Prefabricated integrated durable thermal insulation wallboard and preparation method thereof

Abstract

The application discloses a fabricated integrated durable thermal insulation wallboard and a preparation method thereof, and belongs to the technical field of thermal insulation wallboard preparation. The fabricated integrated durable thermal insulation wallboard comprises an interior decoration layer, a thermal insulation layer and a durable layer from inside to outside. The interior decoration layer is coated by latex paint, the thermal insulation layer is composed of thermal insulation layer slurry, and the durable layer is coated by durable layer paint. The thermal insulation wallboard prepared by the method has excellent flame-retardant effect, thermal insulation effect, durability effect and mechanical properties.

Description

Technical Field

[0001] This invention belongs to the field of thermal insulation wall panel preparation technology, specifically relating to prefabricated integrated durable thermal insulation wall panels and their preparation methods. Background Technology

[0002] With the rapid development of my country's economy and society, the construction industry, as a vital pillar of the national economy, has maintained a sustained rapid growth trend. Traditional construction methods such as bricklaying and precast slab construction, due to their long construction cycles, unstable quality, and material waste, are no longer sufficient to meet the demands of modern construction for speed, efficiency, and environmental friendliness. Therefore, finding new building materials and construction methods to improve construction efficiency and quality has become an urgent need for the industry's development.

[0003] Prefabricated wall panels, as a new type of building material, have gradually gained widespread market attention due to their unique advantages. Prefabricated wall panels adopt a modular design, allowing for factory prefabrication. On-site installation requires only simple assembly to complete the wall construction, significantly shortening the construction cycle. The quality of prefabricated wall panels is controllable; factory production ensures material consistency and stability, reducing errors and uncertainties during on-site construction. During building use, the thermal insulation performance of exterior walls directly affects building energy consumption and user comfort. Traditional insulation materials often suffer from problems such as easy aging, easy detachment, and unstable insulation effects, making it difficult to meet the needs of long-term use. Therefore, developing a durable and stable thermal insulation wall panel is of great significance for improving the energy efficiency and service life of buildings.

[0004] Patent CN 109437666 B discloses an integrated prefabricated interior wall panel made of ferrosilicon slag and its preparation method. The main components are ferrosilicon slag fiber and desulfurized gypsum. This method can improve the utilization rate of ferrosilicon slag and desulfurized gypsum and reduce the production cost of building materials. However, there is still room for improvement in the thermal insulation performance, flame retardant performance, mechanical properties and durability of the interior wall prepared by this method. Summary of the Invention

[0005] The purpose of this invention is to provide prefabricated integrated durable thermal insulation wall panels and their preparation method, in order to solve the technical problems of poor thermal insulation effect, durability, mechanical properties and flame retardant properties of existing wall panels.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a prefabricated integrated durable thermal insulation wall panel, comprising an interior layer, an insulation layer, and a durability layer from the inside out. The interior layer is coated with latex paint, the insulation layer is composed of insulation slurry, and the durability layer is coated with a durability coating.

[0008] Preferably, the method for preparing the insulation layer slurry includes the following steps:

[0009] Q1: Add chitosan oligosaccharide and p-hydroxybenzaldehyde to ampoules, stir and mix, seal and purge under vacuum / nitrogen. Inject glacial acetic acid and methanol into ampoules using a syringe, and place them in an oil bath for reaction. After the reaction is complete, pour the liquid in the ampoule into ethanol for precipitation. After precipitation, wash, filter, and vacuum dry. Put the obtained product and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into ampoules, stir and mix, seal and purge under vacuum / nitrogen. Then add ethanol, heat to react, filter, and dry to obtain flame-retardant particles.

[0010] Q2: Add isoamyl acetate to a three-necked flask, purge with nitrogen to remove oxygen, then add maleic anhydride and styrene. After complete dissolution, add azobisisobutyronitrile, heat in a water bath, reflux, centrifuge to remove the supernatant, then add methanol to the remaining product and stir, centrifuge, and vacuum dry to obtain the intermediate product.

[0011] Q3: Add the intermediate product, ammonia, and distilled water to a sealed reagent bottle and stir magnetically to obtain a polymer aqueous solution. At the same time, add flame retardant particles to the reagent bottle, add distilled water, and stir to obtain a flame retardant aqueous solution. Add the polymer aqueous solution to the reagent bottle, then add distilled water and the flame retardant aqueous solution. After stirring magnetically, pour the resulting mixture into a mold, pre-cool, freeze-dry, and heat-treat to obtain a flame retardant composite aerogel.

[0012] Q4: After mixing the flame-retardant composite aerogel and aggregate evenly, a dry mix is ​​obtained. Then, cement, polycarboxylate superplasticizer, and hydroxypropyl cellulose ether are added to the mortar mixer and mixed evenly. Water is then added and mixed to obtain a uniform slurry. The dry mix and filler are added to the uniform slurry in sequence and mixed to obtain the thermal insulation slurry.

