CN111517708A - Graphite modified polystyrene inorganic insulation board and preparation method thereof - Google Patents
Graphite modified polystyrene inorganic insulation board and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
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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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- 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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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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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Abstract
The invention discloses a graphite modified polystyrene inorganic insulation board and a preparation method thereof, relates to the technical field of building insulation boards, and solves the problem that the whole application effect is greatly reduced due to the fact that two indexes of heat conductivity coefficient and compressive strength are difficult to meet on an insulation board, wherein the graphite modified polystyrene inorganic insulation board comprises the following components in parts by weight: 80-95 parts of cement; 20-35 parts of plasticizing filling material; 2-3 parts of an early strength agent; 0.8-2.5 parts of thickening agent; 4-8 parts of refractory materials; 0.8-1.5 parts of catalyst; 1-1.5 parts of an organosilicon waterproofing agent; 0.8-1.2 parts of fiber material; 11-15 parts of graphite modified polystyrene particles. The graphite modified polystyrene inorganic insulation board has excellent heat conductivity coefficient and compressive strength, can meet the current energy-saving design requirement, and has good overall applicability.
Description
Technical Field
The invention relates to the technical field of building insulation boards, in particular to a graphite modified polystyrene inorganic insulation board and a preparation method thereof.
Background
The inorganic modified non-inflammable heat-insulating plate is made up by using cement-base gel material, graphite polystyrene granules and several additives through the processes of mixing, stirring, pouring into mould, pressure-forming, natural curing or steam curing and cutting. The inorganic modified non-combustible heat-insulating board is also called an inorganic modified graphite polyphenyl board, the heat conductivity coefficient is less than or equal to 0.052, the fireproof grade A2 grade is achieved, the compressive strength of the board is greater than 0.3, the strength is high, the construction is convenient, and the inorganic modified non-combustible heat-insulating board is an excellent material for building heat insulation.
Along with the improvement of national energy-saving requirements and indexes, the performance of heat-insulating products in the industry is higher and higher. The combustion grade of the existing genuine gold plate heat preservation system is reduced from the original A grade to the B1 grade, and the cement foaming plate system basically leaves our sight. The system problem is frequent due to the water absorption problem of the rock wool board, and the heat conductivity coefficients of the foam glass board and the ceramic foam board are higher. At this appropriate time, new products with high efficiency and flame retardancy were developed.
The invention discloses a graphite extruded sheet for heat insulation and a preparation process thereof in a Chinese patent with the publication number of CN106009353A, wherein the graphite extruded sheet for heat insulation is prepared from the following raw materials in parts by weight: 6-8 parts of expanded graphite fine powder, 70-73 parts of polystyrene, 0.5-3 parts of polyvinyl alcohol, 6-8 parts of flame retardant, 3-5 parts of foaming agent, 2-3 parts of talcum powder and 0.3-1 part of calcium stearate; the preparation process comprises the following steps: (1) adding polystyrene particles, expanded graphite fine powder, a flame retardant, talcum powder, calcium stearate and polyvinyl alcohol particles into a mixing bin for mixing, uniformly mixing to form a first mixture, and performing first-order plasticization by a high-temperature screw at the plasticizing temperature of 150-; after plasticizing by the high-temperature screw, completing melting and plasticizing of the material and preliminarily mixing the material with a foaming agent; (2) performing high-temperature screw second-order mixing, and further uniformly mixing the first-order plasticized material and the foaming agent at the mixing temperature of 160-165 ℃; (3) injecting CO2 foaming agent for production under pressure, and extruding the foaming material for molding.
In the above application, the addition of polyvinyl alcohol and calcium stearate can increase the thermal stability and uniformity of the material in the high-temperature mixing process, and improve the air permeability of the material and the binding property with the bonding layer, thereby improving the service life of the external thermal insulation system of the external wall and the safety of the external thermal insulation system of the external wall, but in the actual operation process, two indexes of the thermal conductivity and the compressive strength are difficult to satisfy on one plate, so that the whole application effect is greatly reduced, especially in a special application environment, because the requirements of the thermal conductivity and the compressive strength reaching the standard cannot be satisfied, the approach to actual solution is usually brought with higher cost, and therefore, a new scheme needs to be provided to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the graphite modified polystyrene inorganic insulation board which has excellent heat conductivity coefficient and compressive strength, can meet the current energy-saving design requirement and has good overall applicability, so as to solve the technical problems.
