CN114085061B - Composite flame-retardant insulation board and preparation method and application thereof - Google Patents
Composite flame-retardant insulation board and preparation method and application thereof Download PDFInfo
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide 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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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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 provides a composite flame-retardant insulation board and a preparation method and application thereof, and is characterized in that the composite flame-retardant insulation board comprises the following components in percentage by mass: 60-80 parts of sodium-based montmorillonite, 1-5 parts of ZIF-67/graphene-based composite filler, 5-10 parts of organic silicon flame retardant, 5-10 parts of nitrogen-phosphorus flame retardant and 5-15 parts of binder. The composite flame-retardant insulation board provided by the invention has the advantages of low heat conductivity coefficient, light volume weight, low water absorption, strong anti-permeability, good flame-retardant property and stable pore structure.
Description
Technical Field
The invention relates to a composite flame-retardant insulation board, in particular to a preparation method and application of the composite flame-retardant insulation board.
Background
The building area of newly built buildings in urban and rural areas is nearly 20 hundred million square meters every year in China, wherein more than 80 percent of buildings with high energy consumption are buildings with high energy consumption; the existing buildings are about 400 hundred million square meters, and more than 95 percent of the buildings are high-energy-consumption buildings. At present, the energy consumption of the unit building area in China is more than 2-3 times of that of developed countries, so the force for promoting energy conservation and emission reduction is gradually increased. Standard plans for saving 65% of energy of public buildings are formulated in succession in provinces and cities of China, and under the condition of strictly executing national energy-saving standards, the heat preservation of building walls is more important. The heat dissipated by the building wall is about 20% of the total heat dissipating capacity of the building, and the heat absorbed by the outer wall in summer is about 30% of the total heat absorption of the building. Therefore, the heat insulation design of the outer wall is quite important. The main function of the external heat insulation of the building external wall is to reduce the temperature difference of the structure and improve the thermal environment, thereby reducing the heat loss through the building external wall.
Although the traditional heat insulation board adopted in the field of buildings is light in weight and good in heat insulation, the biggest defect is that the fireproof safety performance is poor, and the flame retardant grade of the traditional heat insulation board even can not reach B1 grade. The traditional heat insulation board has extremely high fire spreading speed and hidden combustion, and once a fire disaster happens, the fire disaster is difficult to control. A large amount of smoke dust and toxic gases such as CO, HCN and the like can be generated when the traditional heat-insulating board is burnt in case of fire, and 80 percent of death accidents in case of fire are caused by the smoke dust and the toxic gases.
Montmorillonite, also known as montmorillonite and microcrystalline kaolinite, is a natural mineral of silicate and is the main mineral component of bentonite ore. Wherein Al is 2 O 3 About 16.54% of MgO, about 4.65% of SiO 2 The content is about 50.95%.The structural formula is (Al, Mg)2 [ SiO ] 10 〕(OH) 2 ·nH 2 O, belonging to monoclinic system, multi-site microcrystal, and aggregate in the form of soil, spherulite, etc. White, slightly grayish, yellowish, greenish, bluish when containing impurities, earthy luster or dull luster, and slippery feel. After adding water, it can expand several times its volume and become a paste. The volume of the product shrinks after heated dehydration. Has strong adsorption capacity and cation exchange performance, and is mainly produced in the weathering crust of volcanic tuff. Montmorillonite (including calcium-based, sodium-calcium-based, magnesium-based montmorillonite) is peeled, dispersed, purified, modified, ultra-fine graded, and special organically compounded, with average wafer thickness less than 25nm, and can be used as bleaching agent and adsorbent filler, and is called "universal material". Compared with calcium-based montmorillonite, the sodium-based montmorillonite has obviously better process performance than the calcium-based montmorillonite, the sodium-based soil has larger water absorption and expansion times, higher cation exchange capacity and better water dispersibility, and the colloidal suspension of the sodium-based montmorillonite has better thixotropy, viscosity, lubricity, thermal stability and the like.
