CN114230254A - Environment-friendly water-based nano thermal insulation material and preparation method thereof - Google Patents

Environment-friendly water-based nano thermal insulation material and preparation method thereof Download PDF

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CN114230254A
CN114230254A CN202111648063.4A CN202111648063A CN114230254A CN 114230254 A CN114230254 A CN 114230254A CN 202111648063 A CN202111648063 A CN 202111648063A CN 114230254 A CN114230254 A CN 114230254A
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王孝红
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003—Methods for mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003—Methods for mixing
    • B28C5/006—Methods for mixing involving mechanical aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806—Details; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
    • 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
    • C04B2111/00008—Obtaining or using nanotechnology related 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00508—Cement paints
    • 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
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
    • 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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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Building Environments (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention discloses an environment-friendly water-based nano heat-insulating material and a preparation method thereof, and the environment-friendly water-based nano heat-insulating material comprises the following raw materials, by weight, 80-120 parts of cement paste, 1-3 parts of a dispersing agent, 2-5 parts of a water repellent, 3-5 parts of a flame retardant, 50-100 parts of silica nano aerogel, 40-80 parts of nano cellulose aerogel, 20-40 parts of vitrified micro bubbles, 5-10 parts of an inorganic filler, 80-120 parts of an organic filler, 8-15 parts of a foaming agent, 5-10 parts of a curing agent and 20-40 parts of an aqueous solvent, wherein the cement paste is used as a base material, the silica aerogel, the nano cellulose aerogel and the vitrified micro bubbles are used as homogeneous aggregates, the organic filler and the inorganic filler are used as fillers, and various auxiliary agents are added to prepare the environment-friendly water-based nano heat-insulating material, the fireproof and waterproof effect is good, the waste recycling is realized, the environment is protected, the reliability is high, and the fireproof and waterproof paint is widely applied to building heat insulation engineering.

Description

Environment-friendly water-based nano thermal insulation material and preparation method thereof
Technical Field
The invention relates to the field of nano heat-insulating materials, in particular to an environment-friendly water-based nano heat-insulating material and a preparation method thereof.
Background
The heat insulation material generally refers to a material with a heat conductivity coefficient less than or equal to 0.2, and at present, the global heat insulation material is developing towards the integration direction of high efficiency, energy conservation, thin layer, heat insulation, water prevention and external protection, and the heat insulation material is designed and constructed according to standard specifications while developing a novel heat insulation material and conforming to the structure heat insulation and energy conservation technology, so that the heat insulation efficiency is improved and the cost is reduced.
At present, the building energy-saving and heat-insulating material comprises: organic heat insulating materials and inorganic heat insulating materials. Organic substances mainly include polystyrene foam (EPS), Polyurethane (PU), phenol resin (PF), and the like; the inorganic materials mainly comprise aluminum silicate fibers, foamed concrete, newly-emerged aerogel glass fiber felts, aluminum foils, rock wool, perlite and composite vacuumizing heat-insulating heat-preserving plates, and all of the inorganic materials have inevitable defects in the using process.
The organic heat-insulating material has the advantages of low heat conductivity coefficient and good heat-insulating effect, but the fire-proof combustion grade is difficult to reach A grade. The common inorganic heat-insulating material has high heat conductivity coefficient, poor heat-insulating effect and good fireproof performance, but the heat-insulating effect is not ideal under the high-temperature condition, and the 75 percent energy-saving requirement is difficult to achieve.
At present, organic heat insulation materials such as polystyrene foam (EPS), Polyurethane (PU), phenolic resin (PF) and the like are widely applied to building heat insulation materials, and the materials are troublesome to treat after a house is dismantled, are difficult to degrade naturally and seriously affect the environment.
The development of the environment-friendly nanometer heat-insulating material with excellent heat insulation and heat preservation, fire prevention safety and environmental protection, which is a key research subject and development direction of heat-insulating and heat-preserving energy-saving technology and materials for buildings at home and abroad, and is a future development trend of the heat-insulating and heat-preserving engineering market for buildings.
Disclosure of Invention
In order to solve the technical problems, the invention provides an environment-friendly water-based nano heat-insulating material which comprises, by weight, 80-120 parts of cement paste, 1-3 parts of a dispersing agent, 2-5 parts of a water repellent, 3-5 parts of a flame retardant, 50-100 parts of silica nano aerogel, 40-80 parts of nano cellulose aerogel, 20-40 parts of vitrified micro bubbles, 5-10 parts of an inorganic filler, 80-120 parts of an organic filler, 8-15 parts of a foaming agent, 5-10 parts of a curing agent and 20-40 parts of a water solvent.
By adopting the technical scheme, the silicon dioxide nano aerogel, the nano cellulose aerogel, the organic filler and the