In order to achieve the first purpose, the invention provides the following technical scheme:
a graphite modified polystyrene inorganic insulation board comprises the following components in parts by weight:
80-95 parts of cement;
20-35 parts of plasticizing filling material;
2-3 parts of an early strength agent;
0.8-2.5 parts of thickening agent;
4-8 parts of refractory materials;
0.8-1.5 parts of catalyst;
1-1.5 parts of an organosilicon waterproofing agent;
0.8-1.2 parts of fiber material;
11-15 parts of graphite modified polystyrene particles.
By adopting the technical scheme, the graphite, the foaming agent and other auxiliaries are added into the polystyrene raw material, the graphite wraps the inner wall of the foam wall to form the fireproof layer, the expandable polystyrene particle raw material is prepared, and the particles are pre-expanded by pre-expansion equipment in a factory to prepare the graphite modified polystyrene foam particles. The heat reflection effect of the graphite is utilized to reduce the original heat conductivity coefficient from the traditional 0.041W/(m.k) to 0.032W/(m.k), and the flame retardant property is superior to that of the common particles. Has the following characteristics: the fireproof performance reaches the B1-grade fire-retardant property, the heat insulation capability is stronger, and the heat conductivity coefficient is less than or equal to 0.032W/(m.K). The cement, the plasticizing filling material, the early strength agent, the thickening agent, the refractory material, the catalyst, the organic silicon waterproof agent and the fiber material are matched with each other, the closest packing can be formed, the graphite modified polystyrene inorganic insulation board with lower porosity and compact integral structure is obtained, and the graphite modified polystyrene inorganic insulation board has excellent heat conductivity coefficient and compressive strength and good integral applicability under the condition of meeting the current energy-saving design requirement.
More preferably, the graphite modified polystyrene particles are prepared according to the following steps:
s1, mixing natural rubber and graphite according to a mass ratio of 1: (3.5-4.5) modifying and synthesizing by adopting a microchannel reactor to melt the natural rubber into liquid, spraying the liquid by spraying equipment to be atomized, mixing with graphite and changing into granular synthetic substances;
s2, introducing polystyrene with the mass 2-5 times that of the granular synthesis into a microchannel reactor by using an extension pipeline, finishing the reaction at a discharge port of the microchannel reactor, directly using methanol to perform extraction and quenching, and performing melt extrusion to obtain graphite modified expandable polystyrene particles;
s3, adding 0.05-0.2 times of foaming agent into the graphite modified expandable polystyrene particles, stirring and mixing uniformly, carrying out pre-foaming treatment by using steam, and carrying out curing treatment after the particles expand to obtain the graphite modified polystyrene particles.
By adopting the technical scheme, the natural rubber is also called polyisoprene, which is a natural high molecular compound taking cis-1, 4-polyisoprene as a main component, 91-94% of the component is rubber hydrocarbon (cis-1, 4-polyisoprene), and the scheme adopts a flaky solid, the relative density is 0.94, and the elastic film amount is 2-4 MPa. The natural rubber which is melted into liquid is sprayed into mist through spraying equipment and is mixed with graphite, so that the surface energy of the graphite can be reduced, the aggregation degree of the graphite is reduced, the surface of the graphite is rich in a large amount of organic groups, the bonding strength between the graphite and polystyrene and a gel material is greatly improved, a good heat preservation and insulation effect is achieved, and the finally obtained graphite modified polystyrene inorganic heat preservation plate has more excellent compressive strength. Meanwhile, the graphite modified expandable polystyrene particles are pre-expanded, can be adjusted according to the specification requirements of different plates, and have excellent applicability as a whole.
More preferably, the diameter of the graphite modified polystyrene particle is 20-50 mm.
By adopting the technical scheme, the graphite modified polystyrene particles with the particle diameters can form a good tissue skeleton, and are matched with other raw materials, so that gaps among the particles can be well filled, and further the graphite modified polystyrene inorganic insulation board with good insulation effect, low combustion heat value, high compressive strength, good safety performance and excellent weather resistance can be obtained.
More preferably, the plasticizing filling material is any one or a mixture of more of silicon dioxide, micro silica fume and diatomite.
By adopting the technical scheme, the plasticizing filling material has good dispersibility, and has good associativity with other component raw materials, so that the graphite modified polystyrene inorganic insulation board can keep excellent compressive strength.
