CN118145915B - High heat insulation calcium silicate board - Google Patents
High heat insulation calcium silicate board Download PDFInfo
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- CN118145915B CN118145915B CN202410586729.5A CN202410586729A CN118145915B CN 118145915 B CN118145915 B CN 118145915B CN 202410586729 A CN202410586729 A CN 202410586729A CN 118145915 B CN118145915 B CN 118145915B
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- powder
- calcium silicate
- calcium
- silicate board
- polyethylene wax
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- 239000000378 calcium silicate Substances 0.000 title claims abstract description 65
- 229910052918 calcium silicate Inorganic materials 0.000 title claims abstract description 65
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000009413 insulation Methods 0.000 title claims abstract description 33
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims abstract description 56
- 239000004209 oxidized polyethylene wax Substances 0.000 claims abstract description 56
- 239000006185 dispersion Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000839 emulsion Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- 238000004537 pulping Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 123
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 59
- 239000002245 particle Substances 0.000 claims description 49
- 235000012239 silicon dioxide Nutrition 0.000 claims description 44
- 238000003756 stirring Methods 0.000 claims description 36
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 31
- 239000000920 calcium hydroxide Substances 0.000 claims description 31
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 31
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 31
- 239000002002 slurry Substances 0.000 claims description 31
- 239000010453 quartz Substances 0.000 claims description 29
- DWPDSISGRAWLLV-JHZYRPMRSA-L calcium;(1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical compound [Ca+2].C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C([O-])=O.C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C([O-])=O DWPDSISGRAWLLV-JHZYRPMRSA-L 0.000 claims description 27
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 claims description 23
- WPEXVRDUEAJUGY-UHFFFAOYSA-B hexacalcium;(2,3,4,5,6-pentaphosphonatooxycyclohexyl) phosphate Chemical compound [Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])(=O)OC1C(OP([O-])([O-])=O)C(OP([O-])([O-])=O)C(OP([O-])([O-])=O)C(OP([O-])([O-])=O)C1OP([O-])([O-])=O WPEXVRDUEAJUGY-UHFFFAOYSA-B 0.000 claims description 23
- 239000000429 sodium aluminium silicate Substances 0.000 claims description 23
- 235000012217 sodium aluminium silicate Nutrition 0.000 claims description 23
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 23
- 238000001723 curing Methods 0.000 claims description 22
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- OEUVSBXAMBLPES-UHFFFAOYSA-L calcium stearoyl-2-lactylate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC(=O)OC(C)C(=O)OC(C)C([O-])=O.CCCCCCCCCCCCCCCCCC(=O)OC(C)C(=O)OC(C)C([O-])=O OEUVSBXAMBLPES-UHFFFAOYSA-L 0.000 claims description 12
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims description 11
- 229910019142 PO4 Inorganic materials 0.000 claims description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 11
- 239000010452 phosphate Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 11
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 11
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- 238000000748 compression moulding Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000012043 crude product Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 238000006136 alcoholysis reaction Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 20
- 238000004321 preservation Methods 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- FDKAAIFOPLCYAM-UHFFFAOYSA-M C(C(O)C)(=O)[O-].C(CCCCCCCCCCCCCCCCC)(=O)[Ca+] Chemical compound C(C(O)C)(=O)[O-].C(CCCCCCCCCCCCCCCCC)(=O)[Ca+] FDKAAIFOPLCYAM-UHFFFAOYSA-M 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 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 3
- 239000004964 aerogel Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000010957 calcium stearoyl-2-lactylate Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 description 1
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 235000002949 phytic acid Nutrition 0.000 description 1
- 239000000467 phytic acid Substances 0.000 description 1
- 229940068041 phytic acid Drugs 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/22—Natural resins, e.g. rosin
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/383—Whiskers
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/08—Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
- C04B24/085—Higher fatty acids
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/243—Phosphorus-containing polymers
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2623—Polyvinylalcohols; Polyvinylacetates
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
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- 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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- 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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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A high heat insulation calcium silicate board belongs to the technical field of building materials, and is obtained through 6 steps of oxidized polyethylene wax emulsion preparation, aluminum borate whisker dispersion liquid preparation, pulping, pressing plate, autoclaved curing and drying shaping; the high-heat-insulation and heat-preservation calcium silicate board obtained by the invention has the apparent density of 148-157 kg/m 3, the compressive strength of 20.9-22.5 MPa, the flexural strength of 21.5-24.1 MPa, the heat conductivity coefficient of 45.6-51.3 mW/(m.k), the surface hydrophobicity of 98.7-99.6% and the water absorption of 0.63-0.85%.
