CN115259785A - Method for preparing aerogel polyphenyl insulation board based on wet-mixed material stirring technology - Google Patents
Method for preparing aerogel polyphenyl insulation board based on wet-mixed material stirring technology Download PDFInfo
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- 239000004964 aerogel Substances 0.000 title claims abstract description 50
- 238000009413 insulation Methods 0.000 title claims abstract description 41
- 238000003756 stirring Methods 0.000 title claims abstract description 30
- 229920006389 polyphenyl polymer Polymers 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 55
- 239000004568 cement Substances 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 238000000748 compression moulding Methods 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000011398 Portland cement Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 8
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 8
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 8
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 239000004965 Silica aerogel Substances 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000008187 granular material Substances 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 5
- 238000005187 foaming Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2201/20—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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a method for preparing an aerogel polyphenyl insulation board based on a wet-mixed material stirring technology, which comprises the following steps of: A. mixing cement, filler, water reducer and adhesive in proportion, adding water and stirring to form cement slurry; B. mixing and stirring the cement slurry obtained in the step A and EPS particles, and coating the mixture on the surfaces of the EPS particles to form wet-mixed particles; C. b, mixing the wet-mixed particle material obtained in the step B with hydrophobic aerogel particles through dispersion stirring to form aerogel polyphenyl particles; D. c, pouring the uniformly mixed aerogel polyphenyl particles obtained in the step C into a mould, carrying out compression molding according to a certain compression ratio, then placing for 1-3 days, and demoulding after the insulation board is hardened; E. and (3) placing the hardened large-block heat-insulation plate cube for 3-5 days under natural conditions, and cutting to obtain the heat-insulation plate. The wet mixing material stirring technology can realize that the hydrophobic aerogel is uniformly dispersed in the polyphenyl insulation board, effectively reduces the heat conductivity coefficient, increases the incombustibility of the polyphenyl insulation board, and does not cause the loss of strength.
Description
Technical Field
The invention belongs to the technical field of preparation of heat-insulating materials, and particularly relates to a method for preparing an aerogel polyphenyl heat-insulating plate based on a wet-mixed material stirring technology.
Background
According to the relevant regulations, the civil building external thermal insulation material is required to adopt a material with a grade A combustion performance, the grade A non-combustible thermal insulation boards used in the current market mainly comprise rock wool boards, foam concrete, inorganic thermal mortar, foamed cement boards and the like, but the inorganic thermal insulation materials have generally high heat conductivity coefficient and do not have a good energy-saving and thermal insulation effect, while the organic thermal insulation materials have good thermal insulation performance, but the organic matter has poor fireproof performance, and most of the organic matter is grade B, so that an excellent thermal insulation material which not only has good thermal insulation effect but also can achieve grade A non-combustible is urgently needed.
The abundant nano-pore structure of the silicon dioxide aerogel can effectively inhibit the convection conduction of gas molecules, and the functional material absorbs and reflects thermal radiation, so that the thermal conductivity of the material at 600 ℃ is 0.012W/m.k, and the material has the characteristics of high porosity and low thermal conductivity. Therefore, the silicon aerogel with excellent heat-insulating property is compounded into the glue powder polyphenyl heat-insulating board, and the defects of poor fireproof property, poor durability, low mechanical strength and the like of the existing organic heat-insulating material can be overcome. But because the hydrophobic characteristic of silica aerogel leads to its compound difficult with rubber powder polyphenyl granule heated board, perhaps there is a large amount of cohesion phenomena of compound back aerogel, makes the thermal conductivity of heated board not change, greatly reduced the compressive strength of heated board on the contrary. Therefore, it is also necessary to develop a new process to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for preparing an aerogel polyphenyl insulation board based on a wet-mixed material stirring technology, which can realize that hydrophobic aerogel is uniformly dispersed in the polyphenyl insulation board.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for preparing an aerogel polyphenyl insulation board based on a wet mixing material stirring technology comprises the following steps:
A. mixing 800-1200 parts of cement, 0-100 parts of filler, 6-10 parts of water reducing agent and 20-30 parts of adhesive, adding 400-450 parts of water, mixing and stirring for 60-90s to form cement slurry;
B. b, mixing and stirring the cement slurry obtained in the step A and 80-120 parts of EPS particles for 90-120s, and coating the mixture on the surfaces of the EPS particles to form a wet-mixed particle material;
C. b, mixing the wet-mixed particle material obtained in the step B with 10-30 parts of hydrophobic aerogel particles for 90-120s through dispersion stirring to form aerogel polyphenyl particles;
D. c, pouring the uniformly mixed aerogel polyphenyl particles obtained in the step C into a mold, carrying out compression molding according to a designed compression ratio, then placing for 1-3 days, and demolding after the insulation board is hardened;
E. d, placing the cube of the hardened large insulation board obtained in the step D for 3-5 days under natural conditions, and cutting to obtain the insulation board.
