CN107344844B - Graphene EPS fireproof insulation board and preparation method thereof - Google Patents
Graphene EPS fireproof insulation board and preparation method thereof Download PDFInfo
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- CN107344844B CN107344844B CN201710667429.XA CN201710667429A CN107344844B CN 107344844 B CN107344844 B CN 107344844B CN 201710667429 A CN201710667429 A CN 201710667429A CN 107344844 B CN107344844 B CN 107344844B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention relates to the field of fireproof heat-insulating materials, and in particular relates to a graphene EPS fireproof heat-insulating board and a preparation method thereof. The method for preparing the graphene EPS fireproof insulation board comprises the following steps: and (3) physically foaming the cementing material, mixing with the graphene EPS, and rolling and molding. The volume ratio of the cementing material to the graphene EPS is 100: 65-85. This fire prevention heated board has good heat preservation effect, has good fire behavior simultaneously, promotes the security of heated board.
Description
Technical Field
The invention relates to the field of fireproof heat-insulating materials, and in particular relates to a graphene EPS fireproof heat-insulating board and a preparation method thereof.
Background
The existing A-grade heat insulation materials such as rock wool heat insulation boards are not environment-friendly and have poor weather resistance, are difficult to construct and easy to absorb water to fall off, the foamed cement heat insulation boards have high heat conductivity coefficient and are difficult to adapt to some buildings with high national energy-saving requirements, magnesium oxychloride cement is mostly adopted as homogeneous boards, namely the production of ordinary EPS, the defects are that the foamed cement heat insulation boards are easy to resist halogen and alkali deformation, and various defects exist, foamed glass and foamed ceramics also belong to materials with high heat conductivity coefficient, although the materials can play a role in fire prevention, the energy-saving effect is general, the existing B-grade materials such as molded EPS (expanded polystyrene) plastic extruded boards, phenolic boards and the like are all organic materials, although the heat insulation effect is superior, the due fire resistance cannot be achieved, fire disasters are easy to occur, and.
Disclosure of Invention
The invention aims to provide a graphene EPS fireproof insulation board which has an excellent insulation effect and good fireproof performance and improves the safety of the insulation board.
The invention also aims to provide a method for preparing the graphene EPS fireproof insulation board, which is short in steps and simple to operate, and can be used for quickly and efficiently preparing the graphene EPS fireproof insulation board.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the invention provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps: and (3) physically foaming the cementing material, mixing with the graphene EPS, and rolling and molding. The volume ratio of the cementing material to the graphene EPS is 100: 65-85.
The invention provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
The graphene EPS fireproof insulation board and the preparation method thereof have the beneficial effects that: the volume ratio of the binding material to the graphene EPS of the fireproof insulation board is 100: 65-85 by mixing. Will be provided with
The grade graphene EPS is upgraded to A2 grade, so that a better fireproof and flame-retardant effect is achieved. Meanwhile, the heat insulation effect is good. Meanwhile, the casting material is an air-hardening cementing material, has good stability in air, is safe, nontoxic and tasteless in use, good in processability, convenient to use, simple in production process, easy to produce, energy-saving and low in consumption, high in waste utilization rate, wide in application field and wide in product range.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
The graphene EPS fireproof insulation board and the preparation method thereof according to the embodiment of the invention are specifically described below.
The embodiment of the invention provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparing a cementing material;
the gelled material is mainly prepared from magnesium sulfate solution, magnesium oxide, sulfuric acid, a filler, a stearic acid compound and a modifier according to the mass ratio of 1:0.8-0.9: 0.005-0.008: 0.2-0.6: 0.015-0.02: 0.01-0.02.
Specifically, firstly, magnesium sulfate solution, magnesium oxide, sulfuric acid, filler, water repellent agent and modifier are mixed according to the mass ratio of 1:0.8-0.9: 0.005-0.008: 0.2-0.6: 0.015-0.02:0.01-0.02, and mixing uniformly. It is preferable to mix the magnesium sulfate solution, the modifier, the sulfuric acid, the filler, the magnesium oxide, and the water repellent agent in this order. Firstly, the magnesium sulfate solution is mixed with the modifier and then is mixed with the sulfuric acid, so that the magnesium sulfate is modified firstly, and the performance of the magnesium sulfate is improved, and then the magnesium sulfate solution is mixed with the filler, the magnesium oxide and the water repellent agent, so that the prepared gel material has good waterproofness and strength.