Description
Technical Field
The invention relates to a high-heat-insulation calcium silicate board, and belongs to the technical field of building materials.
Background
The calcium silicate board has the advantages of high strength, low heat conductivity coefficient, high use temperature, good sound and heat insulation effect, safe use and the like, and is widely applied. Indoor is mainly used for partition walls, suspended ceilings, wet house partition walls, fire-proof walls of office buildings, indoor ground laying and the like, and outdoor is mainly used for exterior wall hanging plates or exterior wall veneers. In practical application, the calcium silicate board has the problems of high breakage rate, high brittleness, easy crack generation, high water absorption, reduced strength of the board after water absorption, rapid increase of the heat conductivity coefficient after water absorption and the like, so that the water absorption rate of the calcium silicate board is reduced on the premise of ensuring the mechanical property of the calcium silicate board, and the improvement of the heat insulation performance is very important for the application of the calcium silicate board in the field of building materials.
Chinese patent CN117682838A discloses a heat-insulating calcium silicate board and a preparation method thereof, which comprises the steps of firstly mixing diatomite with carbide slurry, adding water and stirring to form slurry, then adding cotton pulp composite fiber into the slurry, uniformly stirring, and finally carrying out shoveling forming, pre-curing treatment, autoclaved curing and drying to obtain the calcium silicate board. The calcium silicate board obtained by the patent has lower heat conductivity coefficient, but not good flexural strength, and higher density, and is not convenient for construction in building.
Chinese patent CN117585977a discloses a method for preparing a high-strength insulating calcium silicate material, comprising: deionized water, ceramic fiber and silicon dioxide powder are adopted to prepare pre-sizing agent; adding silicon dioxide aerogel and a foaming agent into the pre-slurry for dispersion treatment to prepare silicon dioxide aerogel slurry; adopting a calcareous raw material and the silicon dioxide aerogel slurry, adding reinforcing fibers, zeolite powder and a waterproof agent for hydrothermal reaction, and preparing microporous calcium silicate particles; preparing the microporous calcium silicate particles and aluminum silicate fibers into calcium silicate aluminum silicate slurry; and carrying out vacuum suction filtration on the calcium silicate aluminum silicate slurry to obtain the high-strength heat-insulating calcium silicate material. The high-strength heat-insulating calcium silicate material obtained by the patent has lower heat conductivity and better strength, but the surface hydrophobicity is not quite good, and the water absorption rate is higher.
The problems that the surface hydrophobicity is low, the overall water absorption is high, the heat conductivity coefficient is large, the mechanical property is to be improved and the like still exist in the calcium silicate board, so that the preparation of the calcium silicate board with low water absorption, high heat insulation and heat preservation and good mechanical property has very important practical significance.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a high heat insulation calcium silicate board, which realizes the following aims: the calcium silicate board with low water absorption, high heat insulation and heat preservation and good mechanical property is prepared.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
The high-heat-insulation calcium silicate board is obtained through 6 steps of oxidized polyethylene wax emulsion preparation, aluminum borate whisker dispersion liquid preparation, pulping, pressing plate, autoclaved curing and drying shaping;
the following is a further improvement of the above technical scheme:
Step 1, oxidized polyethylene wax emulsion preparation
Adding sodium oleate, isooctyl alcohol polyoxyethylene ether phosphate and deionized water into a high-speed dispersion kettle, controlling the dispersion rate to be 3000-5000 r/min, heating and keeping the temperature to be 85-98 ℃, dispersing for 20-40 min, then increasing the dispersion rate to 6500-9000 r/min, adding oxidized polyethylene wax, dispersing at high speed for 2-5 h, and cooling to room temperature to obtain oxidized polyethylene wax emulsion;
The mass ratio of the sodium oleate to the isooctyl alcohol polyoxyethylene ether phosphate to the water to the oxidized polyethylene wax is 1-3:2-5:70-100:15-40;
The softening point of the oxidized polyethylene wax is 100-115 ℃.
