CN115057681A - Graphene modified high-strength high-heat-insulation heat-preservation plate and preparation method thereof - Google Patents
Graphene modified high-strength high-heat-insulation heat-preservation plate and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 71
- 238000009413 insulation Methods 0.000 title claims abstract description 41
- 238000004321 preservation Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 48
- 229920006389 polyphenyl polymer Polymers 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000004088 foaming agent Substances 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 16
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 9
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 9
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 9
- 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 9
- 239000011268 mixed slurry Substances 0.000 claims description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000001273 butane Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical group CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 7
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002223 polystyrene Polymers 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
- 239000004604 Blowing Agent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- JYGQDULZZKKFTG-UHFFFAOYSA-N OS([AlH2])(=O)=O Chemical compound OS([AlH2])(=O)=O JYGQDULZZKKFTG-UHFFFAOYSA-N 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- -1 polyphenylene Polymers 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000126 substance Substances 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
- C04B28/06—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
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a graphene modified high-strength high-heat-insulation heat-preservation plate and a preparation method thereof, belonging to the field of building materials and comprising the following raw materials in parts by weight: 800-1200 parts of a cementing material, 0-200 parts of a filler, 10-30 parts of graphene, 30-50 parts of polyphenyl particles, 5-20 parts of a foaming agent, 10-30 parts of an adhesive, 4-8 parts of a water reducing agent and 4-2 parts of a dispersing agent ECO-23000.2. The A-grade non-combustible graphene polyphenyl plate overcomes the defects of poor fire resistance, poor durability, low mechanical strength and the like of the existing organic heat insulation material, has the advantages of A-grade non-combustible property, low heat conductivity coefficient, high compressive strength, strong crack resistance, environmental protection, no toxicity and the like, and is suitable for a heat insulation system of a building outer protective structure.
Description
Technical Field
The invention belongs to the technical field of insulation boards, and particularly relates to a graphene modified high-strength high-heat-insulation board and a preparation method thereof.
Background
With the enhancement of environmental protection consciousness, the building heat-insulating material industry is developing towards green energy conservation. Each building heat-insulating material has respective characteristics, such as high strength and high temperature resistance of the inorganic heat-insulating material, but is not beneficial to mechanical production and has high water absorption; the organic heat-insulating material has excellent heat-insulating property, but is easy to age and low in strength, and has certain fire-proof potential safety hazard. The composite heat-insulating material can well fuse the organic heat-insulating material and the inorganic heat-insulating material, exerts respective advantages and makes up respective disadvantages. Because the polyphenyl granules have certain elasticity, the sub-elastomer with certain strength is formed under the wrapping of ZL gelled material containing inorganic and organic powder and various fiber components, and therefore, the formed rubber powder polyphenyl granule heat-insulating slurry can absorb and reduce expansion and contraction deformation caused by the influence of external natural conditions. The glue powder polyphenyl particle external thermal insulation technology adopts a flexible gradual change technical route on the structural design, deformation and induced deformation are allowed, the heat conductivity coefficient of each layer of material is not large, the elastic modulus of the materials are mutually matched, and the flexible deformation of the outer layer of material is higher than that of the inner layer of material. However, the glue powder polyphenyl particles have the problems that the strength is sometimes too low, the glue powder polyphenyl particles are easy to break and fall off, and compared with other materials, the heat conductivity coefficient is 0.065W/(m.K), and the heat insulation effect is poor. Therefore, it is important to modify the polystyrene particles of the rubber powder to improve the strength and the heat-insulating property of the polystyrene particles.
Graphene is the thinnest and hardest nano material in the world, and graphene oxide forms a covalent bond with a polymer during polymerization, so that the compactness of the EPS plate is improved. The charred material forms a fluffy and closed compact charcoal layer under the action of the gas decomposed by the expanding agent, and the charcoal layer can not burn and can prevent the heat conduction between the polymer and the heat source, thereby achieving the purpose of flame retardance. On the other hand, the formed compact carbon layer can prevent the diffusion of gas generated by pyrolysis while preventing the contact of air and the polymer, so that the polymer cannot obtain enough oxygen and heat, and is gradually extinguished to achieve the flame-retardant effect. Therefore, the graphene and the rubber powder polystyrene board are compounded, and the high-strength high-heat-insulation heat-preservation board is very necessary to be prepared.
