CN111807857A - Novel porous composite silicate heat-insulating material and preparation method thereof - Google Patents
Novel porous composite silicate heat-insulating material and preparation method thereof Download PDFInfo
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- CN111807857A CN111807857A CN202010638652.3A CN202010638652A CN111807857A CN 111807857 A CN111807857 A CN 111807857A CN 202010638652 A CN202010638652 A CN 202010638652A CN 111807857 A CN111807857 A CN 111807857A
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 239000011810 insulating material Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 78
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 239000004113 Sepiolite Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 24
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 24
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 24
- 210000002268 wool Anatomy 0.000 claims abstract description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 17
- 230000005855 radiation Effects 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- -1 penetrant Substances 0.000 claims abstract description 4
- 239000012774 insulation material Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 12
- 239000005543 nano-size silicon particle Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- YMCIVAPEOZDEGH-UHFFFAOYSA-N 5-chloro-2,3-dihydro-1h-indole Chemical compound ClC1=CC=C2NCCC2=C1 YMCIVAPEOZDEGH-UHFFFAOYSA-N 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 5
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 claims description 4
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 claims description 4
- 229920000609 methyl cellulose Polymers 0.000 claims description 4
- 239000001923 methylcellulose Substances 0.000 claims description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 3
- 239000011976 maleic acid Substances 0.000 claims description 3
- 229940074404 sodium succinate Drugs 0.000 claims description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 3
- LAZOHFXCELVBBV-UHFFFAOYSA-N [Mg].[Ca].[Si] Chemical group [Mg].[Ca].[Si] LAZOHFXCELVBBV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 241000282414 Homo sapiens Species 0.000 abstract description 18
- 238000004321 preservation Methods 0.000 abstract description 10
- 238000009413 insulation Methods 0.000 abstract description 9
- 230000006378 damage Effects 0.000 abstract description 6
- 239000010425 asbestos Substances 0.000 abstract description 5
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 5
- 210000001124 body fluid Anatomy 0.000 abstract description 4
- 239000010839 body fluid Substances 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 4
- 230000007123 defense Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract description 2
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000000711 cancerogenic effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000010981 methylcellulose Nutrition 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 239000000391 magnesium silicate Substances 0.000 description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 description 2
- 235000019792 magnesium silicate Nutrition 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- 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
- C04B28/26—Silicates of the alkali metals
-
- 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
- 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
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Landscapes
- 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)
- Thermal Insulation (AREA)
Abstract
The invention discloses a novel porous composite silicate heat-insulating material and a preparation method thereof, belonging to the technical field of inorganic heat-insulating materials. The material of the invention is mainly made of soluble fiber and vitrified micro bubbles, and is compounded by adding dispersant, binder, penetrant, sepiolite wool, calcium sulfate whisker, silicon dioxide and heat radiation resistant material, the soluble fiber replaces the traditional ceramic fiber, the soluble fiber has enough solubility in human body fluid, the retention time in the human body is shortened, and the damage of the traditional ceramic fiber to the human body is reduced to the minimum; and the product does not contain asbestos and does not pollute the environment. The heat insulating material prepared by the invention is suitable for thermal equipment in the departments of electric power, petroleum, chemical engineering, light industry, national defense industry, traffic, metallurgy and the like, heat preservation (temperature preservation) cold engineering of chimney inner walls and furnace kiln shells, heat preservation and insulation of pipelines and the like, and has the advantages of environmental friendliness, no toxicity, low heat conductivity coefficient, high temperature resistance, good thermal stability, good mechanical property, convenient construction and the like.
Description
Technical Field
The invention belongs to the field of composite silicate heat-insulating materials, and particularly relates to a novel porous composite silicate heat-insulating material and a preparation method thereof.
Background
With the rapid development of economy in China, various buildings achieve huge achievements, but huge energy consumption is generated, and in the energy consumption, the heat loss is the greater proportion. In order to solve the problem, thermal insulation materials are rapidly developed, and the demand of the thermal insulation materials in the industries such as electric power, petroleum, chemical industry, light industry, national defense industry, traffic, metallurgy and the like is increasing. Thermal insulation materials are generally divided into organic thermal insulation materials and inorganic thermal insulation materials, and organic thermal insulation materials such as polyurethane, polystyrene and the like are easy to burn although having low thermal conductivity coefficients, so that the application of the thermal insulation materials is limited, and the thermal insulation materials are still inorganic thermal insulation materials which are widely applied at present.
