CN114083669A - Steel wire mesh rack insulation board and preparation method thereof - Google Patents
Steel wire mesh rack insulation board and preparation method thereof Download PDFInfo
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- CN114083669A CN114083669A CN202111398148.1A CN202111398148A CN114083669A CN 114083669 A CN114083669 A CN 114083669A CN 202111398148 A CN202111398148 A CN 202111398148A CN 114083669 A CN114083669 A CN 114083669A
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- polystyrene
- steel wire
- wire mesh
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- board
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000010959 steel Substances 0.000 title claims abstract description 118
- 238000002360 preparation method Methods 0.000 title claims abstract description 52
- 238000009413 insulation Methods 0.000 title claims abstract description 43
- 239000004793 Polystyrene Substances 0.000 claims abstract description 156
- 229920002223 polystyrene Polymers 0.000 claims abstract description 156
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 31
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 30
- 229920006248 expandable polystyrene Polymers 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 30
- 239000004568 cement Substances 0.000 claims description 29
- 239000000835 fiber Substances 0.000 claims description 29
- 238000000465 moulding Methods 0.000 claims description 29
- 239000003094 microcapsule Substances 0.000 claims description 27
- 238000005187 foaming Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 239000004088 foaming agent Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 18
- 239000005543 nano-size silicon particle Substances 0.000 claims description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims description 14
- 238000001764 infiltration Methods 0.000 claims description 13
- 230000008595 infiltration Effects 0.000 claims description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 12
- 239000002775 capsule Substances 0.000 claims description 12
- 229920005990 polystyrene resin Polymers 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000007580 dry-mixing Methods 0.000 claims description 4
- 238000009987 spinning Methods 0.000 description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 238000010041 electrostatic spinning Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 239000011398 Portland cement Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000007723 die pressing method Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0046—Machines or methods for applying the material to surfaces to form a permanent layer thereon to plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
-
- 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
- Y02A30/242—Slab shaped vacuum 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
Abstract
The invention discloses a steel wire mesh rack insulation board and a preparation method thereof. The steel wire mesh rack insulation board is a prefabricated product, and is stable in quality, high in strength and good in insulation performance. The main structure of the polystyrene board is the steel wire mesh frame polystyrene board, and the steel wire mesh frame is introduced into the polystyrene board when the polystyrene board is prepared, so that the insulation board has high mechanical strength and does not influence the insulation performance of the polystyrene board.
Description
Technical Field
The invention relates to insulation board processing, in particular to a steel wire mesh rack insulation board and a preparation method thereof. Belongs to the technical field of building construction.
Background
The building heat-insulating material is an indispensable part of modern building construction, and the use of the building heat-insulating material is beneficial to the control of indoor environment temperature, meets the current requirements of green and energy conservation, and has very important significance.
The construction effect of the building heat-insulating material is very critical because the building heat-insulating material is exposed outside for a long time. At present, a common construction method of the building thermal insulation material is field plastering wet operation, the construction method is influenced by the technical level of constructors and environmental factors, the final construction quality is difficult to ensure, cracking and water seepage phenomena can occur, and the construction cost is higher.
The polystyrene heat-insulating board is the most common building heat-insulating material at present, and plays a reinforcing role through the alkali-resistant glass fiber mesh cloth, wherein the polystyrene part is attached to the alkali-resistant glass fiber mesh cloth part through plastering mortar or bonding mortar. The existing polystyrene insulation board has the problems of poor strength, poor heat insulation property and the like.
Patent application CN103541447A discloses a steel wire net frame polystyrene insulation board comprises heat preservation and enhancement layer, and the heat preservation is polystyrene insulation board, and the enhancement layer is the steel wire net, and the steel wire net erects directly over the one side of polystyrene insulation board through a plurality of support steel wires, supports steel wire one end around connecting on the steel wire net and leaving out the head, and the other end is inserted in polystyrene insulation board to one side. The patent technology has a certain improvement on the performance of the insulation board, but is still not ideal enough.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the steel wire mesh rack insulation board and the preparation method thereof, and the steel wire mesh rack insulation board is high in strength and good in insulation performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a steel wire mesh frame insulation board comprises the steps of firstly, manufacturing a steel wire mesh frame polystyrene board by using steel wire mesh sheets and expandable polystyrene as raw materials, and then pouring two sides of the steel wire mesh frame polystyrene board to form concrete layers to obtain the steel wire mesh frame insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, dry-mixing and uniformly mixing cement, fly ash, slag powder, coarse aggregate, fine aggregate, polystyrene fiber and polystyrene microcapsule, then adding a water reducing agent and water while stirring, uniformly mixing, adding a cement foaming agent, and uniformly stirring to obtain a prefabricated slurry, wherein the prefabricated slurry can be prepared and used after being prepared;
(2) then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form a concrete layer;
the polystyrene fiber is prepared by taking polystyrene resin and nano silicon dioxide as raw materials, the polystyrene microcapsule is prepared by taking anhydrous sodium silicate as a capsule core, and polystyrene is used as a capsule wall.
