Fireproof, heat-insulating, water-repellent and decorative integrated composite wallboard and preparation method thereof

Abstract

The present application relates to a kind of fireproof heat preservation hydrophobic decorative integrated composite wallboard and its preparation method, wherein, composite wallboard is prepared by the raw material of mass parts: gypsum powder 700~800 parts, retarder 0.1~1.0 parts, foaming agent 0.3~0.5 parts, inorganic fiber 50~70 parts, water 600~700 parts, binder 200~400 parts, hydrophobic agent 20~30 parts, acid agent 3~5 parts and pH regulator 3~5 parts.The fireproof heat preservation hydrophobic decorative integrated composite wallboard provided by the present application has the advantages of light weight, small thickness, good heat preservation and fireproof effect, and the wallboard as a whole has hydrophobicity.The decorative layer is integrated with the wallboard, which is easy to construct and has low installation cost.The preparation method has the advantages of simple construction process, high installation efficiency and light wall weight, thereby improving the application effect and stability of the building partition wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light wallboard, and particularly relates to a fireproof, heat-insulating, water-repellent and decorative integrated composite wallboard. BACKGROUND

[0002] The light partition wall is mainly assembled by a keel, a heat-insulating board, a fireproof board and a decorative material. The heat-insulating material (such as a basalt fiber board) is inserted into the cavity of the keel to meet the heat-insulating performance of the wall. The fireproof gypsum board is used to fix the two side panels of the keel, and the gypsum board and calcium silicate board are generally used. If the partition wall has the water-proof performance requirement, a waterproof layer needs to be additionally added. Finally, the decorative layer is installed. In order to meet the various performances, the traditional partition wall needs to use dry hanging to assemble the wallboards with different performances, the construction process is relatively complicated, the overall weight and thickness of the wall are large, and the surface of the wall needs to be decorated again, so the installation efficiency is low.

[0003] For the partition wall with the water-proof performance requirement, a waterproof layer needs to be added. The waterproof layer of the partition wall is generally made of a waterproof board and waterproof paint. The traditional waterproof board and paint do not have the fireproof performance. When one side of the wall is on fire, the crystal water in the gypsum board as the fireproof board evaporates, and the temperature of the inner side rapidly rises to melt the basalt fiber board, so the fireproof and heat-insulating performance is low, and there is a corresponding safety hazard.

[0004] At present, the most widely used material for the fireproof material of the partition wall is the gypsum board. However, the water-proof performance of the gypsum board may cause the mildew, expansion or deterioration of the gypsum product, so the water-proof performance of the gypsum board is an important factor affecting the durability of the gypsum. At present, the most common method is to use the water-repellent agent to perform the surface treatment on the gypsum. However, such treatment only makes the surface of the gypsum have the water-proof performance, and the internal part of the base material still does not have the water-proof function. The main problem of directly adding the water-repellent agent in the gypsum preparation process is that the pH of the gypsum slurry is affected, so that the gypsum slurry cannot be solidified. At present, the related invention patent adds the adjusting agent to adjust the pH of the gypsum slurry, but the added material is an organic material, which weakens the fireproof performance of the gypsum as the fireproof material. SUMMARY

[0005] (1) Technical problem to be solved

[0006] In view of the above-mentioned defects and disadvantages of the prior art, the present application provides a fireproof, heat-insulating, water-repellent and decorative integrated composite wallboard and a preparation method thereof. The wallboard mainly integrates the fireproof, water-repellent and decorative board, so that the overall heat-insulating, water-repellent and fireproof performance of the wallboard is greatly improved.

[0007] (2) Technical scheme

[0008] In order to achieve the above object, the main technical scheme adopted by the present application comprises:

[0009] A fireproof, heat-insulating, decorative and water-repellent integrated composite wallboard is prepared from the following raw materials in parts by mass: 700-800 parts of plaster of Paris, 0.1-1.0 parts of a retarder, 0.3-0.5 parts of a foaming agent, 50-70 parts of inorganic fibers, 600-700 parts of water, 200-400 parts of a binder, 20-30 parts of a water-repellent agent, 3-5 parts of an acid agent and 3-5 parts of a pH regulator.