Step 2, preparation of aluminum borate whisker dispersion liquid
Putting aluminum borate whisker, polyvinyl alcohol and water into a high-speed stirrer according to the mass ratio of 30-60:1-3:110-150, heating to 60-80 ℃, keeping the constant temperature, stirring and dispersing for 5-8 hours at the rotating speed of 1500-3000 rpm, and cooling to room temperature to obtain aluminum borate whisker dispersion liquid;
The diameter of the aluminum borate whisker is 0.3-8 microns, and the length of the aluminum borate whisker is 30-3000 microns;
The molecular weight of the polyvinyl alcohol is 7000-20000 g/mol, and the alcoholysis degree is 70-90%.
Step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 80-100:60-115:25-55:2-7:3-9:1-2.5:2-4:30-60, controlling the stirring speed to be 90-130 r/min, stirring and dispersing for 3-7 hours at the dispersing speed of 2500-4500 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 70-150 minutes to obtain slurry;
The particle size of the quartz powder is 1-40 microns, and the silicon dioxide content is 92-98%;
The particle size of the slaked lime powder is 1-60 microns, and the content of calcium hydroxide is 84-95%;
The particle size of the sodium aluminosilicate powder is 1-30 microns;
The particle size of the calcium abietate powder is 0.1-3 microns;
the particle size of the calcium phytate powder is 1-30 microns;
the addition mass of the oxidized polyethylene wax emulsion is 3-13 wt% of the mass of the quartz powder.
Step 4, pressing plate
And (3) injecting the slurry into a template, and performing compression molding by using a cold press, wherein the compression molding pressure is 15-45 MPa, the dwell time is 15-30 minutes, and the pre-pressing plate is obtained after pressure relief and demoulding.
Step 5, autoclaved curing
And (3) pre-curing the pre-pressed plate for 12-18 hours at the temperature of 50-75 ℃ and the humidity of 90-98%, then placing the pre-pressed plate into an autoclave, introducing saturated steam for autoclaved curing, controlling the temperature in the autoclave to be 165-190 ℃ and the pressure to be 0.6-1.3 MPa, and preserving heat and pressure for 8-14 hours to obtain a crude product.
Step 6, drying and shaping
And drying the crude product at 70-95 ℃ until the moisture content is 0.5-1.5wt%, and polishing the surface to obtain the high-heat-insulation calcium silicate board finished product.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention utilizes two high temperature resistant and alkali resistant emulsifiers of sodium oleate and isooctyl alcohol polyoxyethylene ether phosphate, and relies on a high shear dispersion process to prepare oxidized polyethylene wax into emulsion, and then uniformly disperses the emulsion into calcium silicate board slurry, the oxidized polyethylene wax is dispersed in the slurry in the form of tiny emulsion droplets, after the slurry is pre-pressed and molded, the oxidized polyethylene wax tiny emulsion droplets slowly break emulsion after long-time high pressure and high temperature, the oxidized polyethylene wax is melted into tiny droplet states, and the oxidized polyethylene wax droplets migrate to the surface layer of the calcium silicate board due to low density and low surface tension, so that the surface layer of the calcium silicate board has very good hydrophobicity;
2. According to the invention, aluminum borate whisker is pre-dispersed under the dispersion action of polyvinyl alcohol, and is added into calcium silicate board slurry after being prepared into dispersion liquid, and then the slurry is further dispersed, so that after the aluminum borate whisker is dispersed for two times, the dispersion uniformity degree of the aluminum borate whisker in a finished product of the calcium silicate board can be ensured, the reinforcing and toughening effects of the aluminum borate whisker on the calcium silicate board can reach an optimal state, and further the finished product of the calcium silicate board with very good mechanical property can be obtained;
3. The stearoyl calcium lactate added in the invention has very good foaming effect, can promote the interior of slurry to generate fine foam in the autoclaved curing process, and the foam forms a plurality of micropores after the slurry is finally solidified, so that the density of the calcium silicate board can be greatly reduced, the heat preservation and heat insulation performance can be improved, meanwhile, the influence on the mechanical performance is very limited because the pore size of the micropores is smaller, and finally, the calcium silicate board is endowed with the characteristics of light weight, high strength and good heat preservation;
4. The calcium abietate powder has the waterproof effect, and in the autoclaved curing molding process, the calcium abietate powder has good dispersibility, and the calcium abietate powder can be uniformly dispersed in the whole calcium silicate board because the calcium abietate powder has good dispersion degree and good compatibility with the whole system and cannot be reagglomerated, so that the calcium abietate powder can improve the overall waterproof performance of the board and reduce the water absorption rate after the calcium silicate board is molded;
5. according to the invention, the added sodium aluminosilicate powder and calcium phytate powder are dissolved to a certain extent in a high-temperature strong alkali environment in the autoclaved curing process, so that the pH value of a reaction system can be buffered by decomposing out silicic acid and phytic acid, the intensity of the hydrothermal reaction of calcium hydroxide and silicon dioxide is further reduced, the crystal grains of the produced tobermorite calcium silicate hydrate are further refined, larger crystals are avoided, and the grain refining effect is very beneficial to the improvement of the mechanical property of the calcium silicate plate;
6. The high-heat-insulation and heat-preservation calcium silicate board obtained by the invention has the apparent density of 148-157 kg/m 3, the compressive strength of 20.9-22.5 MPa, the flexural strength of 21.5-24.1 MPa, the heat conductivity coefficient of 45.6-51.3 mW/(m.k), the surface hydrophobicity of 98.7-99.6% and the water absorption of 0.63-0.85%.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and explanation only and is not intended to limit the present invention.
