CN114591062A - Heat insulation material with fire resistance and preparation method thereof - Google Patents

Heat insulation material with fire resistance and preparation method thereof Download PDF

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Publication number
CN114591062A
CN114591062A CN202011395494.XA CN202011395494A CN114591062A CN 114591062 A CN114591062 A CN 114591062A CN 202011395494 A CN202011395494 A CN 202011395494A CN 114591062 A CN114591062 A CN 114591062A
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sio
pva
fiber
insulation material
adhesive
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Inventor
王晓帅
蔡玥
马富
刘惠
张小帅
张涛
郭志富
张广亮
张永利
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HENAN DACHENG CONSTRUCTION ENGINEERING CO LTD
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HENAN DACHENG CONSTRUCTION ENGINEERING CO LTD
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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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Building Environments (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a heat insulation material with fire resistance, which comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant moisture by suction filtration to prepare a fiberboard; (2) fiber body glue: at a certain temperature, PVA-SiO is mixed2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board after soaking for a certain time, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and drying the fiberboard subjected to glue removal under a natural ventilation condition to obtain the heat-insulating material. The invention also comprises the heat-insulating material prepared by the method. The heat insulation material prepared by the invention has good resistanceFire performance and heat preservation performance.

Description

Heat insulation material with fire resistance and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a heat-insulating material with fire resistance and a preparation method thereof.
Background
With the implementation of the building energy-saving standard new administration, building heat-insulating materials and heat-insulating technology are rapidly developed. The organic heat-insulating material has the advantages of good heat-insulating property, low manufacturing cost, light weight, convenient construction and the like, and is the most widely used heat-insulating material at present. However, the benzene board, the polyurethane board and the rubber powder particles are used as main raw materials of the organic heat-insulating material, so that the organic heat-insulating material has inflammability, once a fire occurs, the organic heat-insulating material can help the fire to spread, and a large amount of toxic smoke and molten drops can be generated in the combustion process. Because the inflammable property of the organic material is a short plate which cannot be overcome, and the superior performance of the organic material cannot make up the potential safety hazard of the organic material in other aspects. Therefore, the fire resistance of the thermal insulation material gradually becomes an important index of the quality of the thermal insulation material, and therefore, the development of the thermal insulation material with good fire resistance is of great significance.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a thermal insulation material with fire resistance and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant moisture by suction filtration to prepare a fiberboard; (2) fiber cement: at a certain temperature, PVA-SiO is mixed2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: will be soaked in oneTaking out the fiber board after the time is up, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Further, the using amount ratio of the fly ash/coal gangue fiber to water in the step (1) is (1-1.5) g:200 mL.
Further, the temperature of the jin jiao in the step (2) is 15-35 ℃; the PVA-SiO2PVA-SiO in binder diluent2The volume fraction of the adhesive is 25-40%.
Further, the soaking time of the fiberboard in the step (3) is 15-20 min.
Further, PVA-SiO2The preparation method of the adhesive comprises the following steps:
Figure 202477DEST_PATH_IMAGE001
dissolving PVA in water to prepare PVA solution with the volume fraction of 12%;
Figure 252473DEST_PATH_IMAGE002
mixing Na2SiO3Dissolving in water, and adding citric acid to dissolve Na2SiO3Adjusting the pH value of the solution to 11;
Figure 587639DEST_PATH_IMAGE003
na at pH 112SiO3Dropwise adding the solution into the PVA solution at 60 ℃, stirring while dropwise adding, and continuously stirring for 40-50 min after dropwise adding until the pH value of the final mixed solution is 7-9 to obtain the PVA-SiO2And (3) an adhesive.
Further, step (ii)
Figure 847719DEST_PATH_IMAGE001
And the steps of
Figure 926534DEST_PATH_IMAGE002
PVA and Na in2SiO3The weight ratio of (4-5) to (1); said step (c) is
Figure 80304DEST_PATH_IMAGE003
In Na2SiO3The volume ratio of the solution to the PVA solution was 1: 1.
The thermal insulation material prepared by the preparation method of the thermal insulation material with fire resistance can endure the high temperature of 300-400 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. whether the fly ash/coal gangue fiber is dispersed uniformly determines the internal structure of the fiberboard; if the fly ash/coal gangue fibers cannot be uniformly dispersed, the fibers are not easy to bond and form, and the performance of the prepared fiberboard is also reduced; if the fly ash/coal gangue fiber is directly placed in the PVA-SiO2 adhesive diluent for dispersion, a large amount of bubbles are generated under rapid stirring, which is not beneficial to the dispersion of the fly ash/coal gangue fiber, therefore, the fly ash/coal gangue fiber is placed in water for dispersion, and is treated by gum dipping after being dispersed uniformly, which is convenient for the subsequent uniform permeation of the PVA-SiO2 adhesive diluent in the fly ash/coal gangue fiber.