[0010] Further, preferably, the plaster of Paris is 700-780 parts, the retarder is 0.1-0.40 parts, the foaming agent is 0.3-0.45 parts, the inorganic fibers are 50-65 parts, the water is 600-680 parts, the binder is 200-390 parts, the water-repellent agent is 20-24 parts, the acid agent is 3-4.5 parts and the pH regulator is 3.3-4.3 parts.

[0011] Further, preferably, the plaster of Paris is semi-hydrated gypsum, and the main component is CaSO4·1 / 2H2O;

[0012] The retarder is a mixture of citric acid and sodium hexametaphosphate in a mass ratio of 1:0.3-0.5;

[0013] The foaming agent is sodium dodecyl sulfide;

[0014] The inorganic fibers are ceramic fibers or glass fibers;

[0015] The binder is a mixture of sodium acrylate, polyvinyl alcohol and gum arabic in a mass ratio of 1:0.5-1:0.5-2;

[0016] The water-repellent agent is a mixture of vinyl trimethoxysilane, methyl trimethoxysilane and hexadecane trimethyl oxysilane in a mass ratio of 1:0.2-0.5:0.1-0.3;

[0017] The acid agent is acetic acid;

[0018] The pH regulator is sodium carbonate.

[0019] A method for preparing the fireproof, heat-insulating, decorative and water-repellent integrated composite wallboard as described above comprises the following steps:

[0020] S1, preparing raw materials of plaster of Paris, a retarder, a foaming agent, inorganic fibers, water, a binder, a water-repellent agent, an acid agent and a pH regulator in parts by mass;

[0021] S2, mix water with hydrophobic agent and acid, stir until complete hydrolysis, then stand, then add pH regulator to adjust the pH value of the solution to neutral, then add retarder, after the retarder is completely dissolved, add inorganic fiber, uniformly disperse, then add gypsum powder, stir until the slurry is uniform, then add binder and foaming agent, stir until uniform, to obtain gypsum slurry;

[0022] S3, place waterproof decorative board or wallpaper on the bottom layer of the mold, pour part of the gypsum slurry obtained in step S2 into the mold for pouring, after vibrating, place the board with fireproof and thermal insulation and surface hydrophobic properties in the gypsum slurry, after standing, obtain the composite wallboard semi-finished product;

[0023] S4, secondary pouring of the composite wallboard semi-finished product, pour the remaining gypsum slurry into the mold for secondary pouring, after vibrating again, obtain the composite wallboard after secondary pouring and vibrating;

[0024] S5, let the composite wallboard after secondary pouring and vibrating stand at room temperature until it is completely hardened, demold and dry, to obtain the fireproof, thermal insulation and waterproof decorative integrated composite wallboard.

[0025] The preparation method described above, preferably, in step S2, the standing time is 18-24h, and the pH value is 7.

[0026] The preparation method described above, preferably, in step S3, the height of the gypsum slurry poured into the mold is 5-10cm, wait for 2-3min before vibrating, the vibrating conditions are first vibrating at a vibration frequency of 10-15HZ for 5-10s, then vibrating at a vibration frequency of 50HZ for 3-4s.

[0027] The preparation method described above, preferably, in step S3, the board with fireproof, thermal insulation and surface hydrophobic properties is an aluminum silicate fiber board or a vacuum insulation board; its thickness is 5-10mm; and the standing time is 1-2h.

[0028] The preparation method described above, preferably, in step S4, the thickness of the gypsum slurry for secondary pouring is 10-25cm, wait for 2-3min before vibrating, the vibrating conditions are first vibrating at a vibration frequency of 10-15HZ for 5-10s, then vibrating at a vibration frequency of 50HZ for 3-4s.