Preferably, in the step A, the cement is ordinary portland cement and/or sulphoaluminate cement, and the strength grade is 42.5 or 52.5; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is between 20 and 30 percent; the adhesive is hydroxypropyl methylcellulose (HPMC) and has the viscosity of 6-10 w.
Preferably, in the step B, the EPS particles are graphene-modified secondary expanded particles, and the particle size of the particles is 2-5mm.
Preferably, in step C, the aerogel is hydrophobic silica aerogel, and the particle size is 1-100nm.
Preferably, in the step C, the wet-mixed material particles and the aerogel are stirred in a closed horizontal-shaft stirrer for 90-120s.
Preferably, in step D, the compression ratio is between 30% and 60%.
Compared with the prior art, the invention has the following beneficial effects:
1. hydrophobic aerogel is at the in-process compound with rubber powder polyphenyl granule heated board, because the hydrophobicity of aerogel leads to compound the degree of difficulty big, perhaps compound back aerogel has a large amount of cohesion phenomena, makes the thermal conductivity of heated board not change, greatly reduced the compressive strength of heated board on the contrary, wet material stirring technique of stirring can realize among the hydrophobic aerogel homodisperse polyphenyl heated board, effectual reduction coefficient of heat conductivity increases its incombustibility, and does not cause the loss of intensity.
2. The preparation process disclosed by the invention is environment-friendly and non-toxic, is simple to operate and convenient to implement, the aerogel and polyphenyl particle insulation board is compounded by improving the process, the industrial development is facilitated, a high-efficiency production line is formed, and the development of energy conservation and emission reduction of green buildings in China is promoted.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
In the examples, the proportions of the raw materials are in parts by weight.
Example 1
A. Preparing cement slurry: firstly, mixing and stirring 800 parts of PO52.5 ordinary portland cement, 100 parts of a filling material, 6 parts of a polycarboxylic acid water reducing agent and 20 parts of dry powder of hydroxypropyl methyl cellulose for 60s, and then adding 400 parts of water and stirring for 60s to form cement slurry;
B. b, after secondary foaming, mixing 80 parts of EPS particles with the cement slurry formed in the step A, and stirring for 90 seconds in a closed horizontal shaft type stirrer to enable the cement slurry to be fully coated on the surfaces of the EPS particles to form wet-mixed particle materials;
C. mixing the wet-mixed granular material with 10 parts of hydrophobic silica aerogel granules, and putting the mixture into a closed stirrer to be fully stirred for 90s, so that the aerogel is uniformly bonded on the surfaces of the wet-mixed granular material;
D. pouring the uniformly mixed aerogel polyphenyl particles into a mould, adopting the pressure of 4MPa to perform compression molding according to the compression ratio of 3:2, then placing for 1 day, and demolding after the heat insulation board is hardened;
E. after demolding, the molded product is placed for 3 days under natural conditions and cut into sample insulation boards with the thickness of 30cm for testing.