[0013] In the above process, firstly, flame-retardant particles with flame-retardant effects are synthesized using chitosan oligosaccharide, p-hydroxybenzaldehyde, and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as raw materials through a combination of substitution reaction and radial polymerization. Then, an intermediate product is synthesized using isoamyl acetate and maleic anhydride as raw materials via a self-stabilizing precipitation polymerization method. The flame-retardant particles and the intermediate product are then mixed, stirred, and freeze-dried to obtain a flame-retardant composite aerogel. Finally, a thermal insulation slurry is prepared by mixing and stirring cement, the flame-retardant composite aerogel, aggregates, polycarboxylate superplasticizer, hydroxypropyl cellulose ether, and fillers as raw materials. The synthesis reaction formula for the flame-retardant particles is as follows:

[0014]

[0015] Preferably, in Q1, the ratio of chitosan oligosaccharide, p-hydroxybenzaldehyde, glacial acetic acid, methanol, and ethanol is (1-2) g : (0.77-1.54) g : (0.2-0.4) mL : (15-30) mL : (50-100) mL, the number of vacuum / nitrogen purging cycles is 3-5, the oil bath temperature is 40-50℃, the reaction time is 18-24 h, the settling time is 12-15 h, and the vacuum drying time is 20-24 h. The ratio of the obtained product, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and ethanol is (1-2) g : (0.8-1.6) g : (15-30) mL, the number of vacuum / nitrogen purging cycles is 3-5, the heating reaction temperature is 80-90℃, the time is 18-24 h, and the drying temperature is 60-70℃.

[0016] Preferably, in Q2, the ratio of isoamyl acetate, maleic anhydride, styrene, azobisisobutyronitrile, and methanol is (500-750) mL : (24.5-36.7) g : (26-39) g : (0.4-0.6) g : (500-750) mL. The water bath temperature is raised to 70-80℃, the reflux time is 7-9 h, the centrifugation speed is 10000-12000 rpm, the time is 10-15 min, the stirring time is 0.5-1 h, and the vacuum drying temperature is 140-160℃, the time is 20-24 h.

[0017] Preferably, in Q3, the ratio of intermediate product, ammonia, and distilled water is (6-9) g: (4.2-6.3) g: (89.8-134.7) mL, the weight fraction of ammonia is 25 wt%, the magnetic stirring temperature is 90-100℃, the stirring time is 3-5 h, the ratio of flame retardant particles to distilled water is (4-6) g: (96-144) mL, the ratio of polymer aqueous solution, distilled water, and flame retardant aqueous solution is (32-48) g: (8-12) mL: (24-36) g, the magnetic stirring time is 30-40 min, the heat treatment temperature is 180-190℃, and the time is 2-4 h.

[0018] Preferably, in Q4, the weight ratio of flame-retardant composite aerogel, aggregate, cement, polycarboxylate superplasticizer, hydroxypropyl cellulose ether and filler is (10-20): (18-22): (44-48): (2.2-2.4): (11-12): (2-8.8).

[0019] Preferably, the method for preparing the durable coating layer includes the following steps:

[0020] S1: Dissolve aluminum dihydrogen phosphate powder in deionized water, sonicate to obtain an aqueous solution of aluminum dihydrogen phosphate, then disperse poly(fluoroethylene propylene) powder and carbon nanotubes in ethanol and magnetically stir to obtain a dispersion system.

[0021] S2: Add the aqueous solution of aluminum dihydrogen phosphate dropwise to the dispersion system and continue stirring to obtain the durable coating layer.

[0022] In the above process, perfluoroethylene propylene is used as the organic phase, aluminum dihydrogen phosphate is used as the inorganic phase, and carbon nanotubes are used as the emulsifier to form a durable coating layer.

[0023] Preferably, in S1, the ratio of aluminum dihydrogen phosphate powder to deionized water is (2-4) g:(10-15) mL, the ultrasonic treatment time is 10-15 min, the ratio of polytetrafluoroethylene propylene powder, carbon nanotubes and ethanol is (3-6) g:(2-4) g:(10-15) mL, the magnetic stirring speed is 200-300 rpm, and the stirring time is 20-30 min; in S2, the volume ratio of aluminum dihydrogen phosphate aqueous solution to dispersion system is (10-15) mL:(10-15) mL, the dropping rate is 1 mL / min, and the stirring time is 1-2 h.

[0024] Preferably, the preparation method of the prefabricated integrated durable thermal insulation wall panel includes the following steps:

[0025] Step (1): After the insulation slurry is poured into the mold, it is allowed to stand and then demolded to obtain the insulation layer;

[0026] Step (2): Spray the durable coating onto one side of the insulation layer, then calcine the sprayed insulation layer at high temperature. After calcine, apply latex paint to the other side of the insulation layer to obtain the assembled integrated durable insulation wall panel.