The graphene is sp 2 The hybridized and connected carbon atoms are tightly packed into a new material with a single-layer two-dimensional honeycomb lattice structure. The graphene has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a revolutionary material in the future. The application of graphene to the flame-retardant insulation board is rare, and the reasons are that 1) the flame-retardant property of graphene cannot reach A level, and 2) graphene does not have price advantage. In the Chinese patent 'graphene EPS fireproof insulation board and the preparation method thereof (No. CN 107344844B)', low-amount graphene is doped in the flame-retardant insulation board, so that the mechanism of a compact carbon layer and radiation reflection is realized. The compactness of EPS is improved by a covalent bond formed between graphene and a polymer, so that the mechanical strength of the flame-retardant insulation board after the graphene is doped is improved by 160-200%; and the carbide forms a compact carbon layer under the action of the decomposition gas of the expanding agent, so that the conduction between the polymer and a heat source is prevented, and the purpose of flame retardance is achieved. However, the flame retardant grade of the existing graphene EPS can only reach B grade, but not A grade, and still notCan be used.
Metal Organic Frameworks (MOFs) are an ordered crystalline framework created by the self-assembly of metal ions and organic ligands. The catalyst has the characteristics of large specific surface area, regular pore structure, adjustable surface chemical property and the like, and is widely applied to the fields of gas storage, catalysis, separation, drug delivery and the like. In recent years, MOF materials have been widely used as novel flame retardants for various polymers (MOF/polymers) due to their high thermal stability. MOFs are rich in transition metal species, flame retardant elements and potential carbon sources, and the structure and properties are easily adjustable.
The invention provides a light heat-insulating plate which is prepared by taking sodium-based montmorillonite as a main aggregate, taking a plurality of modification auxiliary agents, an organic silicon flame retardant and a nitrogen-phosphorus flame retardant compound material as a cementing material and adopting the processes of stirring, compression molding, curing, cutting and the like and has excellent weather resistance, heat insulation and A-level fireproof performance.
Disclosure of Invention
The invention aims to provide a composite flame-retardant insulation board.
The invention provides the following technical scheme:
the composite flame-retardant insulation board comprises the following components in percentage by mass: 60-80 parts of sodium-based montmorillonite, 1-5 parts of ZIF-67/graphene-based composite filler, 5-10 parts of organic silicon flame retardant, 5-10 parts of nitrogen-phosphorus flame retardant and 5-15 parts of binder.
Preferably, the sodium-based montmorillonite is prepared by the following method: putting montmorillonite into an ethanol solution of sodium polyphosphate, ultrasonically shaking for 60min, and aging at 85 ℃ for 3h, wherein the mass ratio of the sodium polyphosphate to the montmorillonite is 0.05: 1.
Preferably, the graphene base is prepared by modifying graphite on the basis of graphene oxide prepared by a hummers method.
Preferably, the graphene-based is one or more of:
graphene oxide, reduced graphene oxide, graphene, nitrogen-doped graphene oxide, phosphorus-doped graphene, and phosphorus-doped graphene oxide.
Preferably, the organic silicon flame retardant is one or the combination of linear polysiloxane and cage type polysilsesquioxane.
Preferably, the nitrogen-phosphorus flame retardant is one of melamine phosphate and melamine polyphosphate or a combination thereof.
Preferably, the binder is calcium hydroxide.
A preparation method of a composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler:
dissolving dimethyl imidazole in an aqueous solution of graphene, and performing ultrasonic dispersion for 30-60 min to obtain an ultrasonic dispersion liquid, wherein the concentration of the aqueous solution of graphene is 1 mg/ml;
adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 4-12 h;
centrifuging, washing, drying the prepared MOF/GNs by using a freeze dryer, and performing ball milling after drying to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board:
weighing 60-80 parts of sodium-based montmorillonite, 1-5 parts of ZIF-67/graphene-based composite filler, 5-10 parts of organic silicon flame retardant, 5-10 parts of nitrogen-phosphorus flame retardant and 5-15 parts of binder in a metered manner;
stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be subjected to compression molding, and waiting for curing;
naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Preferably, the mass ratio of the cobalt salt to the graphene is 10: 1-30: 1; the molar ratio of the cobalt salt to the dimethyl imidazole is 1: 15-1: 30.