Preferably, the thickness of the steel wire mesh frame polystyrene plate is 25-35 mm, and the thickness of the concrete layer is 10-12 mm.
Preferably, the preparation method of the steel wire mesh sheet comprises the following steps: the steel wires are vertically and horizontally staggered to form a steel wire mesh with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 1.8-2 mm.
Preferably, the preparation method of the steel wire mesh frame polystyrene board comprises the following steps in parts by weight:
(A) firstly, extruding 100 parts of polystyrene resin, and adding 3-4 parts of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
Further preferably, in the step (B), the expandable polystyrene is pretreated before being fed into the molding press by a specific method comprising: treating the mixture in a steam pre-foaming machine for 55 to 65 minutes under the conditions that the water vapor pressure is 0.1 to 0.2MPa and the temperature is 94 to 96 ℃.
Further preferably, in the step (B), the process conditions of the die pressing are as follows: treating for 20-30 s under the conditions of 0.1-0.2 MPa and 92-95 ℃.
Preferably, in the step (1), the mass ratio of cement, fly ash, slag powder, coarse aggregate, fine aggregate, polystyrene fiber, polystyrene microcapsule, water reducing agent, water and cement foaming agent is 290-310: 110-120: 120-130: 620-660: 360-380: 8-10: 4-6: 8-10: 140-150: 13 to 15.
More preferably, the cement is P.O 42.5.5 Portland cement, the coarse aggregate is crushed stone with the particle size of 12-15 mm, the fine aggregate is medium sand with the fineness modulus of 2.5-3.0, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the cement foaming agent is purchased from the Kyowa Denxu trade Co., Ltd., model DX-550, and the cement foaming agent is prepared into foam liquid by a foaming machine and then is fed.
Preferably, in the step (1), the process conditions for stirring and uniformly mixing are as follows: stirring for 200-250 s at 2.5-3.5 m/s.
Preferably, in the step (2), the preparation method of the pretreated polystyrene board is as follows: and injecting carbon dioxide into the steel wire mesh frame polystyrene board by adopting static mixed gas at the pressure of 3.5-4.5 MPa, wherein the processing time is 20-30 s, so that foaming processing is realized.
Preferably, in the step (2), the vacuum infiltration is performed by the following specific method: pumping for 40-50 s under the condition that the vacuum degree is-0.05-0.08 MPa.
Preferably, in the step (2), the drying process conditions are as follows: drying for 5-6 days at 20-25 ℃.
Preferably, the preparation method of the polystyrene fiber comprises the following steps in parts by weight: firstly, 0.5-0.7 part of nano silicon dioxide is added into 4-4.5 parts of gamma-aminopropyl trimethoxy silane petroleum ether solution with the mass concentration of 8-10%, stirred for 20-22 hours at room temperature and steamed in a rotating mode to obtain modified nano silicon dioxide; then adding the modified nano-silica into 85-90 parts of a 35-45 mass% polystyrene tetrahydrofuran solution, and carrying out ultrasonic oscillation treatment for 5-6 hours at 300-400W to obtain a spinning solution; and finally, carrying out electrostatic spinning on the spinning solution to obtain the polystyrene fiber.
Further preferably, the spinning voltage of electrostatic spinning is 20-25 kV, the receiving distance is 15-25 cm, and the diameter of the polystyrene fiber is 80-100 nm.
Preferably, the preparation method of the polystyrene microcapsule is as follows: dispersing 5-7 parts of polystyrene in 30-35 parts of dichloromethane by ultrasonic waves, adding 1-2 parts of anhydrous sodium silicate, stirring and mixing uniformly, sealing, heating to volatilize the dichloromethane while continuously introducing ethanol gas, wherein the heating temperature is 40-50 ℃, the heating time is 15-20 minutes, heating to obtain a solid after the heating treatment is finished, and crushing to obtain the polystyrene microcapsule.