Example 1: high heat insulation calcium silicate board
Step 1, oxidized polyethylene wax emulsion preparation
Adding sodium oleate, isooctyl alcohol polyoxyethylene ether phosphate and deionized water into a high-speed dispersion kettle, controlling the dispersion rate to 4800 r/min, heating and keeping the temperature to 92 ℃, dispersing for 35 minutes, then increasing the dispersion rate to 7500 r/min, adding oxidized polyethylene wax, dispersing for 3 hours at high speed, and cooling to room temperature to obtain oxidized polyethylene wax emulsion;
the mass ratio of the sodium oleate to the isooctyl alcohol polyoxyethylene ether phosphate to the water to the oxidized polyethylene wax is 2:3:79:35;
the softening point of the oxidized polyethylene wax was 105 ℃.
Step 2, preparation of aluminum borate whisker dispersion liquid
Adding aluminum borate whisker, polyvinyl alcohol and water into a high-speed stirrer according to the mass ratio of 50:2:140, heating to 75 ℃, keeping the constant temperature, stirring and dispersing for 6 hours at 2200 rpm, and cooling to room temperature to obtain aluminum borate whisker dispersion liquid;
the diameter of the aluminum borate whisker is 5 microns, and the length is 2000 microns;
The molecular weight of the polyvinyl alcohol is 13000g/mol, and the alcoholysis degree is 83%.
Step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 85:90:40:6:5:2:3:40, controlling the stirring speed to be 120 r/min, stirring and dispersing for 6 hours at the dispersing speed of 4000 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 130 minutes to obtain slurry;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
The particle size of the calcium abietate powder is 1 micron;
The particle size of the sodium aluminosilicate powder is 22 microns;
The particle size of the calcium phytate powder is 17 microns;
the addition mass of the oxidized polyethylene wax emulsion is 7wt% of the mass of the quartz powder.
Step 4, pressing plate
And (3) injecting the slurry into a template, and performing compression molding by using a cold press, wherein the compression molding pressure is 33MPa, the pressure maintaining time is 25 minutes, and the pre-pressing plate is obtained after pressure relief and demoulding.
Step 5, autoclaved curing
Pre-curing the pre-pressing plate for 17 hours at 65 ℃ and humidity of 95%, then putting the pre-pressing plate into an autoclave, introducing saturated steam for steam curing, controlling the temperature in the autoclave to be 180 ℃ and the pressure to be 0.9MPa, and preserving heat and pressure for 10 hours to obtain a crude product.
Step 6, drying and shaping
Drying the crude product at 78 ℃ until the moisture content is 0.9wt%, and polishing the surface to obtain the finished product of the high-heat-insulation calcium silicate board.
Example 2: high heat insulation calcium silicate board
Step 1, oxidized polyethylene wax emulsion preparation
Adding sodium oleate, isooctyl alcohol polyoxyethylene ether phosphate and deionized water into a high-speed dispersion kettle, controlling the dispersion rate to 3000 r/min, heating and keeping the temperature to 85 ℃, dispersing for 20 minutes, then increasing the dispersion rate to 6500 r/min, adding oxidized polyethylene wax, dispersing for 2 hours at high speed, and cooling to room temperature to obtain oxidized polyethylene wax emulsion;
The mass ratio of the sodium oleate to the isooctyl alcohol polyoxyethylene ether phosphate to the water to the oxidized polyethylene wax is 1:2:70:15;
the softening point of the oxidized polyethylene wax is 100 ℃.
