CN111662068A - Lightweight fireproof daub and preparation method thereof - Google Patents
Lightweight fireproof daub and preparation method thereof Download PDFInfo
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- CN111662068A CN111662068A CN202010535530.1A CN202010535530A CN111662068A CN 111662068 A CN111662068 A CN 111662068A CN 202010535530 A CN202010535530 A CN 202010535530A CN 111662068 A CN111662068 A CN 111662068A
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
- C04B18/265—Wood, e.g. sawdust, wood shavings from specific species, e.g. birch
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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
- 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
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- 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
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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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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
- 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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- 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
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Abstract
The invention discloses a lightweight fireproof daub which comprises the following components in percentage by mass: 35-42% of sodium silicate, 15-20% of polyisobutylene, 7-10% of magnesium salt whisker, 28-30% of silicon micropowder, 1-2% of wood fiber, 2-4% of polystyrene particles, 0.05-0.1% of polyethylene glycol and 0.65-1% of coupling agent. The invention also discloses a preparation method of the lightweight fireproof daub. The lightweight fireproof mortar prepared by the invention has good sealing performance, good flame-retardant and fireproof performance and excellent mechanical performance.
Description
The technical field is as follows:
the invention relates to the field of fireproof materials, in particular to lightweight fireproof daub and a preparation method thereof.
Background art:
the fireproof daub is also named as organic fireproof blocking material and is made up by using organic synthetic resin as adhesive, adding fire-proofing agent and filling material, and rolling. The blocking material is not solidified for a long time, has good plasticity and can be blocked randomly. The blocking material is mainly applied to the fireproof blocking engineering of building pipelines and wire and cable through-penetration holes and is matched with inorganic fireproof blocking materials and fireproof bags for use. The butyl rubber sealing plaster is a caulking sealing material, commonly called putty. It is made up by using elastomer as main raw material, adding some powdered filler and adding viscosity-increasing agent and softening agent, etc. so as to obtain optimum performance and reduce cost. The sealing daub does not contain solvent, has good plasticity, can be used repeatedly and keeps the plasticity for a long time.
Chinese patent CN201410236445.X discloses a fireproof long-acting sealant, which comprises 20-30 parts of butyl rubber, 15-25 parts of polyisobutylene, 17-21 parts of liquid polybutene, 7-10 parts of hard fat glue, 15-25 parts of tribasic phosphate, 13-16 parts of nano calcium carbonate, 18-24 parts of magnesium hydroxide, 3-6 parts of barium sulfate, 15-18 parts of aluminum hydroxide, 10-20 parts of rutile titanium dioxide, 7-14 parts of phosphate flame retardant, 6-9 parts of diatomite and 12-16 parts of polyisobutylene. Although the sealant provided by the prior art has good sealing performance, a large amount of flame retardant and modified filler are added, so that the preparation cost of the sealant is increased, and the sealing performance of the sealant is influenced to a certain extent.
The invention content is as follows:
one of the technical problems to be solved by the invention is to provide a lightweight fireproof daub which has good stability, excellent fireproof and flame-retardant properties, good sealing property and good mechanical properties.
The second technical problem to be solved by the invention is to provide a preparation method of the lightweight fireproof daub aiming at the defects of the prior art, the preparation method is simple to operate, and the prepared lightweight fireproof daub has excellent performance.
In order to solve the first technical problem, the invention adopts the following technical scheme:
the lightweight fireproof mortar comprises the following components in percentage by mass:
35-42% of sodium silicate, 15-20% of polyisobutylene, 7-10% of magnesium salt whisker, 28-30% of silicon micropowder, 1-2% of wood fiber, 2-4% of polystyrene particles, 0.05-0.1% of polyethylene glycol and 0.65-1% of coupling agent.
As a preferable technical proposal, the bulk specific gravity of the silicon micro powder is 0.6 to 1.2g/cm3The purity is more than 99.9 percent, and the average grain diameter is 3-5 mu m.
