CN113896470B - Cement-based thin felt for composite board and production process thereof - Google Patents
Cement-based thin felt for composite board and production process thereof Download PDFInfo
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- CN113896470B CN113896470B CN202111431071.3A CN202111431071A CN113896470B CN 113896470 B CN113896470 B CN 113896470B CN 202111431071 A CN202111431071 A CN 202111431071A CN 113896470 B CN113896470 B CN 113896470B
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- 239000004568 cement Substances 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000839 emulsion Substances 0.000 claims abstract description 30
- 239000003365 glass fiber Substances 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 230000003487 anti-permeability effect Effects 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 22
- 229910021389 graphene Inorganic materials 0.000 claims description 20
- 229920002748 Basalt fiber Polymers 0.000 claims description 19
- 239000006185 dispersion Substances 0.000 claims description 19
- UITKHKNFVCYWNG-UHFFFAOYSA-N 4-(3,4-dicarboxybenzoyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 UITKHKNFVCYWNG-UHFFFAOYSA-N 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000012295 chemical reaction liquid Substances 0.000 claims description 14
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000005457 ice water Substances 0.000 claims description 5
- 238000002386 leaching Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 241001474374 Blennius Species 0.000 claims description 2
- 108010010803 Gelatin Proteins 0.000 claims description 2
- 239000000499 gel Substances 0.000 claims description 2
- 239000008273 gelatin Substances 0.000 claims description 2
- 229920000159 gelatin Polymers 0.000 claims description 2
- 235000019322 gelatine Nutrition 0.000 claims description 2
- 235000011852 gelatine desserts Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002687 intercalation Effects 0.000 abstract description 2
- 238000009830 intercalation Methods 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract 2
- 239000010439 graphite Substances 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 238000007792 addition Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a cement-based thin felt for a composite board, which comprises a glass fiber felt and slurry coated on two surfaces of the glass fiber felt, wherein the slurry comprises the following raw materials in parts by weight: 15-35 parts of cement, 10-20 parts of reinforcing fiber, 10-25 parts of barium sulfate, 15-26 parts of acrylic emulsion, 0.1-0.5 part of thickening agent, 0.5-1 part of anti-permeability agent and 10-20 parts of water; the carboxyl of amic acid can carry out dehydration condensation with the hydroxyl on graphite oxide surface in the reinforcing fiber preparation process, forms stable intercalation structure to compound emulsion can form the membrane at the fibre surface, and the graphite oxide of adding forms protruding particle, increases the roughness on fibre surface, can increase the mechanical riveting effect between fibre and the base member, improves cohesive strength, solves the bonding strength and crosses low and lead to meeting the problem of water easy layering.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a cement-based thin felt for a composite board and a production process thereof.
Background
The existing external wall panel is directly contacted with a building wall body through slurry, the external wall panel is easy to fall off due to poor strength after a long time, and the problem can be well solved by adding a layer of cement-based glass fiber mat which is firmly bonded with cement on the surface of the external wall panel.
The cement-based glass fiber mat in the current market has low cohesive strength, so that the bonding strength is too low and the mat is easy to delaminate due to low cohesive strength in the actual use process; due to the unreasonable design of the preparation process, the cement-based glass fiber mat can be subjected to structural damage in the cement-based glass fiber mat when meeting a high-humidity environment or a water-containing environment, and the strength is greatly reduced.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a cement-based thin felt for a composite board and a production process thereof.