The invention finally provides the application of the composite flame-retardant heat-insulation board in the heat-insulation material of the building external wall.
The invention has the beneficial effects that:
the composite flame-retardant insulation board provided by the invention has low heat conductivity coefficient, can prevent the effect of heat bridge to the maximum extent, and can greatly reduce the thickness of the peripheral structure of the building under the condition of meeting the same insulation requirement, thereby effectively increasing the indoor use area of the building; the composite flame-retardant heat-insulation board has light volume weight, can reduce building load, has the density of less than or equal to 70kg/m, is lower than most inorganic heat-insulation boards on the market, and is only 1/4-1/3 of inorganic foaming boards; the composite flame-retardant insulation board provided by the invention has low water absorption rate and strong impermeability, and when the composite flame-retardant insulation board is applied to building engineering, the problems of wall surface wetting, mildewing, falling off and the like can be effectively avoided, and the service life of a building can be prolonged; the montmorillonite in the raw material is abundant in Chinese reserves and low in price;
the composite flame-retardant insulation board provided by the invention has good flame-retardant performance, can effectively prevent air from entering and prevent fire from spreading, and has good fireproof safety performance; the ZIF-67/graphene-based composite filler has an open framework structure, a large specific surface area and a regular pore structure, is balanced in overall strength, stable in pore structure, good in freeze-thaw resistance, high temperature resistance, tensile strength and seismic resistance, and can effectively avoid structural damage of the insulation board in the processes of transportation, construction and use.
Detailed Description
Example 1:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 60 parts of sodium-based montmorillonite, 5 parts of ZIF-67/graphene oxide composite filler, 10 parts of linear polysiloxane, 10 parts of melamine phosphate and 15 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 60min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 4 h; 3) centrifuging, washing, drying the prepared ZIF-67/graphene oxide by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 60 parts of sodium-based montmorillonite, 5 parts of ZIF-67/graphene oxide composite filler, 10 parts of linear polysiloxane, 10 parts of melamine phosphate and 15 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 2:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 80 parts of sodium-based montmorillonite, 5 parts of ZIF-67/reduced graphene oxide composite filler, 5 parts of linear polysiloxane, 5 parts of melamine phosphate and 5 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 45min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 6 h; 3) centrifuging, washing, drying the prepared ZIF-67/reduced graphene oxide by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 80 parts of sodium-based montmorillonite, 5 parts of ZIF-67/reduced graphene oxide composite filler, 5 parts of linear polysiloxane, 5 parts of melamine phosphate and 5 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 3:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 70 parts of sodium-based montmorillonite, 5 parts of ZIF-67/nitrogen-doped graphene composite filler, 5 parts of cage-type polysilsesquioxane, 10 parts of melamine polyphosphate and 15 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 60min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 8 h; 3) centrifuging, washing, drying the prepared ZIF-67/nitrogen-doped graphene by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 70 parts of sodium-based montmorillonite, 5 parts of ZIF-67/nitrogen-doped graphene composite filler, 5 parts of cage-type polysilsesquioxane, 10 parts of melamine polyphosphate and 15 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 4:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 65 parts of sodium-based montmorillonite, 1 part of ZIF-67/phosphorus-doped graphene composite filler, 10 parts of cage-type polysilsesquioxane, 10 parts of melamine polyphosphate and 14 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 45min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 12 h; 3) centrifuging, washing, drying the prepared ZIF-67/phosphorus-doped graphene by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 65 parts of sodium-based montmorillonite, 1 part of ZIF-67/phosphorus-doped graphene composite filler, 10 parts of cage-type polysilsesquioxane, 10 parts of melamine polyphosphate and 14 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 5:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 75 parts of sodium-based montmorillonite, 5 parts of ZIF-67/nitrogen-doped graphene