More preferably, the early strength agent is any one or a mixture of more of calcium formate, bauxite and triethanolamine.
By adopting the technical scheme, the early strength agent can improve the early strength of the mechanically-modified graphite modified flame-retardant heat-insulation board, avoids the generation of cracks, ensures the stability of the whole structure, has the effect of enhancing plasticization, can improve the construction efficiency and save the investment cost, and further can greatly improve the quality of the graphite modified polystyrene inorganic heat-insulation board.
More preferably, the thickening agent is any one or a mixture of more of hydroxypropyl cellulose, methyl cellulose and aluminum silicate.
By adopting the technical scheme, the thickening agent is beneficial to fully mixing raw materials of each component, has good fluidity after being mixed with water, and is convenient for subsequent processing and forming. Meanwhile, the thickening agent can also gather and settle large-particle substances on the surface, so that the stability of a mixed system is ensured, and further the graphite modified polystyrene inorganic insulation board with good quality can be obtained.
More preferably, the refractory material is any one or a mixture of more of mica powder, aluminum hydroxide and zirconia.
By adopting the technical scheme, the fireproof material has good flame retardance, can improve the high-temperature resistance, corrosion resistance and thermal vibration resistance of the graphite modified polystyrene inorganic insulation board, and has good filling and dispersing properties, so that the graphite modified polystyrene inorganic insulation board has good compressive strength.
More preferably, the catalyst is selected from one or more of polycarboxylic acid base water agent, amine base water agent, lithium carbonate and aluminum sol.
By adopting the technical scheme, the water reducing agent has a dispersing effect on cement particles, can improve the workability of the cement particles, reduces the unit water consumption, improves the fluidity of concrete mixtures, and can improve the binding force between graphite modified polystyrene particles and raw materials of each component by lithium carbonate and alumina sol, thereby improving the overall quality of the graphite modified polystyrene inorganic insulation board.
Further preferably, the fiber material is selected from any one or a mixture of more of polypropylene fiber, glass fiber and carbon fiber.
By adopting the technical scheme, the fiber material has excellent structural strength, is doped among the raw materials of each component, and can be interwoven into a reinforcing network in the graphite modified polystyrene inorganic insulation board, so that the graphite modified polystyrene inorganic insulation board has good compressive strength as a whole.
The second purpose of the invention is to provide a preparation method of the graphite modified polystyrene inorganic insulation board, the graphite modified polystyrene inorganic insulation board prepared by the method has excellent heat conductivity coefficient and compressive strength, can meet the current energy-saving design requirements, and has good overall applicability.
In order to achieve the second purpose, the invention provides the following technical scheme, and the preparation method of the graphite modified polystyrene inorganic insulation board comprises the following steps:
weighing cement, plasticizing fillers, early strength agents, thickening agents, refractory materials, catalysts, organic silicon waterproofing agents and fiber materials according to parts by weight, and uniformly mixing to obtain mixed powder;
step two, adding water accounting for 40-60% of the total weight of the powder in the step one, and carrying out secondary stirring to obtain uniform and particle-free slurry;
step three, adding the graphite modified polystyrene particles in corresponding weight parts into the slurry, and fully stirring for the third time to obtain a mixture;
step four, pressing and molding the mixture obtained in the step three through a pressing mold, wherein the compression ratio is 20-50%;
step five, placing the module obtained in the step four and the mould into a drying room at the temperature of 40-50 ℃, removing the mould after curing for 5-8h, and continuously curing at normal temperature to 7d after removing the mould;
and step six, cutting the module into the heat-insulating board with the corresponding thickness required by the project through cutting equipment according to the required size.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) the graphite modified polystyrene inorganic insulation board has the advantages that auxiliaries such as graphite and foaming agents are added into a polystyrene raw material, a fireproof layer is formed by wrapping graphite on the inner wall of a foam wall, an expandable polystyrene particle raw material is prepared, particle pre-expansion is carried out through pre-expansion equipment in a factory to prepare graphite modified polystyrene foam particles, and cement, plasticizing fillers, early strength agents, thickening agents, refractory materials, catalysts, organic silicon waterproof agents and fiber materials are matched with one another to form closest packing, so that the graphite modified polystyrene inorganic insulation board with low porosity and compact overall structure is obtained, and the graphite modified polystyrene inorganic insulation board has excellent heat conductivity coefficient and compressive strength and good overall applicability under the condition of meeting the current energy-saving design requirements;