The steel wire mesh rack insulation board is obtained by the preparation method.
The invention has the beneficial effects that:
the steel wire mesh rack insulation board is obtained by firstly manufacturing steel wire mesh sheets and expandable polystyrene into a steel wire mesh rack polystyrene board, and then pouring concrete layers on two sides of the steel wire mesh rack polystyrene board. The steel wire mesh rack insulation board is a prefabricated product, and is stable in quality, high in strength and good in insulation performance.
The main structure of the polystyrene board is the steel wire mesh frame polystyrene board, and the steel wire mesh frame is introduced into the polystyrene board when the polystyrene board is prepared, so that the insulation board has high mechanical strength and does not influence the insulation performance of the polystyrene board.
One of the technical keys of the invention is a concrete layer, and the preparation method comprises the following steps: firstly, dry-mixing and uniformly mixing cement, fly ash, slag powder, coarse aggregate, fine aggregate, polystyrene fiber and polystyrene microcapsule, adding a water reducing agent and water while stirring, uniformly mixing, adding a cement foaming agent, and uniformly stirring to obtain a prefabricated slurry, wherein the prefabricated slurry is ready to use after being prepared; and then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form the concrete layer. Polystyrene fiber and polystyrene microcapsules are added during preparation of the concrete layer, so that the concrete layer has good compatibility with a steel wire mesh frame polystyrene board, and the strength and the heat preservation performance are ensured.
The polystyrene fiber is prepared by taking polystyrene resin and nano-silica as raw materials, and the introduction of the nano-silica plays a role in reinforcement; the polystyrene microcapsule is prepared by using anhydrous sodium silicate as a capsule core and polystyrene as a capsule wall, and is beneficial to adjusting the pore structure of concrete, ensuring the strength and improving the heat-insulating property.
Detailed Description
The present invention will be further illustrated by the following examples, which are intended to be merely illustrative and not limitative.
Example 1:
a preparation method of a steel wire mesh frame insulation board comprises the steps of firstly, manufacturing a steel wire mesh frame polystyrene board by using steel wire mesh sheets and expandable polystyrene as raw materials, and then pouring two sides of the steel wire mesh frame polystyrene board to form concrete layers to obtain the steel wire mesh frame insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, 290kg of cement, 120kg of fly ash, 120kg of slag powder, 660kg of coarse aggregate, 360kg of fine aggregate, 10kg of polystyrene fiber and 4kg of polystyrene microcapsule are dry-mixed and uniformly mixed, then 10kg of water reducing agent and 140kg of water are added while stirring, the mixture is uniformly mixed, 15kg of cement foaming agent is added, and the mixture is uniformly stirred to obtain prefabricated slurry which is ready to use after being prepared;
(2) then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, then uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form a concrete layer;
the polystyrene fiber is prepared by taking polystyrene resin and nano silicon dioxide as raw materials, the polystyrene microcapsule is prepared by taking anhydrous sodium silicate as a capsule core, and polystyrene is used as a capsule wall.
The thickness of the steel wire mesh frame polystyrene plate is 25mm, and the thickness of the concrete layer is 12 mm.
The preparation method of the steel wire mesh sheet comprises the following steps: the steel wires are vertically and horizontally staggered to form a steel wire mesh with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 1.8 mm.
The preparation method of the steel wire mesh frame polystyrene board comprises the following steps:
(A) firstly, extruding 100kg of polystyrene resin, and adding 4kg of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
In the step (B), the expandable polystyrene is pretreated before being sent into a molding press, and the specific method comprises the following steps: treating in a steam pre-foaming machine for 55 minutes under the conditions that the water vapor pressure is 0.1MPa and the temperature is 96 ℃.
In the step (B), the process conditions of the die pressing are as follows: treating at 0.2MPa and 92 deg.C for 30 s.
In the step (1), the cement is P.O 42.5.5 portland cement, the coarse aggregate is broken stone with the particle size of 12mm, the fine aggregate is medium sand with the fineness modulus of 3.0, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the cement foaming agent is purchased from Desxu Limited company, Guangzhou, model DX-550, and the foaming agent is prepared into foam liquid by a foaming machine and then is fed.
In the step (1), the process conditions for stirring and uniformly mixing are as follows: 2.5m/s stirring for 250 s.