As a preferred technical scheme, the wood fiber takes pine sawdust as a raw material, the pine sawdust is firstly placed in hot water for boiling treatment for 10 to 15 hours, and then the pine sawdust is cut into fibers with the average length of 2mm and the diameter of 1 to 2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 5-8%; and finally, soaking the mixture in an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 3-5%, and drying to constant weight to obtain the product.
As a preferable technical scheme, the time of soaking treatment by adopting the sodium hydroxide solution is 10-15 h.
As a preferable technical scheme, the soaking treatment time by using the absolute ethyl alcohol solution of the 3-triethoxysilyl-1-propylamine is 10 to 20 hours.
As a preferable technical proposal, the average diameter of the magnesium salt whisker is 1.0 μm; the average length of the magnesium salt whisker is 10-40 μm.
As a preferable technical proposal, the polystyrene particles have the average diameter of 1-2mm and the density of 0.022g/cm3The bulk density was 0.014g/cm3。
As a preferred technical scheme, the coupling agent is one or a mixture of silane coupling agent and titanate coupling agent.
In order to solve the second technical problem, the technical scheme adopted by the invention is as follows:
a preparation method of lightweight fireproof mortar comprises the following steps:
adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 1-5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 5-15 minutes, and finally adding a coupling agent, stirring and kneading for 2-5 minutes to obtain the lightweight fireproof daub.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the lightweight fireproof daub provided by the invention comprises sodium silicate, polyisobutylene, magnesium salt whiskers, silicon micropowder, wood fibers, polystyrene particles and a coupling agent; sodium silicate is used as inorganic glue, polyisobutylene is used as organic glue, magnesium salt whiskers are added as a flame retardant, silica micropowder, wood fiber and polystyrene particles are added as reinforcing fillers, and a coupling agent is added to improve the interface performance of the inorganic fillers and a matrix, so that the prepared lightweight fireproof daub has good flame-retardant and fireproof performance, good stability and excellent corrosion resistance.
The wood fiber added in the invention takes pine sawdust as a raw material, and after boiling, softening and cutting, the pine sawdust is soaked in sodium hydroxide solution and 3-triethoxysilyl-1-propylamine absolute ethyl alcohol solution in sequence; the hemicellulose can be effectively removed, the surface performance of the wood fiber is improved, and the adhesion between the wood fiber and a matrix is promoted; the prepared fireproof daub has good stability. The fireproof daub prepared by the invention does not contain halogen and asbestos, and is non-toxic and environment-friendly. The invention also adds proper amount of polyethylene glycol into the daub, the polyethylene glycol molecule has an organophilic phase end and an inotropic phase end at the same time, and the interface performance between the inorganic component and the organic component is improved; the end of the polyethylene glycol molecule, which is the organophilic phase, has strong solvation and steric hindrance effects, so that the dispersibility of the inorganic phase in the matrix is improved; the polyethylene glycol has good wettability, and the storage stability of the daub can be effectively improved on the premise of not influencing the adhesiveness of the daub; the daub prepared by the method is single-component and has good stability.
The specific implementation mode is as follows:
the present invention is further illustrated by the following examples, which are provided for the purpose of illustration only and are not intended to be limiting.
The sodium silicate used in the following examples was liquid sodium silicate having a sodium oxide content of 13.75%, a silicon dioxide content of 29.99%, a baume degree of 50, and a fineness modulus of 2.3; the magnesium salt whisker is basic magnesium sulfate whisker, and the specific gravity of the magnesium salt whisker is 2.3g/cm 3; the bulk specific gravity is 0.1-0.3g/cm 3; the polyisobutene is Korean Dalin PB 2400; the loose density of the wood fiber is 0.3-0.45 g/L, the water content is less than or equal to 5%, and the average length is 1.7 mm; the bulk specific gravity of the silicon micropowder is 0.6-1.2g/cm3The purity is more than 99.9 percent, and the average grain diameter is 3-5 mu m; the polyethylene glycol is polyethylene glycol 400, and the molecular weight thereof is 380-430.