[0029] The preparation method as described above, preferably, in step S5, the drying condition is drying at a temperature of 40-60 DEG C for 24-48h, and the water content of the final product should be controlled to be less than 15%. The composition for preparing the fireproof, thermal-insulating, decorative and water-repellent integrated composite board comprises, by weight, 700-800 parts of plaster of Paris powder, 0.1-1.0 parts of retarder, 0.3-0.5 parts of foaming agent, 50-70 parts of inorganic fiber, 600-700 parts of water, 200-400 parts of binder, 20-30 parts of water-repellent agent, 3-5 parts of acid agent and 3-5 parts of pH regulator.

[0030] Further preferably, the composition comprises, by weight, 700-780 parts of plaster of Paris powder, 0.1-0.4 parts of retarder, 0.3-0.45 parts of foaming agent, 50-65 parts of inorganic fiber, 600-680 parts of water, 200-390 parts of binder, 20-24 parts of water-repellent agent, 3-4.5 parts of acid agent and 3.3-4.3 parts of pH regulator.

[0031] Further, preferably, the plaster of Paris powder is hemihydrate gypsum, and the main component is CaSO4·1 / 2H2O; the retarder is a mixture of citric acid and sodium hexametaphosphate with a mass ratio of 1:0.3-0.5; the foaming agent is sodium dodecyl sulfate; the inorganic fiber is ceramic fiber or glass fiber; the binder is a mixture of sodium acrylate, polyvinyl alcohol and gum arabic with a mass ratio of 1:0.5-1:0.5-2; the water-repellent agent is a mixture of vinyl trimethoxysilane, methyl trimethoxysilane and hexadecane trimethoxysilane with a mass ratio of 1:0.2-0.5:0.1-0.3; the acid agent is acetic acid; and the pH regulator is sodium carbonate.

[0032] (III) Beneficial Effects

[0033] The fireproof, thermal-insulating, decorative and water-repellent integrated composite wallboard provided by the application has the advantages of light weight, small thickness, good thermal-insulating and fireproof effects, and water repellency of the whole wallboard; the decorative layer is integrated with the wallboard, so that the construction is convenient and the installation cost is low.

[0034] The preparation method of the fireproof, thermal-insulating, decorative and water-repellent integrated composite wallboard provided by the application comprises the following steps: hydrolyzing the water-repellent agent under acidic conditions, adding an alkaline substance to adjust the pH, and making the whole wallboard water-repellent; using a mold to prepare the wallboard, and using twice vibration to make the closed bubbles uniformly distributed before preparing the composite wallboard semi-product and the composite wallboard; fixing the decorative board or wall paper in the mold, and using the setting and hardening of the gypsum to integrate the wallboard and the decorative board or wall paper, so that the traditional fixing mode such as nailing is not needed in the preparation process, and the weak point of fireproofing at the position of nails is eliminated. The preparation method has the advantages of simple construction process, high installation efficiency and light wall weight, thereby improving the application effect and stability of the building partition wall. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the fireproof, heat-insulating, decorative, and hydrophobic composite wall panel obtained by the preparation method of the present invention.

[0036] Figure 2 This is a schematic diagram of a traditional firewall board. Detailed Implementation

[0037] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] This invention primarily addresses the problems of low installation efficiency, complex construction processes, and poor fire resistance, thermal insulation, and water-repellent properties in existing lightweight partition walls, which pose safety hazards. Therefore, it provides a composite wall panel integrating fire resistance, thermal insulation, water repellency, and decoration, along with its preparation method. The method uses gypsum as the matrix and aluminum silicate fiberboard or vacuum insulation board as the fireproof and thermal insulation material. By hydrolyzing a water-repellent agent under acidic conditions and then adding an alkaline substance to adjust the pH, the entire panel becomes hydrophobic. During preparation, the water-repellent agent is first improved before adding other raw materials, giving the gypsum matrix itself waterproof properties. Simultaneously, a foaming agent is introduced into the gypsum matrix to enhance its thermal insulation performance. Furthermore, compared to traditional structures of the same thickness, this structure offers improved thermal insulation and fire resistance.

[0039] The present invention provides a fireproof, heat-insulating, decorative and hydrophobic composite wall panel, which is prepared by means of 700-800 parts of calcined gypsum powder, 0.1-1.0 parts of retarder, 0.3-0.5 parts of foaming agent, 50-70 parts of inorganic fiber, 600-700 parts of water, 200-400 parts of binder, 20-30 parts of hydrophobic agent, 3-5 parts of acid agent and 3-5 parts of pH adjuster.