2. The volume fraction of the adhesive is 25-40%, so that the problem that the adhesive is difficult to permeate into the fiber board due to high concentration and high viscosity of the adhesive is avoided, and the problem that the adhesive is low in content and can fully contact with the fibers but the viscosity is insufficient to bond and form the fiber board due to low concentration is also avoided.
3. The PVA-SiO2 adhesive film coated on the surface of the fly ash/coal gangue fiber can enhance the acting force between the fiber and the fiber, meanwhile, a large number of pores can exist in the fiber board, and the adhesive film between the fibers can bond the fibers together, but can reduce the number of the pores in the fiber board, so that the gum dipping time for holding the fiber board is needed to ensure that a large number of pores exist in the manufactured fiber board, therefore, the time for adopting the viscose is 15-20 min, and not only can the bonding between the fibers be ensured, but also a sufficient amount of pores in the fiber board can be kept.
4. The heat insulating material prepared by the invention is of a layered structure, the internal fibers are mutually interwoven, a large number of pores are arranged in the middle, and the heat insulating material is not scattered after being burnt at 400 ℃, and still has the heat insulating effect.
In conclusion, the fly ash/coal gangue fiber is used as a raw material, PVA-SiO2 is used as an adhesive to prepare the heat insulation material, and the prepared heat insulation material has good fire resistance and heat insulation performance. The fly ash/coal gangue fiber in the raw materials used by the invention is solid waste, and the used adhesive has low cost; the heat-insulating material of the invention does not generate toxic and harmful substances in the preparation and use processes, and is green and pollution-free.
Detailed Description
Example 1: PVA-SiO2Preparation of Adhesives
PVA-SiO2The preparation method of the adhesive comprises the following steps:
Figure 851951DEST_PATH_IMAGE001
dissolving PVA in water to prepare PVA solution with the volume fraction of 12%;
Figure 333747DEST_PATH_IMAGE002
mixing Na2SiO3Dissolving in water, and adding citric acid to dissolve Na2SiO3Adjusting the pH value of the solution to 11; PVA and Na2SiO3The weight ratio of (A) to (B) is 4: 1;
Figure 216253DEST_PATH_IMAGE003
na at pH 112SiO3The solution was added dropwise to the PVA solution at 60 ℃ over Na2SiO3The volume ratio of the solution to the PVA solution is 1:1, stirring is carried out while dripping, after dripping is finished, stirring is carried out continuously for 40min until the pH value of the final mixed solution is 7, and then the PVA-SiO is obtained2And (3) an adhesive.
Example 2: PVA-SiO2Preparation of Adhesives
PVA-SiO2The preparation method of the adhesive comprises the following steps:
Figure 568737DEST_PATH_IMAGE001
will turn overPVA is dissolved in water to prepare PVA solution with the volume fraction of 12 percent;
Figure 917810DEST_PATH_IMAGE002
mixing Na2SiO3Dissolving in water, and adding citric acid to dissolve Na2SiO3Adjusting the pH value of the solution to 11; PVA and Na2SiO3In a weight ratio of 5: 1;
Figure 355744DEST_PATH_IMAGE003
na at pH 112SiO3The solution was added dropwise to the PVA solution at 60 ℃ over Na2SiO3The volume ratio of the solution to the PVA solution is 1:1, stirring is carried out while dripping, and after dripping is finished, stirring is carried out continuously for 50min until the pH value of the final mixed solution is 9, thus obtaining the PVA-SiO2And (3) an adhesive.
Example 3: PVA-SiO2Preparation of Adhesives
PVA-SiO2The preparation method of the adhesive comprises the following steps:
Figure 963312DEST_PATH_IMAGE001
dissolving PVA in water to prepare PVA solution with the volume fraction of 12%;
Figure 435882DEST_PATH_IMAGE002
mixing Na2SiO3Dissolving in water, adding citric acid to dissolve Na2SiO3Adjusting the pH value of the solution to 11; PVA and Na2SiO3In a weight ratio of 4.5: 1;
Figure 80490DEST_PATH_IMAGE003
na at pH 112SiO3The solution was added dropwise to the PVA solution at 60 ℃ over Na2SiO3The volume ratio of the solution to the PVA solution is 1:1, stirring is carried out while dripping, after dripping is finished, stirring is carried out continuously for 45min until the pH value of the final mixed solution is 8, and then the PVA-SiO is obtained2And (3) an adhesive.
Example 4: preparation of insulation material with fire resistance
Heat insulation material with fire resistanceThe preparation method of the material comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber body glue: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 25 percent, and then the PVA-SiO is mixed at the temperature of 15 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board soaked for 15min, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 1.
Example 5: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.5g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 40 percent, and then the PVA-SiO is mixed at the temperature of 35 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board after soaking for 20min, and removing redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 1.