Example 2
A. Preparing cement slurry: firstly, 1000 parts of PO52.5 ordinary portland cement, 50 parts of a filling material, 8 parts of a polycarboxylic acid water reducing agent and 25 parts of hydroxypropyl methyl cellulose are mixed and stirred for 90s, and then 450 parts of water is added and stirred for 60s to form cement slurry;
B. mixing 100 parts of EPS particles subjected to secondary foaming with the cement slurry formed in the step A in a closed horizontal shaft type stirrer, and stirring for 120s to enable the cement slurry to be fully coated on the surfaces of the EPS particles to form wet-mixed particles;
C. mixing the wet-mixed granular material with 20 parts of hydrophobic aerogel granules, and putting the mixture into a closed stirrer to be fully stirred for 120s, so that the aerogel is uniformly adhered to the surfaces of the wet-mixed granular material;
D. pouring the uniformly mixed aerogel polyphenyl particles into a mould, adopting the pressure of 4MPa to perform compression molding according to the compression ratio of 5:3, then placing for 1 day, and demolding after the heat insulation board is hardened;
E. after demolding, the plate is placed for 3 days under natural conditions and cut into sample insulation plates with the thickness of 30cm for testing.
Example 3
A. Preparing cement slurry: firstly, 1200 parts of PO52.5 ordinary portland cement, 0 part of filler, 10 parts of polycarboxylic acid water reducer and 30 parts of hydroxypropyl methyl cellulose are mixed and stirred for 60s, and then 450 parts of water is added and stirred for 90s to form cement slurry;
B. after secondary foaming, 120 parts of EPS particles are mixed with the cement slurry formed in the step A and stirred for 90 seconds in a closed horizontal shaft type stirrer, so that the cement slurry is fully coated on the surfaces of the EPS particles to form wet-mixed particle materials;
C. mixing the wet-mixed granular material with 30 parts of hydrophobic aerogel granules, and putting the mixture into a closed stirrer to be fully stirred for 90 seconds to enable the aerogel to be uniformly bonded on the surfaces of the wet-mixed granular material;
D. pouring the uniformly mixed aerogel polyphenyl particles into a mould, adopting the pressure of 4MPa to perform compression molding according to the compression ratio of 5:4, then placing for 1 day, and demolding after the heat insulation board is hardened;
E. after demolding, the plate is placed for 5 days under natural conditions and cut into sample insulation plates with the thickness of 30cm for testing.
Comparative example
A. Preparing cement slurry: firstly, 1000 parts of PO52.5 ordinary portland cement, 50 parts of a filler, 8 parts of a polycarboxylic acid water reducing agent, 25 parts of hydroxypropyl methyl cellulose and 20 parts of hydrophobic silica aerogel are mixed and stirred for 90s, and then 450 parts of water is added and stirred for 60s to form cement slurry;
B. mixing 100 parts of EPS particles subjected to secondary foaming with the cement slurry formed in the step A in a horizontal shaft type stirrer, and stirring for 120s to enable the cement slurry to be fully coated on the surfaces of the EPS particles to form wet-mixed particles;
C. pouring the uniformly mixed aerogel polyphenyl particles into a mould, adopting the pressure of 4MPa to perform compression molding according to the compression ratio of 5:3, then placing for 1 day, and demolding after the heat insulation board is hardened;
D. after demolding, the plate is placed for 3 days under natural conditions and cut into sample insulation plates with the thickness of 30cm for testing.
In the above examples, the cement used may be PO42.5 portland cement, PO42.5 sulphoaluminate cement, PO52.5 sulphoaluminate cement, or the like, in addition to PO52.5 portland cement; the water reducing rate of the used polycarboxylic acid water reducing agent is between 20 and 30 percent; the viscosity of the hydroxypropyl methyl cellulose used is 6w-10w; the EPS particles are graphene-modified secondary foaming particles, and the particle size of the particles is 2-5mm; the particle size of the hydrophobic silica aerogel used is 1-100nm.
The product performance prepared by different process parameters is tested according to the JG/T158-2013 standard, and the test results are shown in Table 1.
Table 1 Process parameters and Properties in the examples
As can be seen from table 1, aerogel modified polystyrene insulation board products prepared by stirring wet-mixed materials in embodiments 1 to 3 of the present invention have a lower thermal conductivity, which is about 0.060 compared with the thermal conductivity of glue powder polystyrene insulation boards in the market, the thermal conductivity is significantly reduced, the strength is not changed, the flame retardant coefficient reaches a level A2, and the aerogel modified polystyrene insulation board products have good thermal insulation and flame retardant properties; and comparative example 1 is because directly adding the aerogel, and the aerogel dispersion is inhomogeneous, and it is reunited to hold the group in the heated board, makes the intensity of heated board obviously descend coefficient of heat conductivity obviously higher, and weatherability also obviously reduces to hold the aerogel of group and can not play effectual effect in the heated board, can not reduce coefficient of heat conductivity, so the coefficient of heat conductivity of comparative example is higher.