[0040] This invention also provides a method for preparing an integrated fireproof, heat-insulating, decorative, and hydrophobic composite board, which is carried out according to the following steps:

[0041] I. Weighing:

[0042] First, weigh out 700-800 parts of calcined gypsum powder, 0.1-1.0 parts of retarder, 0.3-0.5 parts of foaming agent, 50-70 parts of inorganic fiber, 600-700 parts of water, 200-400 parts of binder, 20-30 parts of hydrophobic agent, 3-5 parts of acid agent, and 3-5 parts of pH adjuster according to the following weight proportions:

[0043] II. Preparation of gypsum slurry:

[0044] Mix 600-700 parts of water with 20-30 parts of hydrophobic agent and 3-5 parts of acid agent, stir until completely hydrolyzed, then stand for 24 h, then add 3-5 parts of pH adjuster to adjust the solution to pH 7, then add 0.1-1.0 parts of retarder, after the retarder is completely dissolved, add 50-70 parts of inorganic fiber, uniformly disperse, then add 700-800 parts of gypsum powder, stir, after the slurry is uniform, add 200-400 parts of binder and 0.3-0.5 parts of foaming agent, stir uniformly to prepare the gypsum slurry;

[0045] III. Pouring, vibrating and compounding

[0046] Put waterproof decorative board or wallpaper on the bottom layer of the mold, pour the prepared gypsum slurry into the mold to a height of 5-10 cm, wait for 2-3 min, then vibrate at a frequency of 10-15 HZ for 5-10 s, then vibrate at a frequency of 50 HZ for 3-4 s, then gently place the aluminum silicate fiber board or vacuum insulation board with fireproof and thermal insulation properties and a thickness of 5-10 mm in the gypsum slurry, wait for 1-2 h to obtain a composite wallboard semi-finished product.

[0047] IV. Secondary pouring and vibrating

[0048] Secondary pouring is performed on the composite board semi-finished product, the remaining gypsum slurry is poured into the mold to a height of 10-25 cm, after secondary pouring is completed, wait for 2-3 min, then vibrate at a frequency of 10-15 HZ for 5-10 s, then vibrate at a frequency of 50 HZ for 3-4 s to obtain a composite wallboard after secondary pouring and vibrating.

[0049] V. Demolding

[0050] The composite wallboard obtained after secondary pouring and vibrating is placed at room temperature until it is completely hardened, then demolding is performed, the wallboard is placed in an oven at 40-60℃ for 24-48 h, then the wallboard is dried until the water content is less than 15%, thus obtaining a fireproof, thermal insulation, and hydrophobic decorative integrated composite wallboard.

[0051] In the present application, through a large number of experimental researches, it is found that, for the selection of the hydrophobic agent, preferably, a combination of vinyl trimethoxysilane, methyl trimethoxysilane and hexadecane trimethoxysilane is adopted to obtain better hydrophobicity, wherein the vinyl trimethoxysilane, the methyl trimethoxysilane and the hexadecane trimethoxysilane present better hydrophobic effect under a certain mixing ratio, and the addition of the acid agent acetic acid is to make the three better hydrolyzed. The poor hydrophobicity will cause the board to absorb moisture when used in a relatively humid place, resulting in the decline of the overall mechanical properties and the heat transfer coefficient of the integrated board. Among the dihydrate gypsum and the hemihydrate gypsum, the preferred plaster powder is the hemihydrate gypsum, which has a faster heat release effect than the dihydrate gypsum, can provide a certain amount of heat for its own foaming in a short time, and the amount is preferably 700-800 parts, and too much or too little will affect the foaming effect, so the amount of the hemihydrate gypsum is preferably 700-800 parts, and most preferably 700-780 parts.

[0052] In the preparation method of the present application, the composite wallboard prepared by the low-frequency vibration vibration step can realize the uniform dispersion of each component and closed bubbles, so that the stability and heat transfer coefficient of the composite wallboard product are better.