Example 1
The lightweight fireproof mortar comprises the following components in percentage by mass:
39.95% of sodium silicate, 18% of polyisobutylene, 7% of magnesium salt whisker, 28% of silicon micropowder, 2% of wood fiber, 4% of polystyrene particles and 0.05% of polyethylene glycol; 1% of a silane coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 10 hours, and then cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 5% for 10 hours; finally, soaking the mixture for 10 hours by using an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 3 percent, and drying the mixture to constant weight to obtain the compound bactericide;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 1 minute, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and finally adding a silane coupling agent, stirring and kneading for 2 minutes to obtain the lightweight fireproof daub.
Example 2
The lightweight fireproof mortar comprises the following components in percentage by mass:
40.05% of sodium silicate, 17.75% of polyisobutylene, 8.03% of magnesium salt whisker, 28.02% of silicon micropowder, 1.55% of wood fiber, 3.85% of polystyrene particles, 0.1% of polyethylene glycol and 0.65% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 15 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 8% for 15 hours; finally, soaking the mixture for 20 hours by adopting an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 5 percent, and drying the mixture to constant weight to obtain the compound bactericide;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and finally adding a titanate coupling agent, stirring and kneading for 5 minutes to obtain the lightweight fireproof daub.
Example 3
The lightweight fireproof mortar comprises the following components in percentage by mass:
39.3% of sodium silicate, 17.05% of polyisobutylene, 8.59% of magnesium salt whisker, 28.985% of silicon micropowder, 1.71% of wood fiber, 3.42% of polystyrene particles, 0.075% of polyethylene glycol and 0.87% of silane coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 11 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 6% for 11 hours; finally, soaking the mixture for 12 hours by using an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 3.5 percent, and drying the mixture to constant weight to obtain the compound bactericide;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 10 minutes, and finally adding a silane coupling agent, stirring and kneading for 5 minutes to obtain the lightweight fireproof daub.
Example 4
The lightweight fireproof mortar comprises the following components in percentage by mass:
40.13% of sodium silicate, 16.07% of polyisobutylene, 9.96% of magnesium salt whisker, 30% of silicon micropowder, 1.0% of wood fiber, 2% of polystyrene particles, 0.05-0.1% of polyethylene glycol and 0.84% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 13 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a 7% sodium hydroxide solution for 13 h; finally, soaking the mixture for 16 hours by adopting an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 4 percent, and drying the mixture to constant weight to obtain the compound bactericide;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 3 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 5 minutes, and finally adding a titanate coupling agent, stirring and kneading for 3 minutes to obtain the lightweight fireproof daub.
Example 5
The lightweight fireproof mortar comprises the following components in percentage by mass:
38.4% of sodium silicate, 17.88% of polyisobutylene, 9.55% of magnesium salt whisker, 28.02% of silicon micropowder, 1.35% of wood fiber, 3.75% of polystyrene particles, 0.05% of polyethylene glycol and 1% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 12 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 6.5% for 12 hours; finally, soaking the mixture for 14 hours by using an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 4%, and drying the mixture to constant weight to obtain the compound bactericide;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and finally adding a titanate coupling agent, stirring and kneading for 4 minutes to obtain the lightweight fireproof daub.
Example 6
The lightweight fireproof mortar comprises the following components in percentage by mass:
37.51% of sodium silicate, 19.66% of polyisobutylene, 7.6% of magnesium salt whisker, 30% of silicon micropowder, 1.08% of wood fiber, 3.45% of polystyrene particles, 0.05% of polyethylene glycol and 0.65% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 14 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 7.5% for 14 h; finally, soaking the mixture for 18 hours by using an absolute ethanol solution of 4.5 percent by mass of 3-triethoxysilyl-1-propylamine, and drying the mixture to constant weight to obtain the compound amino acid propyl ester;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and finally adding a titanate coupling agent, stirring and kneading for 2 minutes to obtain the lightweight fireproof daub.