The magnesium sulfate solution and the magnesium oxide are mixed and react to form a magnesium oxide-magnesium sulfate-water ternary gelling system, and a part of magnesium oxide is generated to form a magnesium hydroxide gel in the gelling system. The sulfuric acid provides sufficient sulfate radicals for the gelling system, so that the content of the sulfate radicals in the gelling system is ensured, and the strength of the gelling material is further improved. Meanwhile, magnesium sulfate and sulfuric acid can promote magnesium oxide to be dissolved and hydrated, the content of magnesium hydroxide colloid is increased, and the strength of the cementing material is improved. The filler can further improve the strength, water resistance and wear resistance of the cementing material, and comprehensively strengthen various properties of the cementing material. The water-resistant agent can also act with a gelling system in the gelling material, so that the water resistance of the gelling material is improved. Meanwhile, the modifier interacts with the filler, the water repellent agent, the gelling system and the like, so that the gelling material cannot collapse, crack and expand.
The proportion can ensure that the interaction effect among the magnesium sulfate solution, the magnesium oxide, the modifier, the water repellent agent, the sulfuric acid and the filler is optimal, namely the obtained gelled material has optimal performance and excellent impermeability, crack resistance and deformation resistance. If the proportion of the substances is not in the range, the prepared cementing material has poor bonding performance, poor cracking resistance and poor impermeability, and the situations of halogen return, blooming and the like are easy to occur.
Magnesium sulfate is a magnesium-containing compound, anhydrous magnesium sulfate is a common chemical reagent and drying reagent, but magnesium sulfate is often referred to as magnesium sulfate heptahydrate and is white fine inclined or columella crystals. After being dissolved in water, the magnesium sulfate can react with the light calcined powder to form magnesium oxysulfate cement. The main function of magnesium sulfate in the examples of the present invention is to provide the main raw material of the cementitious material, which is necessary for the cementitious system.
Magnesium oxide is an oxide of magnesium, an ionic compound, and belongs to a gelled material. Magnesite (MgCO)3) Dolomite (MgCO)3·CaCO3) And seawater is the main raw material for producing magnesium oxide. The magnesite or dolomite is thermally decomposed to obtain magnesium oxide. Magnesium oxide, which in the present example provides the most basic reactant for the cementitious material, is capable of reflecting to colloidal magnesium hydroxide and at the same time forms a cementitious system with magnesium sulfate, which in turn provides excellent strength and wear resistance properties to the cementitious material after it has hardened.
The most important oxyacids of sulfur sulfates. The anhydrous sulfuric acid is colorless oily liquid and crystallizes at 10.36 deg.C, and the pure sulfuric acid is colorless oily liquid with density of 1.84g/cm3The boiling point is 337 ℃, the water can be mutually dissolved in any proportion, and simultaneously a great deal of heat is released to boil the water. The main function of the sulfuric acid in the embodiment of the invention is that the sulfuric acid can release heat when being dissolved, so that the formation of a gelling system is promoted, and meanwhile, the sulfuric acid provides enough sulfate radicals for the gelling system, so that the strength of the gelling system is improved.
Further, the magnesium oxide is light-burned magnesium oxide. Light-burned magnesia, also known as caustic bitter soil and active magnesia, is a mixture of caustic magnesia and active magnesiaMagnesite, brucite and magnesium hydroxide Mg (OH) extracted from sea water or brine2And calcining at 700-1000 ℃ to obtain the light calcined magnesia.
Furthermore, the weight ratio of magnesium in the light-burned magnesia is more than 85 percent, and the activity of the light-burned magnesia is between 60 and 65. The mass ratio of magnesium in the light-burned magnesia and the activity degree of the light-burned magnesia are between 60 and 65, so that the light-burned magnesia has good activity, the reaction is more sufficient, and the strength of the obtained cementing material is better. If the mass ratio of magnesium or the activity of the lightly calcined magnesium oxide is lower than the above range, the activity of the lightly calcined magnesium oxide may be insufficient, and the strength of the resulting cement may be insufficient, thereby degrading the properties of each component of the cement. If the mass ratio of magnesium or the activity of the lightly calcined magnesia is higher than the above range, the activity of the lightly calcined magnesia may be too strong, and the strength of the prepared cement material may be too high, so that the cement material may be brittle, and the performance of the cement material may be reduced, thereby reducing the application range of the cement material.