Example 6: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.1g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 30 percent, and then the PVA-SiO is mixed at the temperature of 20 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board soaked for 16min, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 1.
Example 7: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.2g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2The adhesive is diluted by adding water to PVA-SiO2The volume fraction of the adhesive is 28 percent, and then the PVA-SiO is mixed at the temperature of 17 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board soaked for 17min, and removing the redundant PVA-SiO by suction filtration2An adhesive diluent; (4) and (3) drying the fiber: and drying the fiberboard subjected to glue removal under a natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 2.
Example 8: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.3g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 35 percent, and then the PVA-SiO is mixed at the temperature of 25 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board after soaking for 18min, and removing redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 2.
Example 9: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.4g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 38 percent, and then the PVA-SiO is mixed at the temperature of 27 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board soaked for 19min, and removing the redundant PVA-SiO by suction filtration2Adhesive plasterReleasing the liquid; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 2.
Example 10: preparation of insulating materials with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber body glue: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 32 percent, and then the PVA-SiO is mixed at the temperature of 33 ℃ of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In the diluent of the adhesive; (3) removing glue from the fiberboard: taking out the fiber board after soaking for 20min, and removing redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 3.
Example 11: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1.5g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 40 percent, and then the PVA-SiO is mixed at the temperature of 22 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2Adhesive agentIn a diluent; (3) removing glue from the fiberboard: taking out the fiber board soaked for 15min, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 3.
Example 12: preparation of insulation material with fire resistance
A preparation method of a thermal insulation material with fire resistance comprises the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, wherein the using amount ratio of the fly ash/coal gangue fiber to the water is 1g:200mL, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant water by suction filtration to prepare a fiberboard; (2) fiber cement: mixing PVA-SiO2Diluting the adhesive to PVA-SiO by adding water2The volume fraction of the adhesive is 22 percent, and then the PVA-SiO is mixed at the temperature of 18 ℃ under the temperature of the polyurethane adhesive2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiberboard soaked for 20min, and removing the redundant PVA-SiO by suction filtration2A binder diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
Wherein, PVA-SiO2The adhesive was prepared as described in example 3.
And (3) performance testing:
the insulation materials with fire resistance prepared in examples 4 to 12 are subjected to a combustion performance test and a thermal conductivity test, and the specific test methods are as follows:
(1) combustion Performance test of insulation Material
According to GB/T14402-2007 'determination of combustion performance and combustion value of building materials and products', an automatic calorimeter is used for detecting the combustion value of the manufactured products. Weighing 1g of heat insulating material, placing in a mortar, grinding until the size of fragments is not more than 0.2mm, placing the sample in an oxygen bomb for combustionThe burning temperature was 1200 ℃ for the burning test. Recording a total combustion value (PCS) and a weight loss rate (Delta m), wherein the calculation formula of the weight loss rate (Delta m) is as follows:
Figure 5720DEST_PATH_IMAGE004
in the formula: m1 is the mass of the material before combustion; m2 is the mass of the burned material. For sample fragments with excessively low combustion values, a certain amount of benzoic acid is added in proportion as a combustion improver, and then the test can be carried out, wherein the weight ratio of the sample to the benzoic acid is 1:1, and the combustion value caused by the benzoic acid is subtracted from the final test result.
(2) Thermal conductivity test of thermal insulation material
According to the national standard GB/T10294-2008 'determination of steady-state thermal resistance and related characteristics of heat-insulating materials', the product is made into a sample with the diameter of 800mm and the height of 80mm, and the heat conductivity coefficient of the product is determined by using a flat-plate heat conduction instrument.
The combustion performance and thermal conductivity of examples 4 to 12 were tested by the above performance test method, and the test results are shown in the following table:
Figure 230028DEST_PATH_IMAGE005
from the test results it can be seen that: the heat-insulating material with fire resistance prepared by the invention has a total combustion value less than 3MJ/Kg and a weight loss rate less than 20%, meets the A-grade standard in GB8624-2012 'fire performance grading of building materials and products', has a heat conductivity coefficient between 0.027-0.03 (W/m) DEG C, and has good heat-insulating property.