[0053] In order to better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail below, however, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer, more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0054] Example 1

[0055] The present embodiment prepares a method for preparing a fireproof, heat-insulating, decorative and hydrophobic integrated composite board, as follows:

[0056] S1, weighing

[0057] First, 750 parts of hemihydrate gypsum, 0.5 parts of citric acid, 0.2 parts of sodium hexametaphosphate, 0.4 parts of sodium dodecyl sulfide, 60 parts of ceramic fiber, 650 parts of water, 100 parts of sodium acrylate, 100 parts of polyvinyl alcohol, 200 parts of gum arabic, 20 parts of vinyl trimethoxysilane, 5 parts of methyl trimethoxysilane, 4 parts of hexadecane trimethoxysilane, 4 parts of acetic acid and 4 parts of sodium carbonate are weighed according to the mass fraction.

[0058] S2, preparing gypsum slurry

[0059] Mix 650 parts of water with hydrophobic agent, namely 20 parts of vinyl trimethoxysilane, 5 parts of methyl trimethoxysilane, 4 parts of hexadecane trimethoxysilane and 4 parts of acetic acid, stir until complete hydrolysis, then stand for 24 h, then add 4 parts of sodium carbonate to adjust the solution to pH 7, then add retarder, namely 0.5 parts of citric acid and 0.2 parts of sodium hexametaphosphate, after the retarder is completely dissolved, add 60 parts of ceramic fiber, uniformly disperse, then add 750 parts of hemihydrate gypsum and stir, after the slurry is uniform, add 100 parts of sodium acrylate, 100 parts of polyvinyl alcohol, 200 parts of gum arabic and 0.4 parts of sodium dodecyl sulfide, stir uniformly to prepare a gypsum slurry;

[0060] S3, pouring, vibrating and compounding

[0061] Put the waterproof decorative plate or wallpaper into the mold bottom layer, pour the prepared gypsum slurry into the mold to a height of 10 cm, wait for 3 min, then vibrate at a vibration frequency of 15 HZ for 10 s, then vibrate at a vibration frequency of 50 HZ for 4 s, then gently place the aluminum silicate fiber board with fireproof thermal insulation and surface hydrophobic performance and a thickness of 8 mm in the gypsum slurry, wait for 2 h to obtain a composite wallboard semi-finished product;

[0062] S4, secondary pouring and vibrating

[0063] Secondary pouring is performed on the composite wallboard semi-finished product, the remaining gypsum slurry is poured into the mold to a height of 20 cm, after the secondary pouring is completed, wait for 3 min, then vibrate at a vibration frequency of 15 HZ for 10 s, then vibrate at a vibration frequency of 50 HZ for 4 s to obtain a composite wallboard after secondary pouring and vibrating;

[0064] Five, demolding

[0065] The composite wallboard obtained after secondary pouring and vibrating is placed at room temperature until it is completely hardened, then demolding is performed, the excess moisture is dried in an oven at 60℃ for 24 h to obtain a fireproof thermal insulation and hydrophobic decorative integrated composite wallboard.

[0066] Example 2

[0067] The method for preparing a fireproof thermal insulation and hydrophobic decorative integrated composite board material in this example is as follows:

[0068] S1, weighing

[0069] First, weigh 800 parts of hemihydrate gypsum, 0.7 parts of lemon, 5 parts of methyl trimethoxysilane, 2.5 parts of hexadecane trimethoxysilane, 0.5 parts of sodium dodecyl sulfide, 60 parts of glass fiber, 700 parts of water, 150 parts of sodium acrylate, 113 parts of polyvinyl alcohol, 250 parts of gum arabic, 25 parts of vinyl trimethoxysilane, 5 parts of methyl trimethoxysilane, 2.5 parts of hexadecane trimethoxysilane, 5 parts of acetic acid and 5 parts of sodium carbonate;