composite filler, 5 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 10 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 60min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 12 h; 3) centrifuging, washing, drying the prepared ZIF-67/nitrogen-doped graphene by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 75 parts of sodium-based montmorillonite, 5 parts of ZIF-67/nitrogen-doped graphene composite filler, 5 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 10 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 6:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 80 parts of sodium-based montmorillonite, 3 parts of ZIF-67/phosphorus-doped graphene oxide composite filler, 7 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 5 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 30min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 10 h; 3) centrifuging, washing, drying the prepared ZIF-67/phosphorus-doped graphene oxide by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 80 parts of sodium-based montmorillonite, 3 parts of ZIF-67/phosphorus-doped graphene oxide composite filler, 7 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 5 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
Example 7:
the invention provides a composite flame-retardant insulation board which comprises the following components in percentage by mass: 70 parts of sodium-based montmorillonite, 5 parts of ZIF-67/reduced graphene oxide composite filler, 10 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 10 parts of calcium hydroxide.
The preparation method of the composite flame-retardant insulation board comprises the following steps:
step one, preparing a composite filler: 1) dissolving dimethyl imidazole in graphene-based aqueous solution, and performing ultrasonic dispersion for 30min to obtain ultrasonic dispersion liquid, wherein the concentration of the graphene-based aqueous solution is 1 mg/ml; 2) adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 12 h; 3) centrifuging, washing, drying the prepared ZIF-67/reduced graphene oxide by using a freeze dryer, drying, and then performing ball milling to obtain a powdery composite material;
step two, preparing the composite flame-retardant insulation board: weighing 70 parts of sodium-based montmorillonite, 5 parts of ZIF-67/reduced graphene oxide composite filler, 10 parts of cage-type polysilsesquioxane, 5 parts of melamine polyphosphate and 10 parts of calcium hydroxide by using an electronic weighing scale, stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be molded, and waiting for curing; naturally curing at normal temperature of about 25 ℃ and air relative humidity of 30-50% for about 8 hours, demolding, continuously curing for about 10 days after demolding to obtain a finished product, and performing subsequent cutting, covering and packaging.
[ TABLE 1 ]
Table 1 lists the performance parameters between the present invention and commercially available insulation board products.
[ TABLE 2 ]
Table 2 lists the life cycle costs between the present invention and the common commercial insulation board products
According to the DGJ32J71-2014 published by houses in Jiangsu province and urban and rural construction halls, the heat transfer coefficient K of the outer wall of 6 or more layers of buildings specified in the design Standard of thermal environment and energy conservation of the residential buildings in Jiangsu province is less than or equal to 1.0w/m 2 K, calculating the thickness of the required heat-insulating plate; according to the fact that the conversion coefficient of electricity and primary energy is 3.0, and the electricity charge is 0.76 yuan/kW.h; and calculating the life cycle cost of the heat insulation material by setting the service life of the heat insulation material to be 20 years. The life cycle cost is the sum of the investment cost of the heat-insulating material and the current value of the energy consumption expense of the heating and air conditioning during the use period of the building. And considering the time value of the capital, converting the cost in the life cycle into a present value by adopting a present value coefficient PWF for comparison. The main influencing factors of the PWF comprise loan interest rate, currency expansion rate, service life of heat-insulating materials and the like; the life cycle cost C is Cm + Ce is delta Mi multiplied by Mi + PWF (delta Ei multiplied by Ei), wherein C represents the life cycle cost and the unit is Yuan/m 2 (ii) a Cm represents the production phase cost in units of units/m 2 (ii) a Ce represents the cost of the use stage in units of yuan/m 2 (ii) a Mi represents the consumption of the ith material in m 3 (ii) a δ mi represents the unit price of the i-th wall material in units of units/m 3 (ii) a Ei represents the consumption of the i-th energy source in kg/m 2 (ii) a δ ei denotes the unit price of the ith energy source in units of units/kg.