Further, the baume degree of the magnesium sulfate solution is 20-30 degrees. Baume is one method of expressing the concentration of a solution. The magnesium sulfate solution is prepared by mixing magnesium sulfate and water, specifically, the magnesium sulfate is dissolved in the water, so that the subsequent reaction of the magnesium sulfate and magnesium oxide is facilitated, meanwhile, the water is used as a dissolving solvent at the same time, and the water is not only used as a solvent for dissolving the magnesium oxide or used as a reactant for the reaction when the subsequent reaction of the magnesium sulfate and the magnesium oxide is carried out.
Further, the mass concentration of the sulfuric acid is 28-30%. The sulfuric acid with the mass concentration can further improve the strength of the cementing material, and ensure that the cementing material is not easy to deform and crack. Meanwhile, the addition of sulfuric acid makes the cementing material difficult to return to halogen and bloom.
Furthermore, the fineness of the filler is larger than 200 meshes, and the fineness of the filler is within the range, so that the filler can be fully mixed with a cementing system, the prepared cementing material has good fineness, and the strength of the cementing material is improved.
Further, the filler is selected from fly ash, mineral powder or stone powderAny one or more of. The fly ash, the mineral powder and the stone powder can increase the strength of the cementing material and can solve the problem that the cementing material absorbs water and gets damp. The fly ash, the mineral powder and the stone powder can further act with a gelling system formed by magnesium sulfate and magnesium oxide, so that the strength, the impermeability, the waterproofness and other properties of the gelling material are improved. Fly ash is fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from a coal-fired power plant. The main oxide composition of the fly ash of the thermal power plant in China is as follows: SiO 22、Al2O3、FeO、Fe2O3、CaO、TiO2And the like. The mineral powder is obtained by crushing mined ores, and the stone powder is obtained by crushing stones.
Further, the water-repellent agent includes any one or more of stearic acid, calcium stearate, or zinc stearate. The water-resistant agent is added, so that the water resistance of the cementing material can be effectively improved, the cementing material is not easy to absorb water and get damp, and the stability of the cementing material is ensured. Stearic acid, octadecanoic acid, structurally simple formula: CH (CH)3(CH2)16COOH, produced by hydrolysis of fats and oils, mainly used for the production of stearates. The product can be used as cold-resistant plasticizer, release agent, stabilizer, surfactant, and rubber vulcanization accelerator for plastics. The main function of the embodiment of the invention is to prevent water and prevent the cementing material from absorbing water and getting damp.
The calcium stearate is white powder, insoluble in water, cold ethanol and diethyl ether, soluble in organic solvents such as hot benzene, benzene and turpentine, and slightly soluble in hot ethanol and diethyl ether. Heating to 400 deg.C, slowly decomposing, and burning, and decomposing into stearic acid and corresponding calcium salt when encountering strong acid, and having hygroscopicity.
Zinc stearate, white powder, insoluble in water, soluble in hot organic solvents such as ethanol, benzene, toluene, turpentine, etc.; encounter decomposition of the acid into stearic acid and the corresponding salt; the fire hazard exists under the dry condition, and the self-ignition point is 900 ℃; it has hygroscopic property. Mainly used as a lubricant and a release agent of styrene resin, phenolic resin and amino resin. Meanwhile, the rubber also has the functions of a vulcanization activator and a softener.
Further, the modifying agent includes any one or more of phosphoric acid, citric acid, trisodium phosphate, boric acid, triethanolamine, or water. The addition of the above substances as a modifier can effectively inhibit the expansion of the cementing material, inhibit the halogenation of the cementing material, improve the water resistance of the cementing material, increase the crack resistance of the cementing material and make up for the defects of the cementing material.
And then molding the mixture obtained by mixing, wherein the molding adopts the existing one-step molding by rolling.
Further, in order to ensure that the performance of the prepared cementing material is in a good state before the cementing material is not used, the prepared cementing material needs to be maintained, specifically, the maintenance mode is constant-temperature maintenance, the constant-temperature maintenance temperature is 15-60 ℃, and the constant-temperature maintenance time is 2-3 hours. Too low or too high curing temperature can affect the quality stability of the cementing material and the overall quality of the cementing material. The performance of the cementing material for inhibiting halogen return and blooming is improved in the temperature range, and the comprehensive quality of the aerated cementing material is further improved.