In the step (2), the preparation method of the pretreated polystyrene board comprises the following steps: and injecting carbon dioxide into the steel wire mesh frame polystyrene board at the pressure of 3.5MPa by using static mixed gas, wherein the processing time is 30s, so that foaming processing is realized.
In the step (2), the specific method of vacuum infiltration is as follows: pumping under the vacuum degree of-0.05 MPa for 50 s.
In the step (2), the drying process conditions are as follows: drying at 20 deg.C for 6 days.
The preparation method of the polystyrene fiber comprises the following steps: firstly, 0.5kg of nano silicon dioxide is added into 4.5kg of gamma-aminopropyl trimethoxy silane petroleum ether solution with the mass concentration of 8 percent, stirred for 22 hours at room temperature and steamed in a rotating way to obtain modified nano silicon dioxide; then adding the modified nano-silica into 85kg of a 45% polystyrene tetrahydrofuran solution by mass concentration, and carrying out ultrasonic oscillation treatment at 300W for 6 hours to obtain a spinning solution; and finally, carrying out electrostatic spinning on the spinning solution to obtain the polystyrene fiber.
The spinning voltage of the electrostatic spinning was 20kV, the take-up distance was 25cm, and the diameter of the polystyrene fiber was 80 nm.
The preparation method of the polystyrene microcapsule comprises the following steps: firstly, dispersing 7kg of polystyrene in 30kg of dichloromethane by ultrasonic waves, then adding 2kg of anhydrous sodium silicate, uniformly stirring, sealing, heating to volatilize the dichloromethane while continuously introducing ethanol gas, wherein the heating temperature is 40 ℃, the heating time is 20 minutes, obtaining a solid after the heating treatment is finished, and crushing to obtain the polystyrene microcapsule.
Example 2:
a preparation method of a steel wire mesh frame insulation board comprises the steps of firstly, manufacturing a steel wire mesh frame polystyrene board by using steel wire mesh sheets and expandable polystyrene as raw materials, and then pouring two sides of the steel wire mesh frame polystyrene board to form concrete layers to obtain the steel wire mesh frame insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, uniformly mixing 310kg of cement, 110kg of fly ash, 130kg of slag powder, 620kg of coarse aggregate, 380kg of fine aggregate, 8kg of polystyrene fiber and 6kg of polystyrene microcapsule in a dry mode, adding 8kg of water reducing agent and 150kg of water while stirring, uniformly mixing, adding 13kg of cement foaming agent, and uniformly stirring to obtain prefabricated slurry, wherein the prefabricated slurry is ready to use after being prepared;
(2) then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, then uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form a concrete layer;
the polystyrene fiber is prepared by taking polystyrene resin and nano silicon dioxide as raw materials, the polystyrene microcapsule is prepared by taking anhydrous sodium silicate as a capsule core, and polystyrene is used as a capsule wall.
The thickness of the steel wire mesh frame polystyrene plate is 35mm, and the thickness of the concrete layer is 10 mm.
The preparation method of the steel wire mesh sheet comprises the following steps: the steel wires are vertically and horizontally staggered to form a steel wire mesh with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 2 mm.
The preparation method of the steel wire mesh frame polystyrene board comprises the following steps:
(A) firstly, extruding 100kg of polystyrene resin, and adding 3kg of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
In the step (B), the expandable polystyrene is pretreated before being sent into a molding press, and the specific method comprises the following steps: treating in a steam pre-foaming machine for 65 minutes under the conditions that the water vapor pressure is 0.2MPa and the temperature is 94 ℃.
In the step (B), the process conditions of the die pressing are as follows: treating at 0.1MPa and 95 deg.C for 20 s.
In the step (1), the cement is P.O 42.5.5 Portland cement, the coarse aggregate is crushed stone with the particle size of 15mm, the fine aggregate is medium sand with the fineness modulus of 2.5, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the cement foaming agent is purchased from Desxu trade of Guangzhou, model DX-550, and the foaming agent is prepared into foam liquid by a foaming machine and then is fed.
In the step (1), the process conditions for stirring and uniformly mixing are as follows: 3.5m/s stirring for 200 s.
In the step (2), the preparation method of the pretreated polystyrene board comprises the following steps: and injecting carbon dioxide into the steel wire mesh frame polystyrene board at the pressure of 4.5MPa by using static mixed gas, wherein the processing time is 20s, so that foaming processing is realized.