[0070] S2, preparing gypsum slurry

[0071] 700 parts of water are mixed with 25 parts of vinyl trimethoxysilane, 5 parts of methyl trimethoxysilane and 2.5 parts of hexadecane trimethoxysilane and 5 parts of acetic acid, stirred until complete hydrolysis, then left to stand for 24 h, then 5 parts of sodium carbonate are added to adjust the solution to pH 7, then 0.7 parts of citric acid and 0.28 parts of sodium hexametaphosphate are added, after the retarder is completely dissolved, 60 parts of glass fiber are added, uniformly dispersed, then 800 parts of hemihydrate gypsum are stirred, after the slurry is uniform, 150 parts of sodium acrylate, 113 parts of polyvinyl alcohol, 250 parts of gum arabic and 0.5 parts of sodium dodecyl sulfide are added, and the gypsum slurry is prepared after uniform stirring;

[0072] S3, pouring, vibrating and compounding

[0073] A waterproof decorative plate or wallpaper is placed on the bottom layer of the mold, the prepared gypsum slurry is poured into the mold to a height of 8 cm, and after waiting for 2 min, vibration is performed at a vibration frequency of 10 HZ for 18 s, and then vibration is performed at a vibration frequency of 50 HZ for 3 s, then a vacuum insulation board with fireproof and thermal insulation and surface hydrophobic properties and a thickness of 10 mm is gently placed in the gypsum slurry, and after waiting for 2 h, a composite wallboard semi-finished product is obtained;

[0074] S4, secondary pouring and vibrating

[0075] The composite board semi-finished product is subjected to secondary pouring, the remaining gypsum slurry is poured into the mold to a height of 22 cm, after the secondary pouring is completed, waiting for 2 min, first vibrating at a vibration frequency of 10 HZ for 8 s, and then vibrating at a vibration frequency of 50 HZ for 4 s, to obtain a composite wallboard after secondary pouring and vibrating;

[0076] S5, demolding

[0077] The composite wallboard obtained after secondary pouring and vibrating is left to stand at room temperature until it is completely hardened, and is demolded, and is placed in an oven at 40 DEG C for 48 h to dry the excess moisture, to obtain a fireproof, thermal insulation, hydrophobic and decorative integrated composite wallboard.

[0078] The fireproof, thermal insulation, hydrophobic and decorative integrated composite wallboard prepared by the application has the following properties:

[0079] I. Fireproof effect: the wallboard structure prepared by the application is as shown in Figure 1 The modified gypsum board 2 is wrapped around the outer periphery of the fireproof board 1, which is equivalent to the traditional gypsum board + fireproof and thermal insulation board + gypsum board, and the traditional nailing method is cancelled after integration, eliminating the weak point of fireproofing at the nailing position; at the same time, the moisture generated during the combustion of the gypsum board achieves the effect of flame retardation, greatly improving the fireproof performance of the integrated wallboard. The traditional wallboard structure is as shown in Figure 2The fire resistance limit of the fireproof, thermal insulation, water repellent and decorative integrated composite wallboard prepared according to Example 1 can reach 3h15min, and the fire resistance limit of the product prepared according to Example 2 can reach 2h45min according to the test method of fire resistance test of building materials and structures (BS476: Part 22).

[0080] II. Thermal insulation effect: The vibration stage of the composite wallboard makes the closed bubbles in the gypsum board uniformly distributed in the wallboard, and the uniformly closed bubbles also greatly improve the thermal insulation performance of the wallboard. According to the GB / T34342 test method, the heat transfer coefficient of the product obtained according to Example 1 is 0.35 W / (m 2 ·K), and the heat transfer coefficient of the product obtained according to Example 2 is 0.4 W / (m 2 ·K).

[0081] III. Water repellency and decoration: The water repellent agent is hydrolyzed under acidic conditions, and then adjusted to neutral and incorporated into the gypsum slurry, so that the wallboard as a whole has water repellency; the decorative layer is integrated with the wallboard, which is convenient for construction and reduces the installation cost.

[0082] Comparative Example 1

[0083] This comparative example is based on Example 1, except that the water repellent agent is only vinyl trimethoxysilane, and does not contain methyl trimethoxysilane and hexadecane trimethoxysilane.