The preparation process disclosed by the invention is environment-friendly and non-toxic, is simple to operate and convenient to implement, realizes the compounding of the aerogel and the polyphenyl particle insulation board through the improvement on the process, is convenient to realize the development of industrialization, forms a high-efficiency production line, and promotes the development of energy conservation and emission reduction of green buildings in China.
Claims (6)
1. A method for preparing an aerogel polyphenyl insulation board based on a wet mixing material stirring technology is characterized by comprising the following steps:
A. mixing 800-1200 parts of cement, 0-100 parts of filler, 6-10 parts of water reducing agent and 20-30 parts of adhesive, adding 400-450 parts of water, mixing and stirring for 60-90s to form cement slurry;
B. mixing and stirring the cement slurry obtained in the step A and 80-120 parts of EPS particles for 90-120s, and coating the surfaces of the EPS particles to form wet-mixed particles;
C. b, mixing the wet-mixed particle material obtained in the step B with 10-30 parts of hydrophobic aerogel particles for 90-120s through dispersion stirring to form aerogel polyphenyl particles;
D. c, pouring the uniformly mixed aerogel polyphenyl particles obtained in the step C into a mold, carrying out compression molding according to a designed compression ratio, then placing for 1-3 days, and demolding after the insulation board is hardened;
E. and D, placing the cube of the hardened large insulation board obtained in the step D for 3-5 days under natural conditions, and cutting to obtain the insulation board.
2. The method for preparing the aerogel polystyrene insulation board based on the wet-mixing stirring technology as claimed in claim 1, wherein in the step A, the cement is ordinary portland cement and/or sulphoaluminate cement, and the strength grade is 42.5 or 52.5; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is 20-30%; the adhesive is hydroxypropyl methyl cellulose, and the viscosity is 6w-10w.
3. The method for preparing the aerogel polystyrene insulation board based on the wet-mixing stirring technology as claimed in claim 1, wherein in the step B, the EPS particles are graphene-modified secondary expanded particles with particle size of 2-5mm.
4. The method for preparing the aerogel polyphenyl insulation board based on the wet-mixed material stirring technology as claimed in claim 1, wherein in the step C, the aerogel is hydrophobic silica aerogel, and the particle size is 1-100nm.
5. The method for preparing the aerogel polystyrene insulation board based on the wet-mixing stirring technology as claimed in claim 1, wherein in the step C, the wet-mixing particles and the aerogel are stirred in a closed horizontal shaft type stirrer for 90-120s.
6. The method for preparing the aerogel polyphenyl insulation board based on the wet mixing stirring technology as claimed in claim 1, wherein in the step D, the compression ratio is 30% -60%.
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| CN202210766465.2A CN115259785A (en) | 2022-07-01 | 2022-07-01 | Method for preparing aerogel polyphenyl insulation board based on wet-mixed material stirring technology |
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Citations (6)
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|---|---|---|---|---|
| EP2620567A2 (en) * | 2012-01-30 | 2013-07-31 | Sto Ag | Composite heat insulation system with a fire barrier, heat insulation element and use of the heat insulation element as a fire barrier |
| US20160208069A1 (en) * | 2013-08-27 | 2016-07-21 | Sh Energy & Chemical Co., Ltd. | Thermal Insulation Expandable Polystyrene Particles and Method of Preparing the Same |
| CN107344837A (en) * | 2017-09-06 | 2017-11-14 | 建研科技股份有限公司 | Method for preparing hydrophobic silica aerogel cement-based thermal insulation material |
| KR20180114679A (en) * | 2017-04-11 | 2018-10-19 | 주식회사정양에스지 | Lightweight Concrete Panels improving efficiency of insulation and bending strength and Manufacturing method thereof |
| CN109721312A (en) * | 2019-03-13 | 2019-05-07 | 北京新时代寰宇科技发展有限公司 | A kind of A grades of non-ignitable aeroge polyphenylene heat insulation slab and preparation method thereof |
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Application publication date: 20221101 |