In the step (2), the specific method of vacuum infiltration is as follows: pumping for 40s under the vacuum degree of-0.08 MPa.
In the step (2), the drying process conditions are as follows: drying at 25 deg.C for 5 days.
The preparation method of the polystyrene fiber comprises the following steps: firstly, 0.7kg of nano silicon dioxide is added into 4kg of gamma-aminopropyl trimethoxy silane petroleum ether solution with the mass concentration of 10 percent, stirred for 20 hours at room temperature and steamed in a rotating way to obtain modified nano silicon dioxide; then adding the modified nano silicon dioxide into 90kg of a polystyrene tetrahydrofuran solution with the mass concentration of 35%, and carrying out 400W ultrasonic oscillation treatment for 5 hours to obtain a spinning solution; and finally, carrying out electrostatic spinning on the spinning solution to obtain the polystyrene fiber.
The spinning voltage of the electrostatic spinning was 25kV, the take-up distance was 15cm, and the diameter of the polystyrene fiber was 100 nm.
The preparation method of the polystyrene microcapsule comprises the following steps: firstly, dispersing 5kg of polystyrene in 35kg of dichloromethane by ultrasonic waves, then adding 1kg of anhydrous sodium silicate, uniformly stirring, sealing, heating to volatilize the dichloromethane while continuously introducing ethanol gas, wherein the heating temperature is 50 ℃, the heating time is 15 minutes, obtaining a solid after the heating treatment is finished, and crushing to obtain the polystyrene microcapsule.
Example 3:
a preparation method of a steel wire mesh frame insulation board comprises the steps of firstly, manufacturing a steel wire mesh frame polystyrene board by using steel wire mesh sheets and expandable polystyrene as raw materials, and then pouring two sides of the steel wire mesh frame polystyrene board to form concrete layers to obtain the steel wire mesh frame insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, uniformly mixing 300kg of cement, 115kg of fly ash, 125kg of slag powder, 650kg of coarse aggregate, 370kg of fine aggregate, 9kg of polystyrene fiber and 5kg of polystyrene microcapsule in a dry manner, adding 9kg of water reducing agent and 145kg of water while stirring, uniformly mixing, adding 14kg of cement foaming agent, and uniformly stirring to obtain prefabricated slurry, wherein the prefabricated slurry can be prepared and used immediately;
(2) then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, then uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form a concrete layer;
the polystyrene fiber is prepared from polystyrene resin and nano silicon dioxide as raw materials, the polystyrene microcapsule is prepared by taking anhydrous sodium silicate as a capsule core, and the polystyrene is used as a capsule wall.
The thickness of the steel wire mesh frame polystyrene plate is 30mm, and the thickness of the concrete layer is 11 mm.
The preparation method of the steel wire mesh sheet comprises the following steps: the steel wires are vertically and horizontally staggered to form a steel wire mesh with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 1.9 mm.
The preparation method of the steel wire mesh frame polystyrene board comprises the following steps:
(A) firstly, extruding 100kg of polystyrene resin, and adding 3.5kg of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
In the step (B), the expandable polystyrene is pretreated before being sent into a molding press, and the specific method comprises the following steps: treating for 60 minutes in a steam pre-foaming machine under the conditions that the water vapor pressure is 0.2MPa and the temperature is 95 ℃.
In the step (B), the process conditions of the die pressing are as follows: treating at 0.2MPa and 93 deg.C for 25 s.
In the step (1), the cement is P.O 42.5.5 Portland cement, the coarse aggregate is crushed stone with the particle size of 13mm, the fine aggregate is medium sand with the fineness modulus of 3.0, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the cement foaming agent is purchased from Desxu trade of Guangzhou, model DX-550, and the foaming agent is prepared into foam liquid by a foaming machine and then is fed.
In the step (1), the process conditions for stirring and uniformly mixing are as follows: stirring at 3m/s for 220 s.
In the step (2), the preparation method of the pretreated polystyrene board comprises the following steps: and injecting carbon dioxide into the steel wire mesh frame polystyrene board at the pressure of 4MPa by using static mixed gas, wherein the processing time is 25s, so that foaming processing is realized.
In the step (2), the specific method of vacuum infiltration is as follows: pumping for 45s under the vacuum degree of-0.06 MPa.
In the step (2), the drying process conditions are as follows: drying at 22 deg.C for 6 days.