[0027] Preferably, in step (1), the standing time is 48-52h; in step (2), the high-temperature calcination temperature is 300-320℃ and the time is 40-60min.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. This invention first uses flame-retardant composite aerogel, aggregate, cement, polycarboxylate superplasticizer, hydroxypropyl cellulose ether and filler as raw materials to synthesize a thermal insulation slurry. Then, taking the thermal insulation slurry as the main part, one side is coated with latex paint, and the other side is sprayed with a durable coating made of aluminum dihydrogen phosphate powder, polytetrafluoroethylene propylene powder and carbon nanotubes. This results in a prefabricated integrated durable thermal insulation wall panel with excellent flame retardant effect, thermal insulation performance, mechanical properties and durability.

[0030] 2. This invention uses chitosan oligosaccharide, p-hydroxybenzaldehyde, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, isoamyl acetate, maleic anhydride, and styrene as raw materials to prepare flame-retardant composite aerogel. Then, it is mixed with aggregates and cement to obtain thermal insulation slurry. The wall panel prepared with this as the main component has excellent flame retardant, thermal insulation, and mechanical properties. Flame-retardant particles release phosphorus oxides under high-temperature conditions, preventing flame spread. These particles are uniformly dispersed and mixed into the polymer and flame-retardant aqueous solutions, and then introduced into the flame-retardant composite aerogel. Uniform dispersion ensures effective distribution of the flame-retardant particles within the material, resulting in a more uniform and durable flame-retardant effect. The prepared flame-retardant composite aerogel contains numerous tiny pores, which effectively reduce heat convection and radiation transfer, thereby lowering the thermal conductivity of the insulation wall panel and achieving excellent insulation performance. The cement, polycarboxylate superplasticizer, and hydroxypropyl cellulose ether in the insulation layer slurry also possess certain thermal stability, resisting the impact of temperature changes on the insulation wall panel's performance to a certain extent and maintaining its long-term stable insulation effect. Furthermore, after thorough stirring and mixing, the various components in the insulation layer slurry form a homogeneous mixture, which, upon curing, forms a structure with certain strength and toughness, endowing the insulation wall panel with excellent mechanical properties.

[0031] 3. This invention uses aluminum dihydrogen phosphate powder, perfluoroethylene propylene powder, and carbon nanotubes as raw materials to synthesize a durable coating. This coating is sprayed onto one side of the insulation layer to form a durable layer, increasing the durability of the insulation wall panel. After the aluminum dihydrogen phosphate powder dissolves, its phosphate groups form chemical bonds with the surface of the insulation layer, generating a thin film of aluminum phosphate that tightly bonds the insulation material to the particles. During heating, this film undergoes dehydration and polycondensation reactions, enhancing the material's high-temperature strength. The perfluoroethylene propylene powder possesses excellent heat resistance, chemical corrosion resistance, and stability, protecting the insulation layer from damage by chemicals and high temperatures. The carbon nanotubes, with their high strength and toughness, are uniformly dispersed in the coating, significantly improving the coating's mechanical properties and durability, and enhancing the adhesion between the coating and the insulation layer. The combined effect of these components forms a tough, stable, and weather-resistant protective layer, effectively blocking external erosion and significantly improving the overall durability and service life of the wall panel. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is the front view of the prefabricated integrated durable thermal insulation wall panel of the present invention.

[0034] Attached diagram descriptions: 1. Interior layer, 2. Insulation layer, 3. Durability layer. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] See Figure 1 As shown, the structure of the prefabricated integrated durable thermal insulation wall panel in this embodiment includes an interior layer 1, an insulation layer 2, and a durability layer 3 from the inside out. The interior layer is coated with latex paint, the insulation layer is composed of insulation slurry, and the durability layer is coated with durability coating.

[0038] Example 2

[0039] This embodiment discloses a method for preparing a thermal insulation layer slurry, including the following steps:

[0040] Q1: Add 1.5g of chitosan oligosaccharide and 1.25g of p-hydroxybenzaldehyde to an ampoule, stir and mix, seal and purge under vacuum / nitrogen 5 times. Inject 0.3mL of glacial acetic acid and 22.5mL of methanol into the ampoule using a syringe, and place it in a 50℃ oil bath for 24h. After the reaction, pour the liquid in the ampoule into 75mL of ethanol for precipitation for 15h. After precipitation, wash, filter, and vacuum dry for 24h. Add 1.5g of the obtained product and 1.2g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to the ampoule, stir and mix, seal and purge under vacuum / nitrogen 3 times. Then add 22.5mL of ethanol, heat at 80℃ for 24h, filter, and dry at 60℃ to obtain flame-retardant particles.