The inorganic heat-insulating materials are various, such as nano aerogel products, aluminum silicate products, magnesium silicate products, glass fiber needled felts, expanded perlite heat-insulating materials, composite silicate heat-insulating materials and the like. The composite silicate heat-insulating material has better performance and is deeply favored by people and widely applied to various industries at present according to comprehensive consideration of advantages and disadvantages, heat-insulating effect and various factors.
The ceramic fiber in the composite silicate heat-insulating material is one of the main components, for example, the invention patent CN104671706B prepares a flexible composite silicate heat-insulating material by utilizing inorganic fiber, sepiolite and the like, and has the advantages of light weight, good thermal stability, low heat conductivity coefficient and the like; the invention patent CN107879663A adopts volcanic fiber, sepiolite, surfactant and the like to synthesize a composite silicate insulation board, which is applicable to the fields of electric power, petroleum, chemical industry and the like, and has low cost and simple operation; the invention patent CN110510930A utilizes vitrified micro bubbles, aluminum silicate cotton and the like to prepare a heat insulation material, has excellent long-acting heat insulation performance, and simultaneously covers the heat insulation temperature range from low temperature to high temperature. However, the conventional ceramic fiber has a fatal defect in the process of manufacturing or applying as a raw material to other heat insulating materials: the ceramic fiber has small diameter, most of which is less than 6 μm, has brittle performance, is easy to break to generate fiber dust, and the dust is easy to be inhaled by human bodies to influence the health of the human bodies. And the brittleness of the material is short in service cycle, and the material is easy to crack and dissipate heat by convection.
In recent years, many scientific research institutes in the world have conducted a great deal of experimental research on the safety of ceramic fibers, including research on carcinogenesis of human bodies. Some current organizations and organizations classify ceramic fibers into class 2B (possibly carcinogenic substances), such as the International Center for Research on Cancer, which considers that the pH of normal human body fluids is 7.35-7.45, while Al is used2O3、SiO2The ceramic fiber as the main component is not easy to dissolve after being inhaled into human body, thus causing harm to human body. At present, the evidence of carcinogenic effect of ceramic fiber on human body is not sufficient, but some countries in Europe and America have listed ceramic fiber in products for controlling use and required that the product package is printed with marks harmful to the product. Meanwhile, asbestos is added into some composite silicate heat-insulating materials, for example, the components of the composite silicate heat-insulating materials described in patent patents CN100390090C and CN110498636A contain asbestos, and the asbestos is a carcinogen and can seriously harm the health of people after long-term contact.
With the continuous progress of society and the enhancement of environmental protection consciousness of human beings, higher requirements are put forward on the composite silicate heat-insulating material, and the composite silicate heat-insulating material not only meets the requirements of low heat conductivity coefficient, high temperature resistance, good thermal stability and the like, but also needs to be environment-friendly, nontoxic, good in mechanical property and convenient to construct. The existing composite silicate heat-insulating material can not meet the application requirements in many fields, and a novel composite silicate heat-insulating material is urgently needed to be developed.
Disclosure of Invention
The invention provides a novel porous composite silicate heat-insulating material and a preparation method thereof, aiming at the problems of high brittleness, easy breakage and harm to human health of a silicate heat-insulating material prepared from inorganic fibers (ceramic fibers) in the prior art.
The invention is realized by the following technical scheme:
a novel porous composite silicate heat-insulating material comprises, by weight, 3-30 parts of soluble fibers, 5-50 parts of vitrified micro bubbles, 0.1-2 parts of a dispersing agent, 1-20 parts of a binder, 0.1-10 parts of a penetrating agent, 5-35 parts of sepiolite wool, 0.1-4 parts of calcium sulfate whiskers, 0.05-3 parts of silicon dioxide, 0.3-5 parts of a heat radiation resistant material and 30-80 parts of water.
Further, the soluble fiber is calcium-magnesium-silicon soluble fiber.