Step 2, preparation of aluminum borate whisker dispersion liquid
Adding aluminum borate whisker, polyvinyl alcohol and water into a high-speed stirrer according to a mass ratio of 30:1:110, heating to 60 ℃, keeping constant temperature, stirring and dispersing for 5 hours at a rotating speed of 1500 rpm, and cooling to room temperature to obtain aluminum borate whisker dispersion liquid;
The diameter of the aluminum borate whisker is 0.3 micron, and the length is 30 microns;
The molecular weight of the polyvinyl alcohol is 7000g/mol, and the alcoholysis degree is 70%.
Step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 80:60:25:2:3:1:2:30, controlling the stirring speed to be 90 r/min, stirring and dispersing for 3 hours at the dispersing speed of 2500 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 70 minutes to obtain slurry;
The particle size of the quartz powder is 1 micron, and the silicon dioxide content is 92%;
the particle size of the slaked lime powder is 1 micron, and the calcium hydroxide content is 84%;
The particle size of the calcium abietate powder is 0.1 micron;
The particle size of the sodium aluminosilicate powder is 1 micron;
the particle size of the calcium phytate powder is 1 micron;
the addition mass of the oxidized polyethylene wax emulsion is 3wt% of the mass of the quartz powder.
Step 4, pressing plate
And (3) injecting the slurry into a template, and performing compression molding by using a cold press, wherein the compression molding pressure is 15MPa, the dwell time is 15 minutes, and the pre-pressing plate is obtained after pressure relief and demoulding.
Step 5, autoclaved curing
And (3) pre-curing the pre-pressed plate for 12 hours at 50 ℃ and 90% humidity, putting the pre-pressed plate into an autoclave, introducing saturated steam for steam curing, controlling the temperature in the autoclave to be 165 ℃ and the pressure to be 0.6MPa, and preserving heat and pressure for 8 hours to obtain a crude product.
Step 6, drying and shaping
Drying the crude product at 70 ℃ until the moisture content is 0.5wt%, and polishing the surface to obtain the finished product of the high-heat-insulation calcium silicate board.
Example 3: high heat insulation calcium silicate board
Step 1, oxidized polyethylene wax emulsion preparation
Adding sodium oleate, isooctyl alcohol polyoxyethylene ether phosphate and deionized water into a high-speed dispersion kettle, controlling the dispersion rate to be 5000 r/min, heating and keeping the temperature to 98 ℃, dispersing for 40 minutes, then increasing the dispersion rate to 9000 r/min, adding oxidized polyethylene wax, dispersing for 5 hours at high speed, and cooling to room temperature to obtain oxidized polyethylene wax emulsion;
The mass ratio of the sodium oleate to the isooctyl alcohol polyoxyethylene ether phosphate to the water to the oxidized polyethylene wax is 3:5:100:40;
The oxidized polyethylene wax has a softening point of 115 ℃.
Step 2, preparation of aluminum borate whisker dispersion liquid
Adding aluminum borate whisker, polyvinyl alcohol and water into a high-speed stirrer according to a mass ratio of 60:3:150, heating to 80 ℃ and keeping constant temperature, stirring and dispersing for 8 hours at a rotating speed of 3000 rpm, and cooling to room temperature to obtain aluminum borate whisker dispersion liquid;
The diameter of the aluminum borate whisker is 8 microns, and the length is 3000 microns;
the molecular weight of the polyvinyl alcohol is 20000g/mol, and the alcoholysis degree is 90%.
Step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 100:115:55:7:9:2.5:4:60, controlling the stirring speed to be 130 r/min, stirring and dispersing for 7 hours at the dispersing speed of 4500 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 150 minutes to obtain slurry;
The particle size of the quartz powder is 40 microns, and the silicon dioxide content is 98%;
The particle size of the slaked lime powder is 60 microns, and the calcium hydroxide content is 95%;
the particle size of the calcium abietate powder is 3 microns;
The particle size of the sodium aluminosilicate powder is 30 microns;
the particle size of the calcium phytate powder is 30 microns;
the addition mass of the oxidized polyethylene wax emulsion is 13 weight percent of the mass of the quartz powder.