The current value coefficient PWF is 1- (1+ I) -N/I, I is I-g/1+ g, wherein I represents the loan rate, and is 7.0 percent; g represents the inflation rate of the currency, and 2.0 percent is taken; i represents the discount rate; n represents the service life of the heat-insulating material, and is taken for 20 years.
As shown in table 2, it can be seen that the life cycle cost of the composite flame-retardant insulation board provided by the present invention is the lowest.
Although the present invention has been described in detail with reference to the foregoing embodiment 1, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made therein without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The composite flame-retardant insulation board is characterized by comprising the following components in percentage by mass: 60-80 parts of sodium-based montmorillonite, 1-5 parts of ZIF-67/graphene-based composite filler, 5-10 parts of organic silicon flame retardant, 5-10 parts of nitrogen-phosphorus flame retardant and 5-15 parts of binder;
the graphene group is one or more of the following: graphene oxide, reduced graphene oxide, graphene, nitrogen-doped graphene oxide, phosphorus-doped graphene, and phosphorus-doped graphene oxide;
the sodium-based montmorillonite is prepared by the following method: putting montmorillonite into an ethanol solution of sodium polyphosphate, ultrasonically shaking for 60min, and aging at 85 ℃ for 3h, wherein the mass ratio of the sodium polyphosphate to the montmorillonite is 0.05: 1;
the ZIF-67/graphene-based composite filler is prepared by the following method: dissolving dimethyl imidazole in an aqueous solution of graphene, and performing ultrasonic dispersion for 30-60 min to obtain an ultrasonic dispersion liquid, wherein the concentration of the aqueous solution of graphene is 1 mg/ml; adding cobalt salt into the ultrasonic dispersion liquid, stirring for 30min, and standing for 4-12 h; centrifuging, washing, drying by using a freeze dryer, and performing ball milling after drying to obtain a powdery ZIF-67/graphene-based composite filler;
the binder is calcium hydroxide.
2. The composite flame-retardant insulation board according to claim 1, wherein the graphene group is prepared by modifying graphite on the basis of graphene oxide prepared by a hummers method.
3. The composite flame-retardant insulation board according to claim 1, wherein the organic silicon flame retardant is one or a combination of linear polysiloxane and cage type polysilsesquioxane.
4. The composite flame-retardant insulation board according to claim 1, wherein the nitrogen-phosphorus flame retardant is one or a combination of melamine phosphate and melamine polyphosphate.
5. The composite flame-retardant insulation board according to claim 1, wherein the mass ratio of the cobalt salt to the graphene is 10: 1-30: 1; the molar ratio of the cobalt salt to the dimethyl imidazole is 1: 15-1: 30.
6. The preparation method of the composite flame-retardant insulation board according to claim 1, characterized by comprising the following steps:
weighing 60-80 parts of sodium-based montmorillonite, 1-5 parts of ZIF-67/graphene-based composite filler, 5-10 parts of organic silicon flame retardant, 5-10 parts of nitrogen-phosphorus flame retardant and 5-15 parts of binder in a metered manner;
stirring and homogenizing the materials to obtain a mixture, then putting the mixture into a mold to be subjected to compression molding, and waiting for curing; naturally curing at 25 deg.C and air relative humidity of 30-50% for 8 hr, demolding, maintaining for 10 days to obtain the final product, and performing subsequent cutting, covering and packaging.
7. The use of the composite flame retardant and thermal insulation panel of claim 1 in building exterior wall thermal insulation.
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| CN202111383607.9A CN114085061B (en) | 2021-11-22 | 2021-11-22 | Composite flame-retardant insulation board and preparation method and application thereof |
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