[0041] Q2: Add 625 mL of isoamyl acetate to a three-necked flask, purge with nitrogen to remove oxygen, then add 30.5 g of maleic anhydride and 32.5 g of styrene. After complete dissolution, add 0.5 g of azobisisobutyronitrile. Heat in a water bath to 80 °C, reflux for 8 h, centrifuge the obtained product to remove the supernatant, centrifuge at 12000 rpm for 10 min, then add 625 mL of methanol to the remaining product and stir for 1 h, centrifuge, and vacuum dry at 160 °C for 24 h to obtain the intermediate product;

[0042] Q3: Add 7.5g of intermediate product, 5.2g of ammonia water with a weight fraction of 25wt% and 112.7mL of distilled water to a sealed reagent bottle, and stir magnetically at 100℃ for 5h to obtain a polymer aqueous solution. At the same time, add 5g of flame retardant particles to the reagent bottle, add 120mL of distilled water, and stir to obtain a flame retardant aqueous solution. Add 40g of polymer aqueous solution to the reagent bottle, then add 10mL of distilled water and 30g of flame retardant aqueous solution. After stirring magnetically for 40min, pour the resulting mixture into a mold, pre-cool, freeze-dry, and heat-treat at 190℃ for 2h to obtain a flame retardant composite aerogel.

[0043] Q4: Mix 15kg of flame-retardant composite aerogel and 20kg of aggregate evenly to obtain a dry mix. Then add 46kg of cement, 2.3kg of polycarboxylate superplasticizer, and 11.5kg of hydroxypropyl cellulose ether to a mortar mixer and mix evenly. Add water and mix to obtain a uniform slurry. Add the dry mix and 5.2kg of filler to the uniform slurry in sequence and mix to obtain the thermal insulation slurry.

[0044] This embodiment discloses a method for preparing a durable coating, including the following steps:

[0045] S1: Dissolve 3g of aluminum dihydrogen phosphate powder in 12.5mL of deionized water and sonicate for 15min to obtain an aqueous solution of aluminum dihydrogen phosphate. Then disperse 4.5g of polytetrafluoroethylene propylene powder and 3g of carbon nanotubes in 12.5mL of ethanol and magnetically stir at 300rpm for 30min to obtain a dispersion system.

[0046] S2: Add 12.5 mL of aluminum dihydrogen phosphate aqueous solution dropwise to 12.5 mL of dispersion system at a dropping rate of 1 mL / min, and continue stirring for 1.5 h to obtain durable coating layer.

[0047] This embodiment discloses a method for preparing a prefabricated integrated durable thermal insulation wall panel, including the following steps:

[0048] Step (1): After the insulation slurry is poured into the mold, it is left to stand for 48 hours before demolding to obtain the insulation layer;

[0049] Step (2): Spray the durable coating onto one side of the insulation layer, then calcine the sprayed insulation layer at 320℃ for 40 minutes. After calcination, apply latex paint to the other side of the insulation layer to obtain the assembled integrated durable insulation wall panel.

[0050] Example 3

[0051] This embodiment discloses a method for preparing a thermal insulation layer slurry, including the following steps:

[0052] Q1: Add 1g of chitosan oligosaccharide and 0.77g of p-hydroxybenzaldehyde to an ampoule, stir and mix, seal and purge under vacuum / nitrogen 5 times. Inject 0.2mL of glacial acetic acid and 15mL of methanol into the ampoule using a syringe, and place it in a 50℃ oil bath for 24h. After the reaction, pour the liquid in the ampoule into 50mL of ethanol for 15h to settle. After settling, wash, filter, and vacuum dry for 24h. Add 1g of the obtained product and 0.8g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to the ampoule, stir and mix, seal and purge under vacuum / nitrogen 3 times. Then add 15mL of ethanol, heat at 80℃ for 24h, filter, and dry at 60℃ to obtain flame-retardant particles.

[0053] Q2: Add 500 mL of isoamyl acetate to a three-necked flask, purge with nitrogen to remove oxygen, then add 24.5 g of maleic anhydride and 26 g of styrene. After complete dissolution, add 0.4 g of azobisisobutyronitrile (AIBN), heat in a water bath to 80 °C, reflux for 8 h, centrifuge the obtained product to remove the supernatant, centrifuge at 12000 rpm for 10 min, then add 500 mL of methanol to the remaining product and stir for 1 h, centrifuge, and vacuum dry at 160 °C for 24 h to obtain the intermediate product;

[0054] Q3: Add 6g of intermediate product, 4.2g of ammonia water with a weight fraction of 25wt% and 89.8mL of distilled water to a sealed reagent bottle, and stir magnetically at 100℃ for 5h to obtain a polymer aqueous solution. At the same time, add 4g of flame retardant particles to the reagent bottle, add 96mL of distilled water, and stir to obtain a flame retardant aqueous solution. Add 32g of polymer aqueous solution to the reagent bottle, then add 8mL of distilled water and 24g of flame retardant aqueous solution. After stirring magnetically for 40min, pour the resulting mixture into a mold, pre-cool, freeze-dry, and heat-treat at 190℃ for 2h to obtain a flame retardant composite aerogel.