(2) the natural rubber which is melted into liquid is sprayed into mist through spraying equipment and is mixed with graphite, so that the surface energy of the graphite can be reduced, the aggregation degree of the graphite is reduced, the surface of the graphite is rich in a large amount of organic groups, the bonding strength between the graphite and polystyrene and a gel material is greatly improved, a good heat preservation and insulation effect is achieved, and the finally obtained graphite modified polystyrene inorganic heat preservation plate has more excellent compressive strength.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: the graphite modified polystyrene inorganic insulation board comprises the components and the corresponding parts by weight shown in Table 1, and is prepared by the following steps:
weighing cement, silicon dioxide, calcium formate, hydroxypropyl cellulose, mica powder, a polycarboxylic alkali water agent, an organosilicon waterproofing agent and polypropylene fiber according to parts by weight, and uniformly mixing to obtain mixed powder;
step two, adding water accounting for 50 percent of the total weight of the powder in the step one, and stirring for the second time to obtain uniform and particle-free slurry;
step three, adding the graphite modified polystyrene particles in corresponding weight parts into the slurry, and fully stirring for the third time to obtain a mixture;
step four, pressing and molding the mixture obtained in the step three through a pressing mold, wherein the compression ratio is 35%;
placing the module obtained in the fourth step and the mould into a drying room at 45 ℃, curing for 6.5 hours, then removing the mould, and continuously curing at normal temperature to 7 days after removing the mould;
and step six, cutting the module into the heat-insulating board with the corresponding thickness required by the project through cutting equipment according to the required size.
Note: the diameter of the graphite modified polystyrene particles in the above steps is 35mm, and the graphite modified polystyrene particles are prepared according to the following steps:
s1, mixing natural rubber and graphite according to a mass ratio of 1: 4, modifying and synthesizing by adopting a microchannel reactor to melt the natural rubber into liquid, spraying the liquid into mist by spraying equipment, mixing the mist with graphite, and changing the mist into granular synthetic substances;
s2, introducing polystyrene with the mass being 3.5 times that of the granular synthesis into a microchannel reactor by using an extension pipeline, finishing the reaction at a discharge port of the microchannel reactor, directly using methanol to perform extraction and quenching, and performing melt extrusion to obtain graphite modified expandable polystyrene particles;
s3, adding 0.125 times of foaming agent into the graphite modified expandable polystyrene particles, stirring and mixing uniformly, carrying out pre-foaming treatment by using steam, and carrying out curing treatment after the particles expand to obtain the graphite modified polystyrene particles.
Example 2: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in embodiment 1 in that the graphite modified polystyrene inorganic insulation board is prepared by the following steps:
weighing cement, silicon dioxide, calcium formate, hydroxypropyl cellulose, mica powder, a polycarboxylic alkali water agent, an organosilicon waterproofing agent and polypropylene fiber according to parts by weight, and uniformly mixing to obtain mixed powder;
step two, adding water accounting for 40 percent of the total weight of the powder in the step one, and stirring for the second time to obtain uniform and particle-free slurry;
step three, adding the graphite modified polystyrene particles in corresponding weight parts into the slurry, and fully stirring for the third time to obtain a mixture;
step four, pressing and molding the mixture obtained in the step three through a pressing mold, wherein the compression ratio is 50%;
placing the module obtained in the fourth step and the mould into a drying room at 40 ℃, curing for 8 hours, then removing the mould, and continuously curing at normal temperature to 7 days after removing the mould;
and step six, cutting the module into the heat-insulating board with the corresponding thickness required by the project through cutting equipment according to the required size.
Example 3: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in embodiment 1 in that the graphite modified polystyrene inorganic insulation board is prepared by the following steps:
weighing cement, silicon dioxide, calcium formate, hydroxypropyl cellulose, mica powder, a polycarboxylic alkali water agent, an organosilicon waterproofing agent and polypropylene fiber according to parts by weight, and uniformly mixing to obtain mixed powder;
step two, adding water accounting for 60 percent of the total weight of the powder in the step one, and stirring for the second time to obtain uniform and particle-free slurry;
step three, adding the graphite modified polystyrene particles in corresponding weight parts into the slurry, and fully stirring for the third time to obtain a mixture;
step four, pressing and molding the mixture obtained in the step three through a pressing mold, wherein the compression ratio is 20%;
placing the module obtained in the fourth step and the mould into a drying room at 50 ℃, curing for 5 hours, then removing the mould, and continuously curing at normal temperature to 7 days after removing the mould;
and step six, cutting the module into the heat-insulating board with the corresponding thickness required by the project through cutting equipment according to the required size.