Claims (7)

1. A preparation method of a heat insulation material with fire resistance is characterized by comprising the following steps: (1) fiber dispersion: placing the fly ash/coal gangue fiber in water for dispersion, placing the fly ash/coal gangue fiber after uniform dispersion in a mould, and removing redundant moisture by suction filtration to prepare a fiberboard; (2) fiber cement: at a certain temperature, PVA-SiO is mixed2Pouring the diluent into the mould to make the fiber board be completely soaked in PVA-SiO2In a binder diluent; (3) removing glue from the fiberboard: taking out the fiber board after soaking for a certain time, and removing the redundant PVA-SiO by suction filtration2An adhesive diluent; (4) and (3) drying the fiber: and (3) drying the fiberboard after the glue is removed under the natural ventilation condition to obtain the heat-insulating material.
2. The preparation method of the heat insulation material with fire resistance according to claim 1, wherein the using amount ratio of the fly ash/coal gangue fiber to water in the step (1) is (1-1.5) g:200 mL.
3. The preparation method of the thermal insulation material with fire resistance according to claim 2, wherein the temperature of the fire-resistant adhesive in the step (2) is 15-35 ℃; the PVA-SiO2PVA-SiO in binder diluent2The volume fraction of the adhesive is 25-40%.
4. The preparation method of the thermal insulation material with fire resistance according to the claim 3, wherein the soaking time of the fiber board in the step (3) is 15-20 min.
5. A method for the production of a thermal insulation material with fire resistant properties according to claim 4, characterized in that the PVA-SiO2The preparation method of the adhesive comprises the following steps:
Figure DEST_PATH_IMAGE001
dissolving PVA in water to prepare PVA solution with the volume fraction of 12%;
Figure 710397DEST_PATH_IMAGE002
mixing Na2SiO3Dissolving in water, adding citric acid to dissolve Na2SiO3Adjusting the pH value of the solution to 11;
Figure DEST_PATH_IMAGE003
na at pH 112SiO3Dissolving the solution at 60 deg.CDropwise adding the mixture into a PVA solution while stirring, and continuously stirring for 40-50 min after the dropwise adding is finished until the pH value of the final mixed solution is 7-9 to obtain the PVA-SiO2And (3) an adhesive.
6. A method of producing insulation having fire resistance according to claim 5, characterised in that the steps are carried out in the same way
Figure 9660DEST_PATH_IMAGE001
And the step of
Figure 344826DEST_PATH_IMAGE002
PVA and Na in2SiO3The weight ratio of (4-5) to (1); said step (c) is
Figure 73748DEST_PATH_IMAGE003
In Na2SiO3The volume ratio of the solution to the PVA solution was 1: 1.
7. The heat insulation material prepared by the preparation method of the heat insulation material with the fire resistance as claimed in any one of claims 1 to 6, wherein the prepared heat insulation material can resist a high temperature of 300 ℃ to 400 ℃.
CN202011395494.XA 2020-12-03 2020-12-03 Heat insulation material with fire resistance and preparation method thereof Pending CN114591062A (en)

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