[0055] Q4: Mix 16kg of flame-retardant composite aerogel and 18kg of aggregate evenly to obtain a dry mix. Then add 44kg of cement, 2.2kg of polycarboxylate superplasticizer, and 12kg of hydroxypropyl cellulose ether to a mortar mixer and mix evenly. Add water and mix to obtain a uniform slurry. Add the dry mix and 7.8kg of filler to the uniform slurry in sequence and mix to obtain the thermal insulation slurry.

[0056] This embodiment discloses a method for preparing a durable coating, including the following steps:

[0057] S1: Dissolve 2g of aluminum dihydrogen phosphate powder in 10mL of deionized water and sonicate for 15min to obtain an aqueous solution of aluminum dihydrogen phosphate. Then disperse 3g of polytetrafluoroethylene propylene powder and 2g of carbon nanotubes in 10mL of ethanol and stir magnetically at 300rpm for 30min to obtain a dispersion system.

[0058] S2: Add 10 mL of aluminum dihydrogen phosphate aqueous solution dropwise to 10 mL of dispersion system at a dropping rate of 1 mL / min, and continue stirring for 1.5 h to obtain durable coating layer.

[0059] This embodiment discloses a method for preparing a prefabricated integrated durable thermal insulation wall panel, including the following steps:

[0060] Step (1): After the insulation slurry is poured into the mold, it is left to stand for 48 hours before demolding to obtain the insulation layer;

[0061] Step (2): Spray the durable coating onto one side of the insulation layer, then calcine the sprayed insulation layer at 320℃ for 40 minutes. After calcination, apply latex paint to the other side of the insulation layer to obtain the assembled integrated durable insulation wall panel.

[0062] Example 4

[0063] This embodiment discloses a method for preparing a thermal insulation layer slurry, including the following steps:

[0064] Q1: Add 2g of chitosan oligosaccharide and 1.54g of p-hydroxybenzaldehyde to an ampoule, stir and mix, seal and purge under vacuum / nitrogen 5 times. Inject 0.4mL of glacial acetic acid and 30mL of methanol into the ampoule using a syringe, and place it in a 50℃ oil bath for 24h. After the reaction, pour the liquid in the ampoule into 100mL of ethanol and let it settle for 15h. After settling, wash, filter, and vacuum dry for 24h. Put 2g of the obtained product and 1.6g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into an ampoule, stir and mix, seal and purge under vacuum / nitrogen 3 times. Then add 30mL of ethanol, heat at 80℃ for 24h, filter, and dry at 60℃ to obtain flame-retardant particles.

[0065] Q2: Add 750 mL of isoamyl acetate to a three-necked flask, purge with nitrogen to remove oxygen, then add 36.7 g of maleic anhydride and 39 g of styrene. After complete dissolution, add 0.6 g of azobisisobutyronitrile. Heat the mixture in a water bath to 80 °C and reflux for 8 h. Centrifuge the obtained product to remove the supernatant. Centrifuge at 12000 rpm for 10 min. Then add 750 mL of methanol to the remaining product and stir for 1 h. Centrifuge and dry under vacuum at 160 °C for 24 h to obtain the intermediate product.

[0066] Q3: Add 9g of intermediate product, 6.3g of ammonia water with a weight fraction of 25wt% and 134.7mL of distilled water to a sealed reagent bottle, and stir magnetically at 100℃ for 5h to obtain a polymer aqueous solution. At the same time, add 6g of flame retardant particles to the reagent bottle, add 144mL of distilled water, and stir to obtain a flame retardant aqueous solution. Add 48g of polymer aqueous solution to the reagent bottle, then add 12mL of distilled water and 36g of flame retardant aqueous solution. After stirring magnetically for 40min, pour the resulting mixture into a mold, pre-cool, freeze-dry, and heat-treat at 190℃ for 2h to obtain a flame retardant composite aerogel.

[0067] Q4: Mix 14kg of flame-retardant composite aerogel and 19kg of aggregate evenly to obtain a dry mix. Then add 48kg of cement, 2.4kg of polycarboxylate superplasticizer, and 11kg of hydroxypropyl cellulose ether to a mortar mixer and mix evenly. Add water and mix to obtain a uniform slurry. Add the dry mix and 5.6kg of filler to the uniform slurry in sequence and mix to obtain the thermal insulation slurry.

[0068] This embodiment discloses a method for preparing a durable coating, including the following steps:

[0069] S1: Dissolve 4g of aluminum dihydrogen phosphate powder in 15mL of deionized water and sonicate for 15min to obtain an aqueous solution of aluminum dihydrogen phosphate. Then disperse 6g of polytetrafluoroethylene propylene powder and 4g of carbon nanotubes in 15mL of ethanol and magnetically stir at 300rpm for 30min to obtain a dispersion system.

[0070] S2: Add 15 mL of aluminum dihydrogen phosphate aqueous solution dropwise to 15 mL of dispersion system at a dropping rate of 1 mL / min, and continue stirring for 1.5 h to obtain durable coating layer.