[0084] Comparative Example 2

[0085] This comparative example is based on Example 2, except that the water repellent agent is vinyl trimethoxysilane, and does not contain methyl trimethoxysilane and hexadecane trimethoxysilane; the inorganic fiber is glass fiber, and the binder is only sodium acrylate, and does not contain polyvinyl alcohol and arabic gum.

[0086] Comparative Example 3

[0087] This comparative example is based on Example 1, except that the water repellent agent is vinyl trimethoxysilane and methyl trimethoxysilane, and does not contain hexadecane trimethoxysilane; the binder is polyvinyl alcohol and arabic gum, and does not contain sodium acrylate.

[0088] According to the test method of fire resistance test of building materials and structures BS 476: Part 22 and the test method of heat transfer coefficient test of envelope GB / T34342, the fire resistance limit of the composite wallboard obtained according to Comparative Example 1 is 1h5min, and the heat transfer coefficient is 0.95 W / (m 2 ·K); the fire resistance limit of the composite wallboard obtained according to Comparative Example 2 is 45min, and the heat transfer coefficient is 0.8 W / (m 2 ·K); the fire resistance limit of the composite wallboard obtained according to Comparative Example 3 is 1h25, and the heat transfer coefficient is 0.67 W / (m 2 ·K).

[0089] The fireproof, thermal insulation, and decorative hydrophobic integrated composite board prepared by the above embodiments of the present application can meet the requirements of the People's Republic of China Industry Standard “Application Technical Specification for Thermal Insulation Fireproof Composite Board” JGJ / T 350-2015 in terms of mechanical properties. As can be seen from the test results above, the board performs excellently in terms of thermal insulation and fireproof performance, and can be applied to high fireproof requirement partition walls, as well as building envelope outer walls and inner thermal insulation layers of outer walls.

[0090] In addition, in Comparative Example 1, the hydrophobic agent used is only vinyl trimethoxysilane, which leads to a serious decline in hydrophobic performance and a significant weakening of thermal insulation effect. It can be seen that the use of a single type of hydrophobic agent makes the overall durability of the integrated board poor, so the time to reach the fireproof limit is shortened. In Comparative Example 2, a single hydrophobic agent, adhesive, and inorganic fiber are used, and the inorganic fiber used is glass fiber. The temperature resistance limit of glass fiber is lower than that of ceramic fiber, so the fireproof limit of Comparative Example 2 is reduced. The single hydrophobic agent and adhesive also lead to a decrease in the hydrophobic performance and adhesive capacity of the integrated board, an increase in the heat transfer coefficient, and a decrease in the thermal insulation effect. In Comparative Example 3, two-component hydrophobic agents and adhesives are used respectively, but the effect is poorer than that of Example 1. It can be seen that the preparation method of the fireproof, thermal insulation, and decorative integrated composite wallboard provided by the present application greatly improves the overall thermal insulation, hydrophobic, and fireproof performance of the wallboard, and does not require the use of traditional fixing methods such as nailing during the preparation process, eliminating the fireproof weak point of the nail part.

[0091] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fireproof, heat-insulating, water-repellent, and decorative integrated composite wall panel, characterized in that, It is prepared by means of the following raw materials by weight: 700-780 parts of calcined gypsum powder, 0.1-0.40 parts of retarder, 0.3-0.45 parts of foaming agent, 50-65 parts of inorganic fiber, 600-680 parts of water, 200-390 parts of binder, 20-24 parts of hydrophobic agent, 3-4.5 parts of acid agent and 3.3-4.3 parts of pH adjuster; The retarder is a mixture of citric acid and sodium hexametaphosphate in a mass ratio of 1:0.3-0.5; the foaming agent is sodium dodecyl sulfate; the inorganic fiber is ceramic fiber or glass fiber; the hydrophobic agent is a mixture of vinyltrimethoxysilane, methyltrimethoxysilane and hexadecanetrimethoxysilane in a mass ratio of 1:0.2-0.5:0.1-0.