Examples 4 to 5: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the components and the corresponding parts by weight are shown in the table 1.
TABLE 1 Components and parts by weight of examples 1-5
Example 6: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the silica and the like in the step one are replaced by the micro silica fume.
Example 7: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the diatomite is replaced by the silica in the step one.
Example 8: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the calcium formate and the like in the step one are replaced by bauxite.
Example 9: the graphite modified polystyrene inorganic insulation board is different from the embodiment 1 in that the calcium formate and the like in the step one are replaced by triethanolamine.
Example 10: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the mass of hydroxypropyl cellulose and the like in the step one is replaced by methyl cellulose.
Example 11: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that hydroxypropyl cellulose and the like in the step one are replaced by aluminum silicate.
Example 12: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that mica powder and the like in the step one are replaced by aluminum hydroxide in quality.
Example 13: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the mica powder and the like in the step one are replaced by zirconium oxide.
Example 14: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that lithium carbonate is replaced by polycarboxylic acid alkali water agent in the step one.
Example 15: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the polycarboxylic acid alkali water agent in the step one is replaced by alumina sol in equal mass.
Example 16: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the polypropylene fibers and the like in the step one are replaced by glass fibers.
Example 17: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the polypropylene fibers and the like in the step one are replaced by carbon fibers.
Example 18: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the diameter of graphite modified polystyrene particles in the steps is 20mm, and the graphite modified polystyrene particles are prepared according to the following steps:
s1, mixing natural rubber and graphite according to a mass ratio of 1: 3.5, modifying and synthesizing by adopting a micro-channel reactor to melt the natural rubber into liquid, spraying the liquid by spraying equipment to be atomized, mixing with graphite and changing into granular synthetic substances;
s2, introducing polystyrene with 2 times of the mass of the granular synthesis into a microchannel reactor by using an extension pipeline, finishing the reaction at a discharge port of the microchannel reactor, directly using methanol for extraction and quenching, and performing melt extrusion to obtain graphite modified expandable polystyrene particles;
s3, adding 0.05 times of foaming agent into the graphite modified expandable polystyrene particles, stirring and mixing uniformly, carrying out pre-foaming treatment by using steam, and carrying out curing treatment after the particles expand to obtain the graphite modified polystyrene particles.
Example 19: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the diameter of graphite modified polystyrene particles in the steps is 50mm, and the graphite modified polystyrene particles are prepared according to the following steps:
s1, mixing natural rubber and graphite according to a mass ratio of 1: 4.5, modifying and synthesizing by adopting a micro-channel reactor to melt the natural rubber into liquid, spraying the liquid by spraying equipment to be atomized, mixing with graphite and changing into granular synthetic substances;
s2, introducing polystyrene with 5 times of the mass of the granular synthesis into a microchannel reactor by using an extension pipeline, finishing the reaction at a discharge port of the microchannel reactor, directly using methanol for extraction and quenching, and performing melt extrusion to obtain graphite modified expandable polystyrene particles;
s3, adding 0.2 times of foaming agent into the graphite modified expandable polystyrene particles, stirring and mixing uniformly, carrying out pre-foaming treatment by using steam, and carrying out curing treatment after the particles expand to obtain the graphite modified polystyrene particles.
Comparative example 1: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in embodiment 1 in that the inorganic composite non-combustible insulation board obtained in embodiment 1 in the Chinese invention patent application with the publication number of CN110451900A is selected.
Comparative example 2: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the polystyrene insulation board body obtained in the embodiment 1 in the Chinese invention patent application with the publication number of CN108912521A is selected.
Comparative example 3: the graphite modified polystyrene inorganic insulation board is different from the graphite modified polystyrene inorganic insulation board in the embodiment 1 in that the graphite modified polystyrene inorganic insulation board obtained in the embodiment 1 in the Chinese invention patent application with the publication number of CN110283398A is selected.
Performance testing
Test samples: the graphite modified polystyrene inorganic insulation boards obtained in examples 1 to 19 were used as test samples 1 to 19, and the graphite modified polystyrene inorganic insulation boards obtained in comparative examples 1 to 3 were used as control samples 1 to 3.