[0071] This embodiment discloses a method for preparing a prefabricated integrated durable thermal insulation wall panel, including the following steps:

[0072] Step (1): After the insulation slurry is poured into the mold, it is left to stand for 48 hours before demolding to obtain the insulation layer;

[0073] Step (2): Spray the durable coating onto one side of the insulation layer, then calcine the sprayed insulation layer at 320℃ for 40 minutes. After calcination, apply latex paint to the other side of the insulation layer to obtain the assembled integrated durable insulation wall panel.

[0074] Example 5

[0075] This embodiment discloses a method for preparing a thermal insulation layer slurry, including the following steps:

[0076] Q1: Add 1.2g of chitosan oligosaccharide and 0.89g of p-hydroxybenzaldehyde to an ampoule, stir and mix, seal and purge under vacuum / nitrogen 5 times. Inject 0.25mL of glacial acetic acid and 18mL of methanol into the ampoule using a syringe, and place it in a 50℃ oil bath for 24h. After the reaction, pour the liquid in the ampoule into 80mL of ethanol and let it settle for 15h. After settling, wash, filter, and vacuum dry for 24h. Add 1.2g of the obtained product and 0.9g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to the ampoule, stir and mix, seal and purge under vacuum / nitrogen 3 times. Then add 12mL of ethanol, heat at 80℃ for 24h, filter, and dry at 60℃ to obtain flame-retardant particles.

[0077] Q2: Add 550 mL of isoamyl acetate to a three-necked flask, purge with nitrogen to remove oxygen, then add 28.9 g of maleic anhydride and 28 g of styrene. After complete dissolution, add 0.45 g of azobisisobutyronitrile. Heat the mixture in a water bath to 80 °C and reflux for 8 h. Centrifuge the obtained product to remove the supernatant. Centrifuge at 12000 rpm for 10 min. Then add 700 mL of methanol to the remaining product and stir for 1 h. Centrifuge and dry under vacuum at 160 °C for 24 h to obtain the intermediate product.

[0078] Q3: Add 7g of intermediate product, 4.8g of ammonia water with a weight fraction of 25wt% and 95.2mL of distilled water to a sealed reagent bottle, and stir magnetically at 100℃ for 5h to obtain a polymer aqueous solution. At the same time, add 4.5g of flame retardant particles to the reagent bottle, add 113mL of distilled water, and stir to obtain a flame retardant aqueous solution. Add 36g of polymer aqueous solution to the reagent bottle, then add 9mL of distilled water and 32g of flame retardant aqueous solution. After stirring magnetically for 40min, pour the resulting mixture into a mold, pre-cool, freeze-dry, and heat-treat at 190℃ for 2h to obtain a flame retardant composite aerogel.

[0079] Q4: Mix 12kg of flame-retardant composite aerogel and 22kg of aggregate evenly to obtain a dry mix. Then add 45kg of cement, 2.3kg of polycarboxylate superplasticizer, and 11.2kg of hydroxypropyl cellulose ether to a mortar mixer and mix evenly. Add water and mix to obtain a uniform slurry. Add the dry mix and 7.5kg of filler to the uniform slurry in sequence and mix to obtain the thermal insulation slurry.

[0080] This embodiment discloses a method for preparing a durable coating, including the following steps:

[0081] S1: Dissolve 3.5g of aluminum dihydrogen phosphate powder in 11mL of deionized water and sonicate for 15min to obtain an aqueous solution of aluminum dihydrogen phosphate. Then disperse 4g of polytetrafluoroethylene propylene powder and 2.5g of carbon nanotubes in 11mL of ethanol and stir magnetically at 300rpm for 30min to obtain a dispersion system.

[0082] S2: Add 11 mL of aluminum dihydrogen phosphate aqueous solution dropwise to 14 mL of dispersion system at a dropping rate of 1 mL / min, and continue stirring for 1.5 h to obtain durable coating layer.

[0083] This embodiment discloses a method for preparing a prefabricated integrated durable thermal insulation wall panel, including the following steps:

[0084] Step (1): After the insulation slurry is poured into the mold, it is left to stand for 48 hours before demolding to obtain the insulation layer;

[0085] Step (2): Spray the durable coating onto one side of the insulation layer, then calcine the sprayed insulation layer at 320℃ for 40 minutes. After calcination, apply latex paint to the other side of the insulation layer to obtain the assembled integrated durable insulation wall panel.

[0086] Comparative Example 1

[0087] Compared with Example 2, Comparative Example 1 did not add chitosan oligosaccharide during the preparation of the thermal insulation layer slurry, while all other conditions remained unchanged.

[0088] Comparative Example 2

[0089] Compared with Example 2, Comparative Example 2 did not add isoamyl acetate during the preparation of the thermal insulation slurry, and all other conditions remained unchanged.

[0090] Comparative Example 3

[0091] Compared with Example 2, Comparative Example 3 did not add maleic anhydride during the preparation of the thermal insulation slurry, and all other conditions remained unchanged.