Further, the density of the soluble fiber is 60-120 kg/m3The average diameter of the fiber is 1-5 μm, the length of the fiber is 10-150mm, the soluble fiber has enough solubility in human body fluid, the retention time in human body is shortened, and the damage of the traditional ceramic fiber to human body is reduced to the minimum.
Furthermore, the density of the vitrified micro bubbles is 50-130 kg/m3The grain size is 18-100 meshes.
Furthermore, the mesh number of the vitrified micro bubbles is 18-50 meshes, so that the skeleton is provided to reduce the density of the porous composite silicate heat-insulating material.
Further, the dispersant is more than one of methyl cellulose, polyacrylamide and polyvinyl alcohol; the binder is more than one of silica sol and water glass; the penetrating agent is more than one of maleic acid diisooctyl sulfonate and sulfonated dioctyl sodium succinate, and the compatibility of each component is enhanced; the penetrating agent is more than one of maleic acid diisooctyl sulfonate and sulfonated dioctyl sodium succinate; the silicon dioxide is nano silicon dioxide; the heat radiation resistant material is nano ceramic powder with radiation resistance, and the heat radiation resistance of the material is improved.
Furthermore, the specification of the sepiolite wool is 50-300 meshes.
Furthermore, the sepiolite wool has the specification of 100-200 meshes, and the sepiolite is a fibrous hydrous magnesium silicate light porous material and has the performances of heat preservation, heat insulation, good thermal stability and the like.
The calcium sulfate whisker is a fibrous (whisker-shaped) single crystal with complete appearance, uniform cross section and perfect internal structure, and can improve the performances of toughening, heat preservation, heat insulation and the like of the material.
According to the preparation method of the porous composite silicate heat-insulating material, the dispersing agent is dissolved by adding water, the soluble fiber is added, then the vitrified micro bubbles, the binder, the penetrating agent, the sepiolite wool, the calcium sulfate whisker, the silicon dioxide, the heat radiation material and the water are added, and the porous composite silicate heat-insulating material is uniformly stirred.
Furthermore, the concentration of the dispersant after water addition is 0.2-15 wt%.
Advantageous effects
1. The novel porous composite silicate heat-insulating material provided by the invention has the advantages that the soluble fiber is used for replacing the traditional ceramic fiber, the soluble fiber has enough solubility in the body fluid of the human body, the retention time in the human body is shortened, the damage of the traditional ceramic fiber to the human body is minimized, and the novel porous composite silicate heat-insulating material does not contain asbestos and does not pollute the environment;
2. according to the novel porous composite silicate heat-insulating material provided by the invention, calcium sulfate whiskers are added into the material, so that the performances of toughening, heat preservation, heat insulation and the like of the material can be improved, silicon dioxide is added to play a role in reducing the heat conductivity coefficient of the material, and a heat radiation resistant material is added to enhance the heat radiation resistance of the material;
3. the novel porous composite silicate heat-insulating material provided by the invention is suitable for thermal equipment, heat preservation (temperature preservation) cold engineering of inner walls of chimneys and shells of furnaces and kilns, heat preservation and insulation of pipelines and the like in the departments of electric power, petroleum, chemical industry, light industry, national defense industry, traffic, metallurgy and the like, and has the advantages of environmental friendliness, no toxicity, low heat conductivity coefficient, high temperature resistance, good thermal stability, good mechanical property, convenience in construction and the like.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following examples are set forth without any intention to limit the scope of the present invention, and all equivalent technical solutions are also within the scope of the present invention, and the scope of the present invention should be defined by the claims.
The parts described in the following examples are parts by weight.
The soluble fiber is HB environment-friendly fiber with different densities produced by Shandongthe optical fiber limited company, the main components of the fiber are calcium oxide, magnesium oxide and silicon oxide, and the content of aluminum oxide is less than 0.5 percent.
Example 1
Firstly, 0.2 part of polyacrylamide is added into 3.8 parts of water to prepare 5% polyacrylamide solution, 5 parts of soluble fiber are added to be uniformly dispersed, and then 30 parts of vitrified micro bubbles, 8 parts of silica sol, 2 parts of diisooctyl maleate sulfonate, 10 parts of sepiolite wool, 2 parts of calcium sulfate whisker, 1.8 parts of nano silicon dioxide, 2 parts of heat-reflecting nano ceramic powder and 36.2 parts of water are added into the solution to be uniformly mixed and stirred to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 50kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 80kg/m3The grain size is 18-50 meshes; the sepiolite wool is 200 meshes.