The purpose of the invention can be realized by the following technical scheme:
the cement-based thin felt for the composite board comprises a glass fiber felt and slurry coated on two surfaces of the glass fiber felt, wherein the slurry comprises the following raw materials in parts by weight: 15-35 parts of cement, 10-20 parts of reinforcing fiber, 10-25 parts of barium sulfate, 15-26 parts of acrylic emulsion, 0.1-0.5 part of thickening agent, 0.5-1 part of anti-permeability agent and 10-20 parts of water;
the reinforced fiber is prepared by the following steps:
step S1, calcining the basalt fiber at 300 ℃ for 2h, then heating to 450 ℃, and continuing calcining for 2h to prepare the treated basalt fiber for later use; dispersing graphene oxide in deionized water, and performing ultrasonic dispersion in an ice-water bath to prepare a dispersion liquid for later use; sequentially adding 3,3',4,4' -benzophenonetetracarboxylic acid and 4,4 '-diaminodiphenyl ether into N, N-dimethylformamide, uniformly stirring until the materials are dissolved, standing for 10min to prepare a reaction solution for later use, and controlling the using amount ratio of graphene oxide to deionized water to be 3-5 g: 50mL, and the molar ratio of 3,3',4,4 '-benzophenonetetracarboxylic acid to 4,4' -diaminodiphenyl ether to be 1-1.2: 1,3,3',4,4' -benzophenonetetracarboxylic acid to N, N-dimethylformamide to be 1-1.5 g: 50mL;
and S2, slowly dripping the reaction liquid into the dispersion liquid, uniformly stirring at a rotating speed of 100r/min for 30min to prepare a composite emulsion, controlling the volume ratio of the reaction liquid to the dispersion liquid to be 1: 1, spraying the composite emulsion on the surface of the treated basalt fiber, wherein the spraying thickness is 0.15-0.25mm, drying at 100 ℃ for 4h, cooling to room temperature, leaching with deionized water for 12h, and drying again to prepare the reinforced fiber.
In the step S1, basalt fibers are calcined, a slurry layer on the surface is removed, then a dispersion liquid of graphene oxide in water is prepared, then 3,3',4,4' -benzophenone tetracarboxylic acid and 4,4' -diaminodiphenyl ether react in N, N-dimethylformamide to prepare a reaction liquid, the reaction liquid is a stable emulsion formed by tightly combining amic acid particles and N, N-dimethylformamide, graphene oxide forms a lamellar structure through ultrasound after being blended with the dispersion liquid, amic acid molecules can be inserted into the lamellar structure of the graphene oxide, and then the stable emulsion is sprayed on the surfaces of the basalt fibers and dried at 100 ℃, carboxyl groups of amic acid can be dehydrated and condensed with hydroxyl groups on the surfaces of the graphene oxide to form a stable intercalation structure, the composite emulsion can form a film on the surfaces of the fibers, the added graphene oxide forms protruding particles to increase the roughness of the surfaces of the fibers, the mechanical riveting effect between the fibers and a matrix can be increased, and the mechanical property of a matrix material can be improved.
Further: the thickener is any one of gelatin, seaweed gel and carboxymethyl cellulose.
A production process of a cement-based thin felt for a composite board comprises the following steps:
firstly, adding reinforcing fiber, cement, barium sulfate, acrylic emulsion, a thickening agent, an anti-permeability agent and water into a stirrer, stirring at a constant speed for 10min, and filtering by using a filter screen of 60-80 meshes to prepare slurry;
and secondly, coating the slurry on two sides of the glass fiber felt, curing after uniform coating, cooling and rolling to obtain the cement-based thin felt for the composite board.
Further: the coating thickness of the slurry is 0.1-0.2mm, and the curing temperature is 150-200 ℃.