[0092] Comparative Example 4

[0093] Compared with Example 2, Comparative Example 4 did not add flame-retardant composite aerogel during the preparation of the thermal insulation layer slurry, while other conditions remained unchanged.

[0094] Comparative Example 5

[0095] Compared with Example 2, Comparative Example 5 did not add aluminum dihydrogen phosphate powder during the preparation of the durable coating, while all other conditions remained unchanged.

[0096] Comparative Example 6

[0097] Compared with Example 2, Comparative Example 6 did not add polytetrafluoroethylene propylene powder during the preparation of the durable coating, while all other conditions remained unchanged.

[0098] Comparative Example 7

[0099] Compared with Example 2, Comparative Example 7 did not add carbon nanotubes during the preparation of the durable coating, while all other conditions remained unchanged.

[0100] The samples prepared through Examples 2-5 and Comparative Examples 1-7 were subjected to performance tests. The insulation layer thickness was 65 mm, the durability layer thickness was 24 mm, and the interior layer thickness was 24 mm. The thermal conductivity of the samples was tested according to GB / T 10294-2008, the compressive strength according to GB / T 50107-2010, the fire resistance according to GB / T 9978.1-2008, and the durability according to GB / T 50082-2009. The test results are shown in Table 1.

[0101] Table 1

[0102]

[0103] As can be seen from the test results in Table 1, the thermal insulation wall panels prepared in Examples 2-5 of the present invention have excellent thermal insulation performance, mechanical properties, flame retardant properties and durability. Comparison of Comparative Example 1 and Examples 2-5 shows that adding chitosan oligosaccharide can effectively improve the thermal insulation and flame retardant properties of the thermal insulation wall panel; comparison of Comparative Example 2 and Examples 2-5 shows that adding isoamyl acetate can effectively improve the thermal insulation performance of the thermal insulation wall panel; comparison of Comparative Example 3 and Examples 2-5 shows that adding maleic anhydride can effectively improve the thermal insulation performance of the thermal insulation wall panel; comparison of Comparative Example 4 and Examples 2-5 shows that adding flame-retardant composite aerogel can effectively improve the thermal insulation and flame retardant properties of the thermal insulation wall panel; comparison of Comparative Example 5 and Examples 2-5 shows that adding aluminum dihydrogen phosphate powder can effectively improve the durability of the thermal insulation wall panel; comparison of Comparative Example 6 and Examples 2-5 shows that adding perfluoroethylene propylene powder can effectively improve the durability of the thermal insulation wall panel; comparison of Comparative Example 7 and Examples 2-5 shows that adding carbon nanotubes can effectively improve the durability of the thermal insulation wall panel.

[0104] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0105] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fabricated integrated durable thermal insulation wall panel, characterized in that, It comprises from inside to outside an interior layer, a thermal insulation layer and a durable layer, the interior layer is coated by latex paint, the thermal insulation layer is composed of thermal insulation layer slurry, and the durable layer is coated by durable layer paint; The preparation method of the thermal insulation layer slurry comprises the following steps: Q1: Chitosan oligosaccharide, p-hydroxybenzaldehyde and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide are used as raw materials to synthesize flame-retardant particles with flame-retardant effect through a combination of substitution reaction and radial polymerization; Q2: Isopentyl acetate and maleic anhydride are used as raw materials to synthesize an intermediate product through a self-stabilizing precipitation polymerization method; Q3: The flame-retardant particles and the intermediate product are mixed and stirred, and then freeze-dried to obtain flame-retardant composite aerogel; Q4: Cement, flame-retardant composite aerogel, aggregate, polycarboxylate superplasticizer, hydroxypropyl cellulose ether and filler are used as raw materials to prepare the thermal insulation layer slurry through mixing and stirring; The preparation method of the durable layer paint comprises the following steps: S1: Dissolve aluminum dihydrogen phosphate powder in deionized water to obtain an aluminum dihydrogen phosphate aqueous solution, then disperse polyperfluoroethyl propylene powder and carbon nanotubes in ethanol, and magnetically stir to obtain a dispersion system; S2: Drop the aluminum dihydrogen phosphate aqueous solution into the dispersion system, and continue to stir to obtain the durable layer paint.

2. The assembled integrated durable thermal wall panel according to claim 1, wherein, The Q1 is specifically: (1) Chitosan oligosaccharide and p-hydroxybenzaldehyde are added to an ampoule, stirred and mixed, sealed and vacuum / nitrogen circulation purged for 3-5 times, ice acetic acid and methanol are injected into the ampoule through a syringe, and the ampoule is placed in an oil bath at 40-50 DEG C for substitution reaction for 18-24h, after the reaction is completed, the liquid in the ampoule is poured into ethanol for sedimentation for 12-15h, and then sequentially washed, suction filtered and vacuum dried for 20-24h to obtain the product; wherein the amount ratio of chitosan oligosaccharide, p-hydroxybenzaldehyde, ice acetic acid, methanol and ethanol is (1-2) g: (0.77-1.54) g: (0.2-0.4) mL: (15-30) mL: (50-100) mL; (2) The obtained product and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide are placed in an ampoule, stirred and mixed, sealed and vacuum / nitrogen circulation purged for 3-5 times, then ethanol is added, heated to 80-90 DEG C for reaction for 18-24h, filtered and dried at 60-70 DEG C to obtain flame-retardant particles; the amount ratio of product, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ethanol is (1-2) g: (0.8-1.6) g: (15-30) mL.