The preparation method of the polystyrene fiber comprises the following steps: firstly, 0.6kg of nano silicon dioxide is added into 4.2kg of gamma-aminopropyl trimethoxy silane petroleum ether solution with the mass concentration of 9 percent, stirred for 21 hours at room temperature and steamed in a rotating way to obtain modified nano silicon dioxide; then adding the modified nano-silica into 88kg of a polystyrene tetrahydrofuran solution with the mass concentration of 40%, and carrying out 400W ultrasonic oscillation treatment for 5.5 hours to obtain a spinning solution; and finally, carrying out electrostatic spinning on the spinning solution to obtain the polystyrene fiber.
The spinning voltage of the electrospinning was 22kV, the receiving distance was 20cm, and the diameter of the polystyrene fiber was 90 nm.
The preparation method of the polystyrene microcapsule comprises the following steps: firstly, dispersing 6kg of polystyrene in 33kg of dichloromethane by ultrasonic waves, then adding 1.5kg of anhydrous sodium silicate, uniformly stirring and mixing, sealing, heating to volatilize the dichloromethane while continuously introducing ethanol gas, wherein the heating temperature is 45 ℃, the heating time is 18 minutes, obtaining a solid after the heating treatment is finished, and crushing to obtain the polystyrene microcapsule.
Comparative example
A preparation method of a steel wire mesh frame insulation board comprises the steps of firstly, manufacturing a steel wire mesh frame polystyrene board by using steel wire mesh sheets and expandable polystyrene as raw materials, and then pouring two sides of the steel wire mesh frame polystyrene board to form concrete layers to obtain the steel wire mesh frame insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, uniformly dry-mixing 290kg of cement, 120kg of fly ash, 120kg of slag powder, 660kg of coarse aggregate and 360kg of fine aggregate, adding 10kg of water reducing agent and 140kg of water while stirring, uniformly mixing, adding 15kg of cement foaming agent, and uniformly stirring to obtain prefabricated slurry, wherein the prefabricated slurry can be prepared and used immediately;
(2) and then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form the concrete layer.
The thickness of the steel wire mesh frame polystyrene plate is 25mm, and the thickness of the concrete layer is 12 mm.
The preparation method of the steel wire mesh sheet comprises the following steps: the steel wires are vertically and horizontally staggered to form a steel wire mesh sheet with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 1.8 mm.
The preparation method of the steel wire mesh frame polystyrene board comprises the following steps:
(A) firstly, extruding 100kg of polystyrene resin, and adding 4kg of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
In the step (B), the expandable polystyrene is pretreated before being sent into a molding press, and the specific method comprises the following steps: in a steam pre-foaming machine, the mixture is treated for 55 minutes under the conditions that the steam pressure is 0.1MPa and the temperature is 96 ℃.
In the step (B), the process conditions of the die pressing are as follows: treating at 0.2MPa and 92 deg.C for 30 s.
In the step (1), the cement is P.O 42.5.5 Portland cement, the coarse aggregate is crushed stone with the particle size of 12mm, the fine aggregate is medium sand with the fineness modulus of 3.0, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, the cement foaming agent is purchased from Desxu trade of Guangzhou, model DX-550, and the foaming agent is prepared into foam liquid by a foaming machine and then is fed.
In the step (1), the process conditions for stirring and uniformly mixing are as follows: 2.5m/s stirring for 250 s.
In the step (2), the preparation method of the pretreated polystyrene board comprises the following steps: and injecting carbon dioxide into the steel wire mesh frame polystyrene board at the pressure of 3.5MPa by using static mixed gas, wherein the processing time is 30s, so that foaming processing is realized.
In the step (2), the specific method of vacuum infiltration is as follows: pumping under the vacuum degree of-0.05 MPa for 50 s.
In the step (2), the drying process conditions are as follows: drying at 20 deg.C for 6 days.
Test examples
The performance of the insulation boards obtained in examples 1-3 and the comparative example was tested, and the results are shown in table 1.
Wherein, the thermal resistance detection refers to GB/T10294-2008, the tensile strength (drying) refers to JGJ 144-2004 appendix A, and the compression performance (MPa, deformation 10%).
TABLE 1 test results of the insulation board properties
As can be seen from Table 1, the heat insulation boards obtained in the embodiments 1-3 have high thermal resistance, high tensile strength and high compression performance, which shows that the heat insulation boards have good strength and heat insulation performance.