Comparative example 1
The lightweight fireproof mortar comprises the following components in percentage by mass:
38.16% of sodium silicate, 19.66% of polyisobutylene, 7.6% of magnesium salt whisker, 30% of silicon micropowder, 1.08% of wood fiber and 3.45% of polystyrene particles; 0.05 percent of polyethylene glycol,
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 14 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 7.5% for 14 h; finally, soaking the mixture for 18 hours by using an absolute ethanol solution of 4.5 percent by mass of 3-triethoxysilyl-1-propylamine, and drying the mixture to constant weight to obtain the compound amino acid propyl ester;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and obtaining the lightweight fireproof daub.
Comparative example 2
The lightweight fireproof mortar comprises the following components in percentage by mass:
37.51% of sodium silicate, 19.66% of polyisobutylene, 7.6% of magnesium salt whisker, 30% of silicon micropowder, 1.08% of wood fiber, 3.45% of polystyrene particles, 0.05% of polyethylene glycol and 0.65% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 14 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 7.5% for 14 h; drying to constant weight to obtain the final product;
the preparation method comprises the following steps: adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, and finally adding a titanate coupling agent, stirring and kneading for 2 minutes to obtain the lightweight fireproof daub.
Comparative example 3
The lightweight fireproof mortar comprises the following components in percentage by mass:
37.51% of sodium silicate, 19.66% of polyisobutylene, 7.65% of magnesium salt whisker, 30% of silicon micropowder, 1.08% of wood fiber, 3.45% of polystyrene particles and 0.65% of titanate coupling agent;
the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 14 hours, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 7.5% for 14 h; finally, soaking the mixture for 18 hours by using an absolute ethanol solution of 4.5 percent by mass of 3-triethoxysilyl-1-propylamine, and drying the mixture to constant weight to obtain the compound amino acid propyl ester;
the preparation method comprises the following steps: adding sodium silicate into a kneading machine, stirring for 5 minutes, adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 15 minutes, adding a titanate coupling agent, stirring and kneading for 2 minutes, and obtaining the lightweight fireproof daub.
The lightweight fireproof daub prepared by the invention is subjected to performance test, and the test result is shown in table 1; wherein the storage stability is that the state of the daub is observed, the viscosity is obviously changed, and the extrusion property is deteriorated to be invalid, so that the shelf life of the daub is obtained.
TABLE 1
The test results show that the lightweight fireproof daub prepared by the invention has good fireproof and flame retardant properties, and after a proper amount of coupling agent and polyethylene glycol are added into the daub and wood fibers are treated, the prepared daub has more excellent properties and good storage stability.
Although specific embodiments of the invention have been described, many other forms and modifications of the invention will be apparent to those skilled in the art. It is to be understood that the appended claims and this invention generally cover all such obvious forms and modifications which are within the true spirit and scope of the present invention.
Claims (9)
1. The lightweight fireproof mortar is characterized by comprising the following components in percentage by mass:
35-42% of sodium silicate, 15-20% of polyisobutylene, 7-10% of magnesium salt whisker, 28-30% of silicon micropowder, 1-2% of wood fiber, 2-4% of polystyrene particles, 0.05-0.1% of polyethylene glycol and 0.65-1% of coupling agent.
2. The lightweight fireproof mastic as claimed in claim 1, wherein: the bulk specific gravity of the silicon micro powder is 0.6-1.2g/cm3The purity is more than 99.9 percent, and the average grain diameter is 3-5 mu m.