In the prior art, most of the non-covalent bond connection methods are used for directly carrying out functional modification on the surface of graphene, multiple times of heating or ice bath is needed, the temperature control is very complicated, and then the graphene is compounded with EPS particles and then is subjected to foaming molding, so that the steps are multiple and complicated.
Disclosure of Invention
The invention aims to provide a graphene modified high-strength high-heat-insulation heat-preservation plate which can realize high strength and high heat insulation and is A-grade non-combustible.
The invention also aims to provide a preparation method of the graphene modified high-strength high-heat-insulation heat-preservation plate, which is simple to operate and low in cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a graphene modified high-strength high-heat-insulation heat-preservation plate which is prepared from the following components in parts by weight: 800-1200 parts of a cementing material, 0-200 parts of a filler, 10-30 parts of graphene, 30-50 parts of polyphenyl particles, 5-20 parts of a foaming agent, 10-30 parts of an adhesive, 2-8 parts of a water reducing agent and 2-2 parts of a dispersing agent ECO-23000.2.
Preferably, the cementing material is quick-hardening sulpho-aluminium cement with the strength grade of 52.5 MPa.
Preferably, the filler is one or more of silica fume, glass beads and fly ash.
Preferably, the graphene is graphene oxide sheets, and the particle size is 1-10 μm.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is 20-30 percent
Preferably, the adhesive is hydroxypropyl methyl cellulose (HPMC) and the viscosity is 6 w-10 w.
Preferably, the polyphenyl granules are primary foaming granules, and the particle size of the granules is 1-3 mm.
Preferably, the blowing agent is a butane blowing agent.
In a second aspect, the invention provides a preparation method of the graphene modified high-strength high-heat-insulation heat-preservation plate, which comprises the following steps:
A. preparing a graphene modified solution: adding a dispersing agent ECO-2300 into water, uniformly stirring, slowly adding graphene, and performing ultrasonic dispersion for 10-20 min;
B. mixing dry powder: placing the cementing material, the filler, the polyphenyl granules, the foaming agent and the water reducing agent into a stirrer to be stirred for 60-90 s;
C. adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 5-10min to obtain modified graphene polyphenyl particle mixed slurry;
D. c, pouring the uniformly mixed graphene and polyphenyl particle mixed slurry obtained in the step C into a mold, covering a cover plate, and heating and pressurizing to enable polyphenyl particles to be foamed for the second time;
E. and (5) placing for 1-3 days, hardening the heat insulation plate, and then demolding and maintaining.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, after a proper modifier is selected, graphene is uniformly dispersed in the solution through ultrasonic dispersion, and then the modified graphene solution is directly used for preparing the rubber powder polyphenyl insulation board, so that the operation is simple, the preparation process is greatly optimized, and the compression resistance of the insulation board is greatly improved through secondary foaming extrusion at the later stage.
2. Compared with other insulation boards of the same type, the insulation board prepared by the invention has better strength and heat insulation performance, is non-combustible at A level, and has the following specific performances: density 180- 3 The heat conductivity coefficient is 0.049-0.054W/(m.K), the compressive strength is 0.33-0.40MPa, and the combustion grade is A2 grade.
3. According to the invention, other harmful and polluting substances are not generated in the implementation process, and the compounding of the graphene and polyphenyl particle insulation board is realized through the improvement on the process.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The proportions of the raw materials in the following examples are in parts by weight.
Example 1
A. Preparing a graphene modified solution: 0.2 part of dispersing agent ECO-2300 is added into 300 parts of water to be uniformly stirred, 10 parts of graphene oxide sheets are slowly added to carry out solution ultrasonic dispersion for 20min to prepare the graphene modified suspension.
B. Mixing dry powder: 800 parts of rapid hardening sulphoaluminate cement, 200 parts of fly ash, 30 parts of polyphenyl granules, 5 parts of butane foaming agent, 20 parts of hydroxypropyl methyl cellulose and 4 parts of polycarboxylic acid water reducing agent are put into a stirrer to be stirred for 60 s.
C. And D, adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 5min to obtain modified graphene and polyphenyl particle mixed slurry.
D. And pouring the uniformly mixed graphene polyphenyl particle slurry into a mould, covering a cover plate, heating and pressurizing for 10min to enable polyphenyl particles to be foamed for the second time, increasing the acting force among the particles and improving the strength.