S2, physically foaming the cementing material;
physical foaming is a process by which the material is made cellular by the volatiles or volatiles dispersed in the material during the forming process. The foaming of the gel material can be easily and uniformly mixed with the subsequent graphene EPS due to the pores formed in the gel material, so that the fireproof heat-insulation board for the graphene EPS can be more favorably used for achieving the fireproof heat-insulation effect.
Specifically, a blowing agent is first prepared from a surfactant and water in a ratio of 1: mixing at a volume ratio of 45-75, mixing in a foaming machine with a pressure of 0.6-1.0Mpa to generate foam, and mixing with the cementing material under stirring. The mass ratio of the mixed gelled material and the foaming agent is 200-250: 1.
By adopting the operation and the proportion, the gel material can be rapidly foamed, and the physical foaming effect of the gel material can be ensured, so that the gel material is fully foamed, and the graphene EPS fireproof insulation board has a good insulation effect.
S3, preparing a graphene EPS fireproof heat-insulation board;
mixing the foamed cementing material with the graphene EPS, wherein the volume ratio of the adopted cementing material to the graphene EPS is 100: 65-85. Cementing material and graphite alkene EPS adopt to make graphite alkene EPS fire prevention heated board have good coefficient of heat conductivity, make the fire prevention heated board can play fabulous fire prevention and heat preservation effect then. If the ratio of the fireproof heat-insulating board to the heat-insulating board is not within the range of the embodiment of the invention, the fireproof performance and the heat-insulating performance of the fireproof heat-insulating board can be reduced sharply, and even part of the performance disappears.
Graphene EPS is an EPS modified by using graphene, EPS is an english abbreviation of polystyrene foam, and polystyrene foam is a light high-molecular polymer.
And mixing the foamed cementing material with the graphene EPS, and rolling and molding at one time by using a molding machine to obtain the graphene EPS fireproof insulation board.
And curing after molding, wherein the specific curing mode is constant-temperature curing, the constant-temperature curing temperature is 15-60 ℃, and the constant-temperature curing time is 3-5 days. The temperature of maintenance is crossed lowly or too high and all can influence the stability of quality of fire prevention heated board, influences the whole quality that adds graphite alkene EPS fire prevention heated board. The comprehensive quality of the graphene EPS fireproof insulation board can be further improved within the temperature range.
The embodiment of the invention also provides the graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
According to the graphene EPS fireproof insulation board and the preparation method thereof, provided by the invention, the graphene EPS fireproof insulation board can meet the non-combustible A-level fireproof requirement, the heat value is extremely low, the fireproof quality loss is extremely low, the combustion rate is also extremely low, and the fireproof insulation board has an excellent fireproof effect. Meanwhile, the fireproof insulation board has good compressive strength, good anti-permeability performance and good crack resistance. The method for preparing the graphene EPS fireproof insulation board is simple to operate, short in steps, easy in obtaining of raw materials and easy in realization of reaction conditions.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the gelled material is mainly made of 1g of magnesium sulfate solution, 0.8g of magnesium oxide, 0.005g of 28% sulfuric acid by mass concentration, 0.2g of filler, 0.018g of water repellent agent and 0.02g of modifier. Wherein the fineness of the filler is 300 meshes, and the filler is fly ash; the modifier is phosphoric acid; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 90%, and the activity degree of the light-burned magnesium oxide is 60; the water repellent agent is stearic acid; the baume degree of the magnesium sulfate solution was 20 degrees.
Specifically, 1g of magnesium sulfate solution, 0.02g of modifier, 0.005g of sulfuric acid, 0.2g of filler, 0.8g of magnesium oxide and 0.018g of water repellent agent are mixed in sequence, then are rolled and molded, and are maintained at the constant temperature of 20 ℃ for 2 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:45, then mixing in a foaming machine with the pressure set to be 1.0Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the mixed gelled material and the foaming agent is 200: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 65, mixing the raw materials, and rolling the mixture by a forming machine to form the product in one step. Then maintaining for 3 days at constant temperature under the condition of 30 ℃.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 2
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the gelled material is mainly made of 1g of magnesium sulfate solution, 0.85g of magnesium oxide, 0.008g of sulfuric acid with the mass concentration of 30%, 0.4g of filler, 0.015g of water repellent agent and 0.015g of modifier. Wherein, the fineness of the filler is 400 meshes, and the filler is fly ash and stone powder; the modifier is citric acid and boric acid; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 95%, and the activity degree of the light-burned magnesium oxide is 64; the water repellent agent is prepared by mixing stearic acid and calcium stearate; the baume degree of the magnesium sulfate solution was 25 degrees.