3. The lightweight fireproof mastic as claimed in claim 1, wherein: the wood fiber is prepared by using pine sawdust as a raw material, boiling the pine sawdust in hot water for 10-15h, and cutting the pine sawdust into fibers with the average length of 2mm and the diameter of 1-2 mu m by a filament cutter; finally, soaking the fiber in a sodium hydroxide solution with the mass concentration of 5-8%; and finally, soaking the mixture in an absolute ethanol solution of 3-triethoxysilyl-1-propylamine with the mass concentration of 3-5%, and drying to constant weight to obtain the product.
4. The lightweight fire-retardant mastic as claimed in claim 3, wherein: the time for soaking treatment by adopting a sodium hydroxide solution is 10-15 h.
5. The lightweight fire-retardant mastic as claimed in claim 3, wherein: soaking in anhydrous alcohol solution of 3-triethoxysilyl-1-propylamine for 10-20 h.
6. The lightweight fireproof mastic as claimed in claim 1, wherein: the average diameter of the magnesium salt whisker is 0.1-0.2 μm; the average length of the magnesium salt whisker is 15-30 μm.
7. The lightweight fireproof mastic as claimed in claim 1, wherein: the polystyrene particles have an average diameter of 1-2mm and a density of 0.022g/cm3The bulk density was 0.014g/cm3。
8. The lightweight fireproof mastic as claimed in claim 1, wherein: the coupling agent is one or a mixture of silane coupling agent and titanate coupling agent.
9. The preparation method of the light-weight fireproof mortar according to any one of claims 1 to 8, characterized by comprising the following steps:
adding polyethylene glycol and sodium silicate into a kneading machine, stirring and mixing for 1-5 minutes, then adding silicon micropowder, magnesium salt whiskers, wood fibers, polystyrene particles and polyisobutylene into the kneading machine, stirring and mixing for 5-15 minutes, and finally adding a coupling agent, stirring and kneading for 2-5 minutes to obtain the lightweight fireproof daub.
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| JPS60238380A (en) * | 1984-05-10 | 1985-11-27 | Nitto Boseki Co Ltd | Fire-resistant sealing medium |
| CN102172946A (en) * | 2010-12-24 | 2011-09-07 | 上海国成塑料有限公司 | Wood fiber preprocessing method during wood plastic composite material preparation |
| CN107033449A (en) * | 2016-11-17 | 2017-08-11 | 台州学院 | A kind of sisal fiber reinforced polypropylene compound material and preparation method thereof |
| CN107266088A (en) * | 2017-06-26 | 2017-10-20 | 上海火克新材料有限公司 | A kind of refractory mortar and its application |
| CN108395520A (en) * | 2018-02-09 | 2018-08-14 | 浙江迪思威电气股份有限公司 | A kind of fire retardant insulating plugging material and preparation method thereof for hermetically-sealed cable installation interporal lacuna |
| CN111087960A (en) * | 2019-12-23 | 2020-05-01 | 安徽鼎特瑞网络科技有限公司 | High-temperature daub for building refractory bricks of rotary cement kiln and preparation method thereof |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60238380A (en) * | 1984-05-10 | 1985-11-27 | Nitto Boseki Co Ltd | Fire-resistant sealing medium |
| CN102172946A (en) * | 2010-12-24 | 2011-09-07 | 上海国成塑料有限公司 | Wood fiber preprocessing method during wood plastic composite material preparation |
| CN107033449A (en) * | 2016-11-17 | 2017-08-11 | 台州学院 | A kind of sisal fiber reinforced polypropylene compound material and preparation method thereof |
| CN107266088A (en) * | 2017-06-26 | 2017-10-20 | 上海火克新材料有限公司 | A kind of refractory mortar and its application |
| CN108395520A (en) * | 2018-02-09 | 2018-08-14 | 浙江迪思威电气股份有限公司 | A kind of fire retardant insulating plugging material and preparation method thereof for hermetically-sealed cable installation interporal lacuna |
| CN111087960A (en) * | 2019-12-23 | 2020-05-01 | 安徽鼎特瑞网络科技有限公司 | High-temperature daub for building refractory bricks of rotary cement kiln and preparation method thereof |
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