Example 2
Firstly, adding 0.5 part of polyacrylamide and 0.5 part of polyvinyl alcohol into 9 parts of water to prepare a 10% mixed solution, adding 12 parts of soluble fiber to disperse uniformly, and then adding 20 parts of vitrified micro bubbles, 7 parts of silica sol, 8 parts of water glass, 3 parts of diisooctyl maleate sulfonate, 2 parts of dioctyl sodium sulfosuccinate, 7 parts of sepiolite wool, 1.5 parts of calcium sulfate whisker, 2.5 parts of nano silicon dioxide, 1 part of heat-radiation-reflecting nano ceramic powder and 26 parts of water into the soluble fiber solution to mix and stir uniformly to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 70kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 70kg/m3The grain size is 30-50 meshes; the sepiolite wool is 200 meshes.
Example 3
Firstly, 0.5 part of polyvinyl alcohol is added into 24.5 parts of water to prepare a 2% mixed solution, and 10 parts of soluble fiber is added to be uniformly dispersed. Then adding 5 parts of vitrified micro bubbles, 5 parts of silica sol, 3 parts of diisooctyl maleate sulfonate, 12 parts of sepiolite wool, 1 part of calcium sulfate whisker, 0.5 part of nano silicon dioxide, 3 parts of heat-reflecting nano ceramic powder and 35.5 parts of water into the soluble fiber solution, and uniformly mixing and stirring to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 100kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 80kg/m3The grain size is 18-30 meshes; the sepiolite wool is 100 meshes.
Example 4
First, 0.1 part of polyacrylamide is added into 9.9 parts of water to prepare a 1% mixed solution, and 5 parts of soluble fiber is added to be uniformly dispersed. Then adding 10 parts of vitrified micro bubbles, 2 parts of water glass, 0.2 part of dioctyl sodium sulfosuccinate, 5 parts of sepiolite wool, 0.5 part of calcium sulfate whisker, 2 parts of nano silicon dioxide, 0.2 part of heat-reflecting nano ceramic powder and 65.1 parts of water into the soluble fiber solution, and uniformly mixing and stirring to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 80kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 100kg/m3The grain size is 18-30 meshes; the sepiolite wool is about 100 meshes and 200 meshes in a ratio of 1: 1.
Example 5
First, 1 part of methylcellulose is added into 7.3 parts of water to prepare a 12% mixed solution, and 15 parts of soluble fiber is added to be uniformly dispersed. Then adding 8 parts of vitrified micro bubbles, 2 parts of water glass, 1 part of diisooctyl maleate sulfonate, 6 parts of sepiolite wool, 0.8 part of calcium sulfate whisker, 0.1 part of nano silicon dioxide, 1.1 part of heat-reflecting nano ceramic powder and 57.7 parts of water into the soluble fiber solution, and uniformly mixing and stirring to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 80kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 100kg/m3Large particle diameterThe size is 30-50 meshes; the sepiolite wool is 100 meshes.
Example 6
Firstly, 0.5 part of polyvinyl alcohol and 1 part of methyl cellulose are added into 17.25 parts of water to prepare 8% mixed solution, and 8 parts of soluble fiber is added to be uniformly dispersed. Then adding 10 parts of vitrified micro bubbles, 3 parts of water glass, 0.5 part of dioctyl sodium sulfosuccinate, 20 parts of sepiolite wool, 0.3 part of calcium sulfate whisker, 0.9 part of nano silicon dioxide, 0.8 part of heat-reflecting nano ceramic powder and 37.75 parts of water into the soluble fiber solution, and uniformly mixing and stirring to prepare the novel porous composite silicate heat-insulating material.
Wherein the soluble fiber has a density of 110kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm; the density of the vitrified micro bubbles is 80kg/m3The grain size is 18-30 meshes; the sepiolite wool is 100 meshes.