The test method comprises the following steps: the details of the test methods and criteria are shown in Table 2.
TABLE 2 test methods and guidelines
And (3) test results: the test results of the test samples 1 to 19 and the control samples 1 to 3 are shown in Table 3. As can be seen from Table 3, the graphite modified polystyrene inorganic insulation board in the application of the invention has excellent thermal conductivity and compressive strength by comparing the test results of the test samples 1-5 and the comparison samples 1-3, has stable overall performance compared with the prior art, can simultaneously meet the requirement that the thermal conductivity and the compressive strength reach the standard, and has good overall application effect. The comparison of the test results of the test samples 6-19 and the test sample 1 can be obtained, the plasticizing filling material, the early strength agent, the thickening agent, the refractory material, the catalyst and the fiber material disclosed by the invention are all suitable for preparing the graphite modified polystyrene inorganic insulation board, and the obtained graphite modified polystyrene inorganic insulation board has good and excellent quality.
TABLE 3 test results of test samples 1-19 and control samples 1-3
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The graphite modified polystyrene inorganic insulation board is characterized by comprising the following components in parts by weight:
80-95 parts of cement;
20-35 parts of plasticizing filling material;
2-3 parts of an early strength agent;
0.8-2.5 parts of thickening agent;
4-8 parts of refractory materials;
0.8-1.5 parts of catalyst;
1-1.5 parts of an organosilicon waterproofing agent;
0.8-1.2 parts of fiber material;
11-15 parts of graphite modified polystyrene particles.
2. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the graphite modified polystyrene particles are prepared according to the following steps:
s1, mixing natural rubber and graphite according to a mass ratio of 1: (3.5-4.5) modifying and synthesizing by adopting a microchannel reactor to melt the natural rubber into liquid, spraying the liquid by spraying equipment to be atomized, mixing with graphite and changing into granular synthetic substances;
s2, introducing polystyrene with the mass 2-5 times that of the granular synthesis into a microchannel reactor by using an extension pipeline, finishing the reaction at a discharge port of the microchannel reactor, directly using methanol to perform extraction and quenching, and performing melt extrusion to obtain graphite modified expandable polystyrene particles;
s3, adding 0.05-0.2 times of foaming agent into the graphite modified expandable polystyrene particles, stirring and mixing uniformly, carrying out pre-foaming treatment by using steam, and carrying out curing treatment after the particles expand to obtain the graphite modified polystyrene particles.
3. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the diameter of the graphite modified polystyrene particles is 20-50 mm.
4. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the plasticizing filler is selected from any one or a mixture of more of silicon dioxide, micro silica fume and diatomite.
5. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the early strength agent is any one or a mixture of more of calcium formate, bauxite and triethanolamine.
6. The inorganic insulation board of graphite modified polystyrene as claimed in claim 1, wherein the thickener is any one or more of hydroxypropyl cellulose, methyl cellulose and aluminum silicate.
7. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the refractory material is any one or a mixture of mica powder, aluminum hydroxide and zirconia.
8. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the catalyst is selected from any one or a mixture of a polycarboxylic acid alkali water agent, an amine alkali water agent, lithium carbonate and aluminum sol.
9. The graphite modified polystyrene inorganic insulation board according to claim 1, wherein the fiber material is any one or a mixture of polypropylene fiber, glass fiber and carbon fiber.
10. The preparation method of the graphite modified polystyrene inorganic insulation board as claimed in claim 1, characterized by comprising the following steps:
weighing cement, plasticizing fillers, early strength agents, thickening agents, refractory materials, catalysts, organic silicon waterproofing agents and fiber materials according to parts by weight, and uniformly mixing to obtain mixed powder;
step two, adding water accounting for 40-60% of the total weight of the powder in the step one, and carrying out secondary stirring to obtain uniform and particle-free slurry;
step three, adding the graphite modified polystyrene particles in corresponding weight parts into the slurry, and fully stirring for the third time to obtain a mixture;
step four, pressing and molding the mixture obtained in the step three through a pressing mold, wherein the compression ratio is 20-50%;
step five, placing the module obtained in the step four and the mould into a drying room at the temperature of 40-50 ℃, removing the mould after curing for 5-8h, and continuously curing at normal temperature to 7d after removing the mould;
and step six, cutting the module into the heat-insulating board with the corresponding thickness required by the project through cutting equipment according to the required size.
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