3. The composite wall panel is obtained by the following preparation method, including the following steps: S1. Prepare raw materials according to the mass proportions: calcined gypsum powder, retarder, foaming agent, inorganic fiber, water, binder, hydrophobic agent, acid agent, and pH adjuster; S2. Mix water with hydrophobic agent and acid, stir until completely hydrolyzed, let stand, then add pH adjuster to adjust the pH of the solution to neutral, then add retarder, and after the retarder is completely dissolved, add inorganic fiber, disperse evenly, then add calcined gypsum powder and stir, and after the slurry is uniform, add binder and foaming agent, stir evenly to obtain gypsum slurry. S3. Place waterproof decorative board or wallpaper at the bottom of the mold, pour some of the gypsum slurry obtained in step S2 into the mold for pouring, and after vibration, place the fireproof and heat-insulating board with hydrophobic surface in the gypsum slurry. After standing, the composite wall panel semi-finished product is obtained. S4. The composite board semi-finished product is poured a second time. The remaining gypsum slurry is poured into the mold for a second pour. After vibration again, the composite wall panel after the second pour and vibration is obtained. The vibration conditions are as follows: first vibrate at a vibration frequency of 10-15 Hz for 5-10 seconds, and then vibrate at a vibration frequency of 50 Hz for 3-4 seconds. S5. The composite wall panel obtained by secondary pouring and vibration is left to stand at room temperature until it is completely hardened, then demolded and dried to obtain a fireproof, heat-insulating, water-repellent and decorative integrated composite wall panel.

2. The composite wall panel as described in claim 1, characterized in that, The calcined gypsum powder is hemihydrate gypsum, and its main component is CaSO4·1 / 2H2O; The adhesive is a mixture of sodium acrylate, polyvinyl alcohol, and gum arabic in a mass ratio of 1:0.5 to 1:0.5 to 2. The acid is acetic acid; The pH adjuster is sodium carbonate.

3. The composite wall panel as described in claim 1, characterized in that, In step S2, the settling time is 18–24 hours, and the pH value is 7.

4. The composite wall panel as described in claim 1, characterized in that, In step S3, the gypsum slurry is poured into the mold to a height of 5-10 cm. After waiting for 2-3 minutes, it is vibrated. The vibration conditions are: first vibrate at a vibration frequency of 10-15 Hz for 5-10 seconds, and then vibrate at a vibration frequency of 50 Hz for 3-4 seconds.

5. The composite wall panel as described in claim 1, characterized in that, In step S3, the fireproof, heat-insulating, and hydrophobic board is an aluminum silicate fiberboard or a vacuum insulation board; its thickness is 5-10 mm; and the settling time is 1-2 hours.

6. The composite wall panel as described in claim 1, characterized in that, In step S4, the thickness of the second-poured gypsum slurry is 10-25cm, and it is vibrated after waiting for 2-3 minutes. In step S5, the drying conditions are drying at a temperature of 40–60°C for 24–48 hours.

7. A composition for preparing an integrated fireproof, heat-insulating, decorative, and hydrophobic composite board, characterized in that, It comprises, by weight, 700-780 parts of calcined gypsum powder, 0.1-0.40 parts of retarder, 0.3-0.45 parts of foaming agent, 50-65 parts of inorganic fiber, 600-680 parts of water, 200-390 parts of binder, 20-24 parts of hydrophobic agent, 3-4.5 parts of acid agent, and 3.3-4.3 parts of pH adjuster; the calcined gypsum powder is hemihydrate gypsum, mainly composed of CaSO4·1 / 2H2O; the retarder is lemon precipitate at a mass ratio of 1:0.3-0.

5. The mixture comprises an acid and sodium hexametaphosphate; the foaming agent is sodium dodecyl sulfate; the inorganic fiber is ceramic fiber or glass fiber; the binder is a mixture of sodium acrylate, polyvinyl alcohol and gum arabic in a mass ratio of 1:0.5 to 1:0.5 to 2; the hydrophobic agent is a mixture of vinyltrimethoxysilane, methyltrimethoxysilane and hexadecanetrimethoxysilane in a mass ratio of 1:0.2 to 0.5:0.1 to 0.3; the acid is acetic acid; and the pH adjuster is sodium carbonate.

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