The invention has the beneficial effects that:
the cement-based thin felt provided by the invention takes cement as a matrix, and reinforcing fibers are added to improve the mechanical property of the cement matrix, wherein the reinforcing fibers are used for calcining basalt fibers in the preparation process to remove a slurry layer on the surface, then a dispersion of graphene oxide in water is prepared, then 3,3',4,4' -benzophenonetetracarboxylic acid and 4,4' -diaminodiphenyl ether are reacted in N, N-dimethylformamide to prepare a reaction liquid, the reaction liquid is a stable emulsion formed by tightly combining amic acid particles and N, N-dimethylformamide, when the stable emulsion is blended with the dispersion, the graphene oxide forms a lamellar structure through ultrasound, amic acid molecules can be inserted into the lamellar structure of the graphene oxide, then the stable emulsion is sprayed on the surface of the basalt fibers and dried at 100 ℃, the carboxyl of the amic acid can be dehydrated and condensed with hydroxyl on the surface of the graphene oxide to form a stable intercalated structure, and the composite emulsion can form a film on the surface of the fibers, the added graphene oxide forms convex particles, the roughness of the surface of the fibers is increased, the mechanical strength between the fiber and the matrix is increased, and the cohesive strength is easily increased, so that the cohesive strength is easily increased when the water is met.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The reinforced fiber is prepared by the following steps:
step S1, calcining the basalt fiber at 300 ℃ for 2h, then heating to 450 ℃, and continuing calcining for 2h to prepare the treated basalt fiber for later use; dispersing graphene oxide in deionized water, and performing ultrasonic dispersion in an ice-water bath to prepare a dispersion liquid for later use; sequentially adding 3,3',4,4' -benzophenonetetracarboxylic acid and 4,4 '-diaminodiphenyl ether into N, N-dimethylformamide, uniformly stirring until the materials are dissolved, standing for 10min to prepare a reaction solution for later use, and controlling the use amount ratio of graphene oxide to deionized water to be 3 g: 50mL, and the use amount ratio of 3,3',4,4 '-benzophenonetetracarboxylic acid to 4,4' -diaminodiphenyl ether to be 1: 1,3,3',4,4' -benzophenonetetracarboxylic acid to N, N-dimethylformamide to be 1 g: 50mL;
and S2, slowly dripping the reaction liquid into the dispersion liquid, uniformly stirring at a rotating speed of 100r/min for 30min to prepare a composite emulsion, controlling the volume ratio of the reaction liquid to the dispersion liquid to be 1: 1, spraying the composite emulsion on the surface of the treated basalt fiber, wherein the spraying thickness is 0.15mm, drying at 100 ℃ for 4h, cooling to room temperature, leaching with deionized water for 12h, and drying again to prepare the reinforced fiber.
Example 2
The reinforced fiber is prepared by the following steps:
step S1, calcining the basalt fiber at 300 ℃ for 2h, then heating to 450 ℃, and continuing calcining for 2h to prepare the treated basalt fiber for later use; dispersing graphene oxide in deionized water, and performing ultrasonic dispersion in an ice-water bath to prepare a dispersion liquid for later use; sequentially adding 3,3',4,4' -benzophenonetetracarboxylic acid and 4,4 '-diaminodiphenyl ether into N, N-dimethylformamide, uniformly stirring until the materials are dissolved, standing for 10min to prepare a reaction solution for later use, and controlling the dosage ratio of graphene oxide to deionized water to be 4 g: 50mL, and the molar ratio of 3,3',4,4 '-benzophenonetetracarboxylic acid to 4,4' -diaminodiphenyl ether to be 1.1: 1,3,3',4,4' -benzophenonetetracarboxylic acid to N, N-dimethylformamide to be 1.2 g: 50mL;
and S2, slowly dripping the reaction liquid into the dispersion liquid, uniformly stirring at a rotating speed of 100r/min for 30min to prepare a composite emulsion, controlling the volume ratio of the reaction liquid to the dispersion liquid to be 1: 1, spraying the composite emulsion on the surface of the treated basalt fiber, wherein the spraying thickness is 0.20mm, drying at 100 ℃ for 4h, cooling to room temperature, leaching with deionized water for 12h, and drying again to prepare the reinforced fiber.