3. The assembled integrated durable thermal wall panel according to claim 1, wherein, The Q2 is specifically: Isopentyl acetate is added to a three-necked flask, and nitrogen is introduced to remove oxygen; Then maleic anhydride and styrene are added, and after complete dissolution, azobisisobutyronitrile is added, and the water bath is heated to 70-80 DEG C, and condensation reflux is carried out for 7-9h, and the obtained product is centrifuged at a speed of 10000-12000 rpm for 10-15 min to remove the supernatant; Methanol is added to the remaining product and stirred for 0.5-1h, centrifuged and vacuum dried at 140-160 DEG C for 20-24h to obtain the intermediate product; The amount ratio of isopentyl acetate, maleic anhydride, styrene, azobisisobutyronitrile and methanol is (500-750) mL:(24.5-36.7) g:(26-39) g:(0.4-0.6) g:(500-750) mL.

4. The prefabricated integrated durable thermal insulation wall panel according to claim 1, characterized in that, The Q3 is specifically: The intermediate product, ammonia water and distilled water are added into a sealed reagent bottle, and magnetic stirring is carried out at a temperature of 90-100℃ for 3-5h to obtain a polymer aqueous solution; The flame-retardant particles are added into a reagent bottle, and distilled water is added to obtain a flame-retardant aqueous solution by stirring; The polymer aqueous solution is added into a reagent bottle, and then distilled water and the flame-retardant aqueous solution are added, and magnetic stirring is carried out for 30-40min, and then the obtained mixture solution is poured into a mold, pre-cooling, freeze-drying, and heat treatment at a temperature of 180-190℃ for 2-4h to obtain a flame-retardant composite aerogel; The amount ratio of the intermediate product, ammonia water and distilled water is (6-9) g:(4.2-6.3) g:(89.8-134.7) mL, and the weight fraction of the ammonia water is 25wt%; the amount ratio of the flame-retardant particles and distilled water is (4-6) g:(96-144) mL, and the amount ratio of the polymer aqueous solution, distilled water and flame-retardant aqueous solution is (32-48) g:(8-12) mL:(24-36) g. 5.The prefabricated integrated durable thermal insulation wall panel according to claim 1, characterized in that, The Q4 is specifically: The flame-retardant composite aerogel and aggregate are stirred uniformly to obtain dry mixture; The cement, polycarboxylic acid water reducer and hydroxypropyl cellulose ether are added into a mortar mixer, and stirring is carried out until uniform, and then water is added and stirred to obtain a uniform slurry; The dry mixture and filler are sequentially added into the uniform slurry, and stirring and mixing are carried out to obtain a thermal insulation layer slurry; The weight ratio of the flame-retardant composite aerogel, aggregate, cement, polycarboxylic acid water reducer, hydroxypropyl cellulose ether and filler is (10-20):(18-22):(44-48):(2.2-2.4):(11-12):(2-8.8).

6. The prefabricated integrated durable thermal wall panel according to claim 1, wherein, In the S1, the amount ratio of the aluminum dihydrogen phosphate powder and deionized water is (2-4) g:(10-15) mL, the ultrasonic treatment time is 10-15min, the amount ratio of the polyperfluoroethyl propylene powder, carbon nanotube and ethanol is (3-6) g:(2-4) g:(10-15) mL, the magnetic stirring speed is 200-300rpm, and the stirring time is 20-30min; in the S2, the volume ratio of the aluminum dihydrogen phosphate aqueous solution and dispersion system is (10-15) mL:(10-15) mL, the dropping speed is 1mL / min, and the stirring time is 1-2h.

7. The method of claim 1-6, wherein the method further comprises the steps of: providing a plurality of metal plates; providing a plurality of metal connectors; and connecting the plurality of metal plates to the plurality of metal connectors. The method comprises the following steps: Step (1): the thermal insulation layer slurry is demolded after being molded to obtain a thermal insulation layer; Step (2): the durable layer coating is sprayed on one side of the thermal insulation layer, and then the sprayed thermal insulation layer is calcined at high temperature, and after the calcination is completed, the emulsion paint is squeegeed on the other side of the thermal insulation layer to obtain an assembled integrated durable thermal insulation wallboard.

8. The method for preparing the prefabricated integrated durable thermal insulation wall panel according to claim 7, characterized in that, In the step (1), the standing time is 48-52h; in the step (2), the high-temperature calcination temperature is 300-320℃, and the time is 40-60min.

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