Specifically, 1g of magnesium sulfate solution, 0.015g of modifier, 0.008g of sulfuric acid, 0.4g of filler, 0.85g of magnesium oxide and 0.015g of water repellent agent are mixed in sequence, then are rolled and molded, and are maintained at the constant temperature of 15 ℃ for 3 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:50, then mixing in a foaming machine with the pressure set to be 0.6Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the gelled material to the foaming agent is 250: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 85, passing through a forming machine, and rolling for one-time forming. Then maintaining for 4 days at the constant temperature of 15 ℃.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 3
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the cement was mainly made of 1g of magnesium sulfate solution, 0.9g of magnesium oxide, 0.006g of 29% sulfuric acid by mass, 0.6g of filler, 0.02g of water repellent agent and 0.013g of modifier. Wherein the fineness of the filler is 250 meshes, and the filler is formed by mixing fly ash, mineral powder and stone powder; the modifier is triethanolamine; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 85%, and the activity degree of the light-burned magnesium oxide is 65; the water repellent agent is zinc stearate; the baume degree of the magnesium sulfate solution was 30 degrees.
Specifically, 1g of magnesium sulfate solution, 0.013g of modifier, 0.006g of sulfuric acid, 0.6g of filler, 0.9g of magnesium oxide and 0.02g of water repellent agent are mixed in sequence, then the mixture is rolled and molded, and then the mixture is maintained at the constant temperature of 60 ℃ for 2 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:75, then mixing in a foaming machine with the pressure set to be 0.7Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the mixed gelled material and foaming agent is 220: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 75, mixing, passing through a forming machine, and rolling for one-time forming. Then maintaining the mixture at the constant temperature of 60 ℃ for 5 days.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 4
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the cementing material is mainly prepared from 1g of magnesium sulfate solution, 0.83g of magnesium oxide, 0.007g of sulfuric acid with the mass concentration of 30%, 0.5g of filler, 0.017g of water-resistant agent and 0.01g of modifier. Wherein the fineness of the filler is 350 meshes, and the filler is a mixture of mineral powder and stone powder; the modifier is prepared by mixing phosphoric acid, citric acid, trisodium phosphate and boric acid; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 99%, and the activity degree of the light-burned magnesium oxide is 62; the water repellent agent is prepared by mixing stearic acid, calcium stearate and zinc stearate; the baume degree of the magnesium sulfate solution was 27 degrees.
Specifically, 1g of magnesium sulfate solution, 0.01g of modifier, 0.007g of sulfuric acid, 0.5g of filler, 0.83g of magnesium oxide and 0.017g of water repellent agent are mixed in sequence, then are subjected to roll forming, and then are maintained at the constant temperature of 30 ℃ for 2.5 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:60, then mixing in a foaming machine with the pressure set to be 0.8Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the gelled material to the foaming agent is 240: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 70, and rolling and molding the mixture in a molding machine for one time. Then maintaining the mixture at the constant temperature of 45 ℃ for 3.5 days.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 5
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the binding material is mainly prepared from 1g of magnesium sulfate solution, 0.87g of magnesium oxide, 0.0055g of 28% sulfuric acid by mass concentration, 0.3g of filler, 0.019g of water-resistant agent and 0.017g of modifier. Wherein the fineness of the filler is 500 meshes, and the filler is stone powder; the modifier is prepared by mixing triethanolamine and water; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 91%, and the activity of the light-burned magnesium oxide is 63; the water repellent agent is calcium stearate; the baume degree of the magnesium sulfate solution was 23 degrees.