Example 3
The reinforced fiber is prepared by the following steps:
step S1, calcining the basalt fiber at 300 ℃ for 2h, then heating to 450 ℃, and continuing calcining for 2h to prepare the treated basalt fiber for later use; dispersing graphene oxide in deionized water, and performing ultrasonic dispersion in an ice-water bath to prepare a dispersion liquid for later use; sequentially adding 3,3',4,4' -benzophenone tetracarboxylic acid and 4,4 '-diaminodiphenyl ether into N, N-dimethylformamide, uniformly stirring until the materials are dissolved, standing for 10min to prepare a reaction solution for later use, and controlling the using amount ratio of graphene oxide to deionized water to be 5 g: 50mL and the using amount ratio of 3,3',4,4 '-benzophenone tetracarboxylic acid to 4,4' -diaminodiphenyl ether to be 1.2: 1,3,3',4,4' -benzophenone tetracarboxylic acid to N, N-dimethylformamide to be 1.5 g: 50mL;
and S2, slowly dripping the reaction liquid into the dispersion liquid, uniformly stirring at a rotating speed of 100r/min for 30min to prepare a composite emulsion, controlling the volume ratio of the reaction liquid to the dispersion liquid to be 1: 1, spraying the composite emulsion on the surface of the treated basalt fiber, wherein the spraying thickness is 0.25mm, drying at 100 ℃ for 4h, cooling to room temperature, leaching with deionized water for 12h, and drying again to prepare the reinforced fiber.
Example 4
The cement-based thin felt for the composite board comprises a glass fiber felt and slurry coated on two surfaces of the glass fiber felt, wherein the slurry comprises the following raw materials in parts by weight: 15 parts of cement, 10 parts of the reinforcing fiber prepared in example 1, 10 parts of barium sulfate, 15 parts of acrylic emulsion, 0.1 part of carboxymethyl cellulose, 0.5 part of an anti-permeability agent (DPS permanent coagulation liquid), and 10 parts of water;
firstly, adding reinforcing fiber, cement, barium sulfate, acrylic emulsion, a thickening agent, an anti-permeability agent (DPS permanent condensate) and water into a stirrer, stirring at a constant speed for 10min, and filtering by using a 60-mesh filter screen to prepare slurry;
and secondly, coating the slurry on two sides of the glass fiber felt, wherein the coating thickness is 0.1mm, curing the glass fiber felt after uniform coating, the curing temperature is 150 ℃, and then cooling and rolling the glass fiber felt to obtain the cement-based thin felt for the composite board.
Example 5
The cement-based thin felt for the composite board comprises a glass fiber felt and slurry coated on two surfaces of the glass fiber felt, wherein the slurry comprises the following raw materials in parts by weight: 25 parts of cement, 15 parts of the reinforcing fiber prepared in example 1, 20 parts of barium sulfate, 20 parts of acrylic emulsion, 0.3 part of carboxymethyl cellulose, 0.8 part of a permeation resistant agent (DPS permanent coagulation liquid), and 15 parts of water;
firstly, adding reinforcing fiber, cement, barium sulfate, acrylic emulsion, a thickening agent, an anti-permeability agent (DPS permanent condensate) and water into a stirrer, stirring at a constant speed for 10min, and filtering by using a 70-mesh filter screen to prepare slurry;
and secondly, coating the slurry on two sides of the glass fiber felt, wherein the coating thickness is 0.1mm, curing the glass fiber felt after uniform coating, the curing temperature is 180 ℃, and then cooling and rolling the glass fiber felt to obtain the cement-based thin felt for the composite board.
Example 6
The cement-based thin felt for the composite board comprises a glass fiber felt and slurry coated on two surfaces of the glass fiber felt, wherein the slurry comprises the following raw materials in parts by weight: 35 parts of cement, 20 parts of the reinforcing fiber prepared in example 1, 25 parts of barium sulfate, 26 parts of acrylic emulsion, 0.5 part of carboxymethyl cellulose, 1 part of an anti-permeability agent (DPS permanent coagulation liquid), and 20 parts of water;
adding reinforcing fiber, cement, barium sulfate, acrylic emulsion, a thickening agent, an anti-permeability agent (DPS permanent coagulation liquid) and water into a stirrer, stirring at a constant speed for 10min, and filtering with a 80-mesh filter screen to obtain slurry;
and secondly, coating the slurry on two sides of the glass fiber felt, wherein the coating thickness is 0.2mm, curing the glass fiber felt after uniform coating, the curing temperature is 200 ℃, and then cooling and rolling the glass fiber felt to obtain the cement-based thin felt for the composite board.