Comparative example 1
Ceramic fibers were substituted for the soluble fibers and the remaining preparation and addition materials were the same as in example 1.
Comparative example 2
The same as example 1 except that calcium sulfate whisker, nano-silica and a heat-radiation-reflecting nano-ceramic powder material were not added.
Performance of
1. Performance comparison of products prepared from ceramic fiber and HB environment-friendly fiber serving as raw materials
TABLE 1 comparison of the properties of products made from ceramic fibers (comparative example 1) and soluble fibers (example 1) as raw materials
From table 1, it can be seen that the volume weight, the thermal conductivity coefficient at different temperatures, and the average heat dissipation loss of the novel porous composite silicate thermal insulation material prepared by respectively using the ceramic fiber and the HB environment-friendly fiber as raw materials are not greatly different, which indicates that the performance of the novel porous composite silicate thermal insulation material prepared by using the HB environment-friendly fiber instead of the ceramic fiber is not reduced.
2. Calcium sulfate crystal whisker, nano silicon dioxide and heat radiation resistant material are added
TABLE 2 addition of calcium sulfate whiskers, nano-silica, heat-reflecting nano-ceramic powder material and properties without addition
As can be seen from Table 2, the thermal conductivity and average heat dissipation of the novel porous composite silicate thermal insulation material prepared without adding the calcium sulfate whisker, the nano-silica and the anti-heat radiation nano-ceramic powder material are higher than those of the novel porous composite silicate thermal insulation material, which indicates that the novel porous composite silicate thermal insulation material added with the calcium sulfate whisker, the nano-silica and the anti-heat radiation nano-ceramic powder material plays a great role in thermal insulation and heat preservation of the material.
Claims (10)
1. The novel porous composite silicate heat-insulating material is characterized by comprising the following raw materials, by weight, 3-30 parts of soluble fibers, 5-50 parts of vitrified micro bubbles, 0.1-2 parts of dispersing agents, 1-20 parts of binding agents, 0.1-10 parts of penetrating agents, 5-35 parts of sepiolite wool, 0.1-4 parts of calcium sulfate whiskers, 0.05-3 parts of silicon dioxide, 0.3-5 parts of heat radiation resistant materials and 30-80 parts of water.
2. The porous composite silicate insulation material according to claim 1, wherein the soluble fiber is a calcium magnesium silicon type soluble fiber.
3. The porous composite silicate insulation material according to claim 1, wherein the soluble fiber has a density of 60-120 kg/m3The average diameter of the fiber is 1-5 μm, and the length of the fiber is 10-150 mm.
4. The porous composite silicate insulation material according to claim 1, wherein the density of the vitrified micro bubbles is 50 to 130 kg/m3The grain size is 18-100 meshes.
5. The porous composite silicate insulation material according to claim 4, wherein the mesh number of the vitrified micro bubbles is 18-50 mesh.
6. The porous composite silicate heat insulating material according to claim 1, wherein the dispersant is one or more of methylcellulose, polyacrylamide and polyvinyl alcohol; the binder is more than one of silica sol and water glass; the penetrating agent is more than one of diisooctyl maleate sulfonate and dioctyl sodium sulfosuccinate; the penetrating agent is more than one of maleic acid diisooctyl sulfonate and sulfonated dioctyl sodium succinate; the silicon dioxide is nano silicon dioxide; the heat radiation resistant material is nano ceramic powder with radiation resistant performance.
7. The porous composite silicate insulation material according to claim 1, wherein the sepiolite wool is 50-300 mesh in size.
8. The porous composite silicate insulation material according to claim 7, wherein the sepiolite wool is 100-200 mesh.
9. The preparation method of the porous composite silicate heat-insulating material as claimed in any one of claims 1 to 8, characterized in that a dispersing agent is added with water to dissolve, soluble fibers are added, then vitrified micro bubbles, a binder, a penetrating agent, sepiolite wool, calcium sulfate whiskers, silicon dioxide, a heat radiation material and water are added, and the mixture is uniformly stirred to obtain the porous composite silicate heat-insulating material.
10. The preparation method according to claim 9, wherein the concentration of the dispersant after adding water is 0.2-15 wt%.
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Application publication date: 20201023 |