Specifically, 1g of magnesium sulfate solution, 0.017g of modifier, 0.0055g of sulfuric acid, 0.3g of filler, 0.87g of magnesium oxide and 0.019g of water repellent agent are mixed in sequence, then are subjected to roll forming, and then are maintained at the constant temperature of 50 ℃ for 2.5 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:65, then mixing in a foaming machine with the pressure set to be 0.9Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the gelled material to the foaming agent was 210: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 80, and rolling and molding the mixture in a molding machine for one time. Then maintaining for 4.5 days at the constant temperature of 50 ℃.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 6
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the gelled material was mainly made of 1g of magnesium sulfate solution, 0.82g of magnesium oxide, 0.0065g of 28% by mass sulfuric acid, 0.4g of filler, 0.015g of water repellent agent and 0.014g of modifier. Wherein the fineness of the filler is 450 meshes, and the filler is obtained by mixing mineral powder and stone powder; the modifier is prepared by mixing citric acid, trisodium phosphate, boric acid and triethanolamine; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 97%, and the activity degree of the light-burned magnesium oxide is 65; the water repellent agent is prepared by mixing calcium stearate and zinc stearate; the baume degree of the magnesium sulfate solution was 22 degrees.
Specifically, 1g of magnesium sulfate solution, 0.014g of modifier, 0.0065g of sulfuric acid, 0.4g of filler, 0.82g of magnesium oxide and 0.015g of water repellent agent are mixed in sequence, then are rolled and molded, and are maintained at the constant temperature of 30 ℃ for 3 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:70, then mixing in a foaming machine with the pressure set to be 0.8Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the gelled material to the foaming agent is 230: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 68, and rolling and molding the mixture in a molding machine for one time. Then maintaining the mixture at the constant temperature of 25 ℃ for 3 days.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Example 7
The embodiment provides a method for preparing a graphene EPS fireproof insulation board, which comprises the following steps:
s1, preparation of the cementing material:
the gel material is mainly prepared from 1g of magnesium sulfate solution, 0.88g of magnesium oxide, 0.0075g of 29% sulfuric acid by mass concentration, 0.45g of filler, 0.017g of water-resistant agent and 0.019g of modifier. Wherein the fineness of the filler is 420 meshes, and the filler is stone powder; the modifier is prepared by mixing phosphoric acid, triethanolamine and water; the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is 87%, and the activity degree of the light-burned magnesium oxide is 63; the water repellent agent is stearic acid and calcium stearate; the baume degree of the magnesium sulfate solution was 22 degrees.
Specifically, 1g of magnesium sulfate solution, 0.019g of modifier, 0.0075g of sulfuric acid, 0.45g of filler, 0.88g of magnesium oxide and 0.017g of water repellent agent are mixed in sequence and then are subjected to roll forming, and then are maintained at the constant temperature of 55 ℃ for 2.2 hours.
S2, physical foaming of the cementing material:
firstly, mixing a surfactant and water in a volume ratio of 1:55, then mixing in a foaming machine with the pressure set to be 1.0Mpa to generate foam, and then mixing and stirring uniformly with a cementing material. The mass ratio of the mixed gelled material and foaming agent is 225: 1.
S3, preparing a graphene EPS fireproof heat-insulation board;
the volume ratio of the cementing material to the graphene EPS is 100: 78, and rolling the mixture by a forming machine to form the product in one step. Then maintaining for 4 days at the constant temperature of 40 ℃.
The embodiment also provides a graphene EPS fireproof insulation board which is prepared by the method for preparing the graphene EPS fireproof insulation board.
Examples of the experiments
Comparative example 1: the expanded cementing material and the graphene EPS are mixed according to the volume ratio of 100:50 to prepare the graphene EPS fireproof insulation board, and the rest of operation conditions, operation methods and preparation of related substances are consistent with the operation of the embodiment 1.
Comparative example 2: the expanded cementing material and the graphene EPS are mixed according to the volume ratio of 100:90 to prepare the graphene EPS fireproof insulation board, and the rest of operation conditions, operation methods and preparation of related substances are consistent with the operation of the embodiment 1.
Experimental example 1
The fireproof performance of the graphene EPS fireproof insulation boards prepared in the embodiments 1-7 and the comparative examples 1-2 is detected, the specific operation is shown in GB 8624-.
TABLE 1 results of testing fire resistance
According to the results in the table 1, the graphene EPS fireproof insulation boards prepared in the embodiments 1 to 7 achieve non-combustible A-level fire prevention, the national heat value standard is less than or equal to 2 MJ/kg, and the heat value of the graphene EPS fireproof insulation board in the embodiment of the invention is at least lower than 0.34 MJ/kg. The national standard of mass loss is less than or equal to 50%, and the mass loss of the graphene EPS fireproof insulation board provided by the embodiment of the invention is only 9.4% at most. The burning rate is less than or equal to 20 seconds in the national standard, and the burning rate of the graphene EPS fireproof insulation board provided by the embodiment of the invention is less than 2 seconds. The graphene EPS fireproof insulation board prepared by the embodiment of the invention has excellent fireproof performance. Meanwhile, the experimental results of the comparative example 1, the comparative example 1 and the comparative example 2 show that the fireproof effect of the prepared graphene EPS fireproof insulation board disappears due to the change of the proportion of the binding material to the graphene EPS.