E. Standing for 3 days, hardening the insulation board, demolding and maintaining.
Example 2
A. Preparing a graphene modified solution: adding 1 part of dispersant ECO-2300 into 300 parts of water, stirring uniformly, slowly adding 20 parts of graphene oxide sheets, and performing solution ultrasonic dispersion for 15min to prepare the graphene modified suspension.
B. Mixing dry powder: 1000 parts of rapid hardening sulphoaluminate cement, 100 parts of fly ash, 40 parts of polyphenyl granules, 10 parts of butane foaming agent, 25 parts of hydroxypropyl methyl cellulose and 6 parts of polycarboxylic acid water reducing agent are placed into a stirrer to be stirred for 80 s.
C. And D, adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 10min to obtain modified graphene and polyphenyl particle mixed slurry.
D. Pouring the uniformly mixed graphene polyphenyl particle slurry into a mold, covering a cover plate, heating and pressurizing for 13min to enable polyphenyl particles to foam for the second time, increasing the acting force among the particles and improving the strength.
E. Standing for 3 days, hardening the insulation board, demolding and maintaining.
Example 3
A. Preparing a graphene modified solution: adding 2 parts of dispersant ECO-2300 into 300 parts of water, stirring uniformly, slowly adding 30 parts of graphene oxide sheets, and performing solution ultrasonic dispersion for 10min to prepare the graphene modified suspension.
B. Mixing dry powder: 1200 parts of quick-hardening sulphoaluminate cement, 50 parts of polyphenyl granules, 20 parts of butane foaming agent, 30 parts of hydroxypropyl methyl cellulose and 8 parts of polycarboxylic acid water reducing agent are put into a stirrer to be stirred for 90 seconds.
C. And D, adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 15min to obtain modified graphene and polyphenyl particle mixed slurry.
D. Pouring the uniformly mixed graphene polyphenyl particle slurry into a mold, covering a cover plate, heating and pressurizing for 15min to enable polyphenyl particles to foam for the second time, increasing the acting force among the particles and improving the strength.
E. Standing for 3 days, hardening the insulation board, demolding and maintaining.
Comparative example 1
A. Preparing a graphene modified solution: adding 1 part of dispersant ECO-2300 into 300 parts of water, stirring uniformly, slowly adding 20 parts of graphene oxide sheets, and stirring for 15min to prepare the graphene modified suspension.
B. Mixing dry powder: putting 1000 parts of quick-hardening sulphoaluminate cement, 100 parts of fly ash, 40 parts of polyphenyl granules, 10 parts of butane foaming agent, 25 parts of hydroxypropyl methyl cellulose and 6 parts of polycarboxylic acid water reducing agent into a stirrer and stirring for 80 s.
C. And D, adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 10min to obtain modified graphene polyphenyl particle mixed slurry.
D. Pouring the uniformly mixed graphene polyphenyl particle slurry into a mold, covering a cover plate, heating and pressurizing for 13min to enable polyphenyl particles to foam for the second time, increasing the acting force among the particles and improving the strength.
E. Standing for 3 days, hardening the insulation board, demolding and maintaining.
Comparative example 2
A. Preparing a graphene modified solution: and (3) carrying out solution ultrasonic dispersion on 20 parts of graphene oxide sheets for 15min to prepare the graphene modified suspension.
B. Mixing dry powder: putting 1000 parts of quick-hardening sulphoaluminate cement, 100 parts of fly ash, 40 parts of polyphenyl granules, 10 parts of butane foaming agent, 25 parts of hydroxypropyl methyl cellulose and 6 parts of polycarboxylic acid water reducing agent into a stirrer and stirring for 80 s.
C. And D, adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 10min to obtain modified graphene and polyphenyl particle mixed slurry.
D. Pouring the uniformly mixed graphene polyphenyl particle slurry into a mold, covering a cover plate, heating and pressurizing for 13min to enable polyphenyl particles to foam for the second time, increasing the acting force among the particles and improving the strength.
E. Standing for 3 days, hardening the heat preservation plate, then demoulding and maintaining.
In the above examples, the strength grade of the rapid hardening sulphoaluminate cement used was 52.5 MPa.
In the above embodiments, the filler used may be silica fume, glass beads, or the like, in addition to fly ash.