Comparative example 1
This comparative example compares to example 4 without the addition of reinforcing fibers.
Comparative example 2
This comparative example is a cement-based mat manufactured by a commercial company.
The test structures of the cement-based mats prepared in the examples 4 to 6 and the comparative examples 1 to 2 are shown in the following table according to the building industry standard JC/T287-2013 thermal insulation decorative exterior wall external thermal insulation system material:
it can be seen from the above table that examples 4-6 have excellent adhesive strength and are not easily delaminated after immersion in water.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (4)
1. The utility model provides a cement-based mat for composite sheet, includes glass fiber mat and the thick liquids of coating on its both sides which characterized in that: the slurry is prepared from the following raw materials in parts by weight: 15-35 parts of cement, 10-20 parts of reinforcing fiber, 10-25 parts of barium sulfate, 15-26 parts of acrylic emulsion, 0.1-0.5 part of thickening agent, 0.5-1 part of anti-permeability agent and 10-20 parts of water;
the reinforced fiber is prepared by the following steps:
step S1, calcining the basalt fiber at 300 ℃ for 2h, then heating to 450 ℃, and continuing calcining for 2h to prepare the treated basalt fiber for later use; dispersing graphene oxide in deionized water, and performing ultrasonic dispersion in an ice-water bath to prepare a dispersion liquid for later use; sequentially adding 3,3',4,4' -benzophenonetetracarboxylic acid and 4,4' -diaminodiphenyl ether into N, N-dimethylformamide, stirring at a constant speed until the materials are dissolved, and standing for 10min to prepare a reaction solution for later use;
s2, slowly dripping the reaction liquid into the dispersion liquid, uniformly stirring at a rotating speed of 100r/min for 30min to prepare a composite emulsion, controlling the volume ratio of the reaction liquid to the dispersion liquid to be 1: 1, spraying the composite emulsion on the surface of the treated basalt fiber, drying at 100 ℃ for 4h, cooling to room temperature, leaching with deionized water for 12h, and drying again to prepare the reinforced fiber;
in the step S1, the dosage ratio of the graphene oxide to the deionized water is controlled to be 3-5 g: 50mL, the molar ratio of 3,3',4,4' -benzophenonetetracarboxylic acid to 4,4' -diaminodiphenyl ether is 1-1.2: 1,3,3',4,4' -benzophenonetetracarboxylic acid to N, N-dimethylformamide is 1-1.5 g: 50mL;
the spraying thickness of the composite emulsion in the step S2 is 0.15-0.25mm.
2. The cement-based mat for composite boards as claimed in claim 1, wherein: the thickener is any one of gelatin, seaweed gel and carboxymethyl cellulose.
3. The process of claim 1 for producing a cement-based mat for composite panels, wherein: the method comprises the following steps:
firstly, adding reinforcing fiber, cement, barium sulfate, acrylic emulsion, a thickening agent, an anti-permeability agent and water into a stirrer, stirring at a constant speed for 10min, and filtering by using a filter screen of 60-80 meshes to prepare slurry;
and secondly, coating the slurry on two sides of the glass fiber felt, curing after uniform coating, cooling and rolling to obtain the cement-based thin felt for the composite board.
4. The process of claim 3 for producing a cement-based mat for composite panels, wherein: the coating thickness of the slurry is 0.1-0.2mm, and the curing temperature is 150-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431071.3A CN113896470B (en) | 2021-11-29 | 2021-11-29 | Cement-based thin felt for composite board and production process thereof |
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Application publication date: 20220107 Assignee: Anhui Ruijin Energy Saving Technology Co.,Ltd. Assignor: Anhui Ruilian Energy Saving Technology Co.,Ltd. Contract record no.: X2024980004583 Denomination of invention: A cement-based thin felt for composite boards and its production process Granted publication date: 20230113 License type: Exclusive License Record date: 20240424 |
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