Experimental example 2
The detection of the compression resistance and the heat conductivity coefficient of the graphene EPS fireproof insulation boards prepared in the embodiments 1-7 and the comparative examples 1-2 is carried out, the specific operations are respectively referred to GB/T5072-.
TABLE 2 test results of compressive properties and thermal conductivity
According to table 2, the enterprise standard of the compressive strength is greater than or equal to 0.2 mpa, and the compressive strength of the graphene EPS fireproof insulation board provided by the embodiment of the invention is at least 2.4 mpa. The enterprise standard of the thermal conductivity coefficient is less than or equal to 0.05, and the thermal conductivity coefficient of the graphene EPS fireproof insulation board provided by the embodiment of the invention is less than 0.02. Therefore, the graphene EPS fireproof insulation board prepared by the invention has good compression resistance and low heat conductivity coefficient, and the thermal insulation effect of the graphene EPS fireproof insulation board prepared by the embodiment of the invention is excellent. The detection results of the comparative example 1, the comparative example 1 and the comparative example 2 show that the heat preservation effect of the produced fireproof heat preservation plate is reduced sharply by changing the proportion of the cementing material to the graphene EPS.
To sum up, in the graphene EPS fireproof insulation board and the preparation method thereof provided in embodiments 1 to 7 of the present invention, the graphene EPS fireproof insulation board is prepared by adding a gelling material to graphene EPS, and adding B1The grade B graphene EPS is upgraded to grade A2, so that a better fireproof and flame-retardant effect is achieved. Meanwhile, the heat insulation effect is good.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (9)
1. A method for preparing a graphene EPS fireproof insulation board is characterized by comprising the following steps: after physical foaming, a cementing material is mixed with graphene EPS and then is rolled and molded, wherein the volume ratio of the cementing material to the graphene EPS is 100: 65-85 parts of; the gelled material is mainly prepared from magnesium sulfate solution, magnesium oxide, sulfuric acid, a filler, a stearic acid compound and a modifier according to the mass ratio of 1:0.8-0.9: 0.005-0.008: 0.2-0.6: 0.015-0.02: 0.01-0.02.
2. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the gel material and the graphene EPS are cured after being molded.
3. The method for preparing the graphene EPS fireproof insulation board according to claim 2, wherein the curing treatment is constant-temperature curing of the gel material and a substance obtained by molding the graphene EPS at 16-35 ℃.
4. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the modifier comprises any one or more of phosphoric acid, citric acid, trisodium phosphate, boric acid, triethanolamine or water.
5. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the magnesium oxide is light-burned magnesium oxide, the mass ratio of magnesium in the light-burned magnesium oxide is more than 85%, and the activity of the light-burned magnesium oxide is more than 60%.
6. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the mass concentration of sulfuric acid is 28% -30%.
7. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the stearic acid compound comprises any one or more of stearic acid, calcium stearate or zinc stearate.
8. The method for preparing the graphene EPS fireproof insulation board according to claim 1, wherein the baume degree of the magnesium sulfate solution is 20-30 degrees.
9. A graphene EPS fireproof insulation board is characterized by being prepared by the method for preparing the graphene EPS fireproof insulation board according to any one of claims 1 to 8.
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| CN102276203A (en) * | 2011-06-07 | 2011-12-14 | 王建国 | Antiflaming graphite polystyrene insulation board and preparation method thereof |
| CN106587898A (en) * | 2017-01-06 | 2017-04-26 | 中国科学院青岛生物能源与过程研究所 | Magnesium-based composite fireproof heat-insulation plate and preparation method thereof |
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| CN102276203A (en) * | 2011-06-07 | 2011-12-14 | 王建国 | Antiflaming graphite polystyrene insulation board and preparation method thereof |
| CN106587898A (en) * | 2017-01-06 | 2017-04-26 | 中国科学院青岛生物能源与过程研究所 | Magnesium-based composite fireproof heat-insulation plate and preparation method thereof |
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