Step 4, pressing plate
And (3) injecting the slurry into a template, and performing compression molding by using a cold press, wherein the compression molding pressure is 45MPa, the pressure maintaining time is 30 minutes, and the pre-pressing plate is obtained after pressure relief and demoulding.
Step 5, autoclaved curing
And (3) pre-curing the pre-pressed plate for 18 hours at the temperature of 75 ℃ and the humidity of 98%, putting the pre-pressed plate into an autoclave, introducing saturated steam for steam curing, controlling the temperature in the autoclave to be 190 ℃ and the pressure to be 1.3MPa, and preserving heat and pressure for 14 hours to obtain a crude product.
Step 6, drying and shaping
Drying the crude product at 95 ℃ until the moisture content is 1.5wt%, and polishing the surface to obtain the finished product of the high-heat-insulation calcium silicate board.
Comparative example 1: based on the embodiment 1, the preparation of the oxidized polyethylene wax emulsion in the step 1 is not carried out, the oxidized polyethylene wax emulsion is not added in the step 3 and pulping, and the specific operation is as follows:
Step 1, preparing oxidized polyethylene wax emulsion is not carried out;
Step2, the operation is the same as in example 1;
step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 85:90:40:6:5:2:3:40, controlling the stirring speed to 120 r/min, and stirring and dispersing for 8 hours and 10 minutes to obtain slurry at the dispersing speed of 4000 r/min;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
The particle size of the calcium abietate powder is 1 micron;
The particle size of the sodium aluminosilicate powder is 22 microns;
The particle size of the calcium phytate powder is 17 microns;
steps 4, 5, 6 are the same as in example 1.
Comparative example 2: in the step 3, in the pulping, 40 parts of aluminum borate whisker dispersion liquid is replaced by 10.4 parts of aluminum borate whisker according to the mass ratio of the aluminum borate whisker in the dispersion liquid, and the specific operation is as follows:
Step 1 the procedure is as in example 1;
Step 2, preparing aluminum borate whisker dispersion liquid is not carried out;
step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 85:90:10.4:6:5:2:3:40, controlling the stirring speed to 120 r/min, stirring and dispersing for 6 hours at the dispersing speed of 4000 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 130 minutes to obtain slurry;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
the diameter of the aluminum borate whisker is 5 microns, and the length is 2000 microns;
The particle size of the calcium abietate powder is 1 micron;
The particle size of the sodium aluminosilicate powder is 22 microns;
The particle size of the calcium phytate powder is 17 microns;
the addition mass of the oxidized polyethylene wax emulsion is 7wt% of the mass of the quartz powder;
steps 4, 5, 6 are the same as in example 1.
Comparative example 3: based on the example 1, step 3, the pulping process is not added with calcium stearoyl lactylate, 6 parts of calcium stearoyl lactylate is replaced by 6 parts of water, and the specific operation is as follows:
Steps 1 and 2 are the same as in example 1;
step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 85:90:40:5:2:3:46, controlling the stirring speed to 120 r/min, stirring and dispersing for 6 hours at the dispersing speed of 4000 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 130 minutes to obtain slurry;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
The particle size of the calcium abietate powder is 1 micron;
The particle size of the sodium aluminosilicate powder is 22 microns;
The particle size of the calcium phytate powder is 17 microns;
the addition mass of the oxidized polyethylene wax emulsion is 7wt% of the mass of the quartz powder;
steps 4, 5, 6 are the same as in example 1.
Comparative example 4: based on the example 1, step 3, the pulping is not added with the calcium abietate powder, 5 parts of the calcium abietate powder is replaced by 5 parts of water, and the specific operation is as follows:
Steps 1 and 2 are the same as in example 1;
step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to a mass ratio of 85:90:40:6:2:3:45, controlling stirring speed to 120 r/min, stirring and dispersing at 4000 r/min for 6 hours, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 130 minutes to obtain slurry;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
The particle size of the sodium aluminosilicate powder is 22 microns;
The particle size of the calcium phytate powder is 17 microns;
the addition mass of the oxidized polyethylene wax emulsion is 7wt% of the mass of the quartz powder;
steps 4, 5, 6 are the same as in example 1.