The polystyrene fiber and the polystyrene microcapsule are omitted in the preparation of the concrete layer, and the strength and the heat preservation performance of the obtained heat preservation plate are obviously poor, so that the polystyrene fiber and the polystyrene microcapsule are beneficial to improving the compatibility of the concrete layer and a steel wire mesh frame polystyrene plate, and further improving the strength and the heat preservation performance of the product.
Although the present invention has been described with reference to the specific embodiments, it is not intended to limit the scope of the present invention, and various modifications and variations can be made by those skilled in the art without inventive changes based on the technical solution of the present invention.
Claims (10)
1. A preparation method of a steel wire mesh rack insulation board is characterized in that a steel wire mesh rack polystyrene board is made of steel wire mesh sheets and expandable polystyrene, and concrete layers are formed on two sides of the steel wire mesh rack polystyrene board in a pouring mode to obtain the steel wire mesh rack insulation board; the preparation method of the concrete layer comprises the following steps:
(1) firstly, dry-mixing and uniformly mixing cement, fly ash, slag powder, coarse aggregate, fine aggregate, polystyrene fiber and polystyrene microcapsule, adding a water reducing agent and water while stirring, uniformly mixing, adding a cement foaming agent, and uniformly stirring to obtain a prefabricated slurry, wherein the prefabricated slurry is ready to use after being prepared;
(2) then, carrying out foaming treatment on the steel wire mesh frame polystyrene board to obtain a pretreated polystyrene board, then uniformly coating a layer of prefabricated slurry on two sides of the polystyrene board, and carrying out vacuum infiltration and drying to form a concrete layer;
the polystyrene fiber is prepared from polystyrene resin and nano silicon dioxide as raw materials, the polystyrene microcapsule is prepared by taking anhydrous sodium silicate as a capsule core, and the polystyrene is used as a capsule wall.
2. The preparation method according to claim 1, wherein the steel wire mesh frame polystyrene plate is 25-35 mm thick, and the concrete layer is 10-12 mm thick.
3. The preparation method of claim 1, wherein the preparation method of the steel wire mesh sheet is as follows: the steel wires are vertically and horizontally staggered to form a steel wire mesh with the mesh size of 3cm multiplied by 3cm, wherein the diameter of the steel wires is 1.8-2 mm.
4. The preparation method of the steel wire mesh-frame polystyrene board according to claim 1, wherein the steel wire mesh-frame polystyrene board is prepared by the following steps of:
(A) firstly, extruding 100 parts of polystyrene resin, and adding 3-4 parts of n-pentane in the extrusion process to obtain expandable polystyrene;
(B) and then fixing the steel wire mesh in the middle of a molding press, feeding expandable polystyrene into the molding press through compressed air, filling the molding press with the expandable polystyrene, and molding to obtain the steel wire mesh frame polystyrene board.
5. The preparation method according to claim 1, wherein in the step (1), the mass ratio of cement, fly ash, slag powder, coarse aggregate, fine aggregate, polystyrene fiber, polystyrene microcapsule, water reducing agent, water and cement foaming agent is 290-310: 110-120: 120-130: 620-660: 360-380: 8-10: 4-6: 8-10: 140-150: 13 to 15.
6. The preparation method according to claim 1, wherein in the step (1), the process conditions for stirring and uniformly mixing are as follows: stirring for 200-250 s at 2.5-3.5 m/s.
7. The method according to claim 1, wherein the pretreated polystyrene board is prepared in step (2) by the following method: and injecting carbon dioxide into the steel wire mesh frame polystyrene board by adopting static mixed gas at the pressure of 3.5-4.5 MPa, wherein the treatment time is 20-30 s, so that the foaming treatment is realized.
8. The preparation method according to claim 1, wherein in the step (2), the vacuum infiltration is performed by the following specific method: pumping for 40-50 s under the condition that the vacuum degree is-0.05-0.08 MPa.
9. The method of claim 1, wherein the polystyrene microcapsule is prepared by the following steps: dispersing 5-7 parts of polystyrene in 30-35 parts of dichloromethane by ultrasonic waves, adding 1-2 parts of anhydrous sodium silicate, stirring and uniformly mixing, sealing, heating to volatilize the dichloromethane while continuously introducing ethanol gas, wherein the heating temperature is 40-50 ℃, the heating time is 15-20 minutes, heating to obtain a solid after heating treatment, and crushing to obtain the polystyrene microcapsule.
10. A steel wire mesh rack insulation board obtained by the preparation method of any one of claims 1-9.
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