3-bromo-1-propanol and water; The mass ratio of silica sol, polyvinyl alcohol, and 3-bromo-1-propanol in the raw materials of the adhesive is 91:6:3~5.

2. A method for preparing a fireproof and heat-insulating board, used to prepare the fireproof and heat-insulating board as described in claim 1, characterized in that, Includes the following steps: S1. After uniformly mixing aluminum silicate fiber, glass fiber, and modified hollow glass microspheres, add binder, press, and cure to obtain a fireproof and heat-insulating layer. S2. After combining the fireproof and heat-insulating layer with the metal plates on both sides, a fireproof and heat-insulating board is obtained.

3. The method for preparing a fireproof and heat-insulating board according to claim 2, characterized in that, In step S1, the curing temperature is 130~150℃.

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