Comparative example 5: based on the example 1, the sodium aluminosilicate powder and the calcium phytate powder are not added in the step 3, and the sodium aluminosilicate powder and the calcium phytate powder which are 2 parts are replaced by 5 parts of water, and the concrete operation is as follows:
Steps 1 and 2 are the same as in example 1;
step 3, pulping
Adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder and water into a double-planetary stirrer according to a mass ratio of 85:90:40:6:5:45, controlling stirring speed to be 120 r/min, controlling dispersing speed to be 4000 r/min, stirring and dispersing for 6 hours, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 130 minutes to obtain slurry;
the particle size of the quartz powder is 35 microns, and the silicon dioxide content is 94%;
the particle size of the slaked lime powder is 30 microns, and the calcium hydroxide content is 92%;
The particle size of the calcium abietate powder is 1 micron;
the addition mass of the oxidized polyethylene wax emulsion is 7wt% of the mass of the quartz powder;
steps 4, 5, 6 are the same as in example 1.
Performance test:
for the high heat insulation and heat preservation calcium silicate boards obtained in examples 1,2 and 3 and comparative examples 1,2,3 and 4 and 5, indexes such as apparent density, compressive strength, flexural strength, heat conductivity, surface hydrophobicity and water absorption are tested by referring to JC/T564.1-2018 fiber reinforced calcium silicate board and GB/T10299-2011 Heat insulation material hydrophobicity test method, and test data are shown in Table 1:
TABLE 1
As can be seen from the data in table 1, in comparative example 1, in which the oxidized polyethylene wax emulsion was not added, the apparent density and the compressive strength were slightly increased, the flexural strength was slightly decreased, the thermal conductivity was significantly increased, the surface hydrophobicity was greatly decreased, and the water absorption was also increased to the highest value in all examples and comparative examples, which indicates that the addition of the oxidized polyethylene wax had a slight effect on the mechanical properties, but had a very significant effect on improving the surface hydrophobicity and reducing the water absorption of the calcium silicate board, and also had a certain effect on improving the heat insulation property; in comparative example 2, in which the aluminum borate whisker dispersion liquid is not prepared, the apparent density is obviously increased, the compressive strength and the flexural strength are obviously reduced, the heat conductivity coefficient is obviously increased, the surface hydrophobicity is slightly reduced, and the water absorption is more seriously increased, which means that the aluminum borate whisker is not pre-dispersed, is not prepared into the dispersion liquid in advance, is difficult to obtain better dispersion in the slurry preparation process, and finally, the dispersion uniformity in a calcium silicate plate is difficult to reach a more uniform degree, so that the mechanical property is greatly reduced and other properties are lost; in the comparative example 3, no stearoyl calcium lactate is added, the apparent density is increased to the maximum, the compressive strength and the flexural strength are not influenced, the heat conductivity is increased to the maximum in all examples and comparative examples, and the surface hydrophobicity and the water absorption are also increased to different degrees, which shows that the stearoyl calcium lactate has obvious effect on reducing the density of the calcium silicate board, has no negative effect on the mechanical strength while reducing the density, and can also improve the overall hydrophobic property of the calcium silicate board, and most importantly, the addition of the stearoyl calcium lactate can greatly improve the heat insulation and heat preservation property; in comparative example 4, the apparent density is slightly increased without adding calcium abietate powder, the flexural strength and the compressive strength are basically not different from those of the three examples, the heat conductivity coefficient is also slightly increased, the surface hydrophobicity is greatly reduced, and the water absorption is greatly increased, so that the calcium abietate powder can not only improve the surface hydrophobicity of the calcium silicate board, but also reduce the overall water absorption of the calcium silicate board; the comparative example 5, in which sodium aluminosilicate powder and calcium phytate powder are not added, has the advantages of dramatic decrease in apparent density, great decrease in compressive strength and flexural strength, larger increase in thermal conductivity, slightly decreased surface hydrophobicity and obvious increase in water absorption, thus indicating that the sodium aluminosilicate powder and the calcium phytate powder play a key role in improving the mechanical properties of the calcium silicate board, and also improving the heat insulation and heat preservation properties and reducing the overall water absorption of the calcium silicate board.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. A high heat insulation calcium silicate board is characterized in that:
the high-heat-insulation calcium silicate board is obtained through 6 steps of preparation of oxidized polyethylene wax emulsion, preparation of aluminum borate whisker dispersion liquid, pulping, pressing plate, autoclaved curing, drying and shaping;
The preparation method of the oxidized polyethylene wax emulsion comprises the following steps: adding sodium oleate, isooctyl alcohol polyoxyethylene ether phosphate and deionized water into a high-speed dispersion kettle, controlling the dispersion rate to be 3000-5000 r/min, heating and keeping the temperature to be 85-98 ℃, dispersing for 20-40 min, then increasing the dispersion rate to 6500-9000 r/min, adding oxidized polyethylene wax, dispersing at high speed for 2-5 h, and cooling to room temperature to obtain oxidized polyethylene wax emulsion;
the mass ratio of the sodium oleate to the isooctyl alcohol polyoxyethylene ether phosphate to the deionized water to the oxidized polyethylene wax is 1-3:2-5:70-100:15-40;
The preparation method of the aluminum borate whisker dispersion liquid comprises the following steps: putting aluminum borate whisker, polyvinyl alcohol and water into a high-speed stirrer according to the mass ratio of 30-60:1-3:110-150, heating to 60-80 ℃, keeping the constant temperature, stirring and dispersing for 5-8 hours at the rotating speed of 1500-3000 rpm, and cooling to room temperature to obtain aluminum borate whisker dispersion liquid;
The pulping method comprises the following steps: adding quartz powder, slaked lime powder, aluminum borate whisker dispersion liquid, calcium stearoyl lactate, calcium abietate powder, sodium aluminosilicate powder, calcium phytate powder and water into a double-planetary stirrer according to the mass ratio of 80-100:60-115:25-55:2-7:3-9:1-2.5:2-4:30-60, controlling the stirring speed to be 90-130 r/min, stirring and dispersing for 3-7 hours at the dispersing speed of 2500-4500 r/min, adding oxidized polyethylene wax emulsion, and continuing stirring and dispersing for 70-150 minutes to obtain slurry;
the addition mass of the oxidized polyethylene wax emulsion is 3-13 wt% of the mass of the quartz powder.
2. The high thermal insulation calcium silicate board according to claim 1, wherein:
The softening point of the oxidized polyethylene wax is 100-115 ℃.
3. The high thermal insulation calcium silicate board according to claim 1, wherein:
The diameter of the aluminum borate whisker is 0.3-8 microns, and the length of the aluminum borate whisker is 30-3000 microns;
The molecular weight of the polyvinyl alcohol is 7000-20000 g/mol, and the alcoholysis degree is 70-90%.
4. The high thermal insulation calcium silicate board according to claim 1, wherein:
The particle size of the quartz powder is 1-40 microns, and the silicon dioxide content is 92-98%;
The particle size of the slaked lime powder is 1-60 microns, and the content of calcium hydroxide is 84-95%;
The particle size of the sodium aluminosilicate powder is 1-30 microns;
The particle size of the calcium abietate powder is 0.1-3 microns;
the particle size of the calcium phytate powder is 1-30 microns.
5. The high thermal insulation calcium silicate board according to claim 1, wherein:
the pressing plate comprises the following steps: and (3) injecting the slurry into a template, and performing compression molding by using a cold press, wherein the compression molding pressure is 15-45 MPa, the dwell time is 15-30 minutes, and the pre-pressing plate is obtained after pressure relief and demoulding.
6. The high thermal insulation calcium silicate board according to claim 5, wherein:
the autoclaved curing method comprises the following steps: and (3) pre-curing the pre-pressed plate for 12-18 hours at the temperature of 50-75 ℃ and the humidity of 90-98%, then placing the pre-pressed plate into an autoclave, introducing saturated steam for autoclaved curing, controlling the temperature in the autoclave to be 165-190 ℃ and the pressure to be 0.6-1.3 MPa, and preserving heat and pressure for 8-14 hours to obtain a crude product.
7. The high thermal insulation calcium silicate board according to claim 6, wherein:
the drying and shaping method comprises the following steps: and drying the crude product at 70-95 ℃ until the moisture content is 0.5-1.5wt%, and polishing the surface to obtain the high-heat-insulation calcium silicate board finished product.
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| CN109318544A (en) * | 2018-09-10 | 2019-02-12 | 桂林桂特板业有限公司 | A kind of calcium silicate board and preparation method thereof |
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