In the above examples, the graphene oxide sheets used had a particle size of 1 to 10 μm.
In the above examples, the water reducing rate of the polycarboxylic acid water reducing agent used was 20% to 30%.
In the above examples, the hydroxypropylmethylcellulose used had a viscosity of 6w to 10 w.
In the above examples, the polyphenylene particles used were primary expanded particles having a particle diameter of 1 to 3 mm.
The properties such as density, compressive strength, thermal conductivity coefficient and the like of the insulation boards obtained in the embodiments 1-3 and the comparative example are measured according to the JG/T158-material 2013 standard, and the results are shown in Table 1.
Table 1 performance test results of each insulation board in each embodiment
As can be seen from table 1, the graphene modified polyphenyl insulation board product prepared in embodiments 1 to 3 of the present invention has a low thermal conductivity and a high strength, and the flame retardant coefficient reaches a level a 2; the graphene prepared in the comparative example 1 cannot be uniformly dispersed because ultrasonic dispersion is not adopted and the dispersion is not uniform; in contrast, in the preparation of comparative example 2, since no dispersant is added, graphene cannot be uniformly dispersed; compared with the comparative examples 1 and 2, the thermal conductivity of the insulation board is obviously reduced due to the uneven dispersion of the graphene, the thermal conductivity is obviously higher, the weather resistance is also obviously reduced, and the thermal conductivity cannot be reduced, so that the thermal conductivity of the comparative examples is higher.
According to the invention, after a proper modifier is selected, graphene is uniformly dispersed in the solution through ultrasonic dispersion, and then the modified graphene solution is directly used for preparing the rubber powder polyphenyl insulation board, so that the operation is simple, the preparation process is greatly optimized, and the compression resistance of the insulation board is greatly improved through secondary foaming extrusion at the later stage.
Claims (9)
1. The graphene modified high-strength high-heat-insulation heat-preservation board is characterized by being prepared from the following components in parts by weight: 800-1200 parts of a cementing material, 0-200 parts of a filler, 10-30 parts of graphene, 30-50 parts of polyphenyl particles, 5-20 parts of a foaming agent, 10-30 parts of an adhesive, 2-8 parts of a water reducing agent and 2-2 parts of a dispersing agent ECO-23000.2.
2. The graphene modified high-strength high-heat-insulation heat-preservation plate according to claim 1, wherein the cementing material is rapid hardening sulphoaluminate cement, and the strength grade is 52.5 MPa.
3. The graphene modified high-strength high-heat-insulation heat-preservation plate according to claim 1, wherein the filler is one or more of silica fume, glass beads and fly ash.
4. The graphene-modified high-strength high-heat-insulation heat-preservation plate according to claim 1, wherein the graphene is graphene oxide sheets, and the particle size of the graphene is 1-10 μm.
5. The graphene modified high-strength high-heat-insulation heat-preservation plate according to claim 1 is characterized in that the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is 20-30%.
6. The graphene modified high-strength high-heat-insulation heat-preservation plate according to claim 1, wherein the adhesive is hydroxypropyl methyl cellulose and has a viscosity of 6 w-10 w.
7. The graphene modified high-strength high-heat-insulation heat-preservation plate as claimed in claim 1, wherein the polyphenyl particles are primary foamed particles, and the particle size of the particles is 1-3 mm.
8. The graphene modified high-strength high-heat-insulation heat-preservation plate according to claim 1, wherein the foaming agent is a butane foaming agent.
9. The preparation method of the graphene modified high-strength high-heat-insulation heat-preservation plate as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
A. preparing a graphene modified solution: adding a dispersing agent ECO-2300 into water, uniformly stirring, slowly adding graphene, and performing ultrasonic dispersion for 10-20 min;
B. mixing dry powder: placing the cementing material, the filler, the polyphenyl particles, the foaming agent and the water reducing agent into a stirrer and stirring for 60-90 s;
C. adding the graphene modified solution prepared in the step A into the dry powder prepared in the step B, and stirring for 5-10min to obtain modified graphene polyphenyl particle mixed slurry;
D. c, pouring the uniformly mixed graphene and polyphenyl particle mixed slurry obtained in the step C into a mold, covering a cover plate, and heating and pressurizing to enable polyphenyl particles to be foamed for the second time;
E. and (5) placing for 1-3 days, hardening the heat insulation plate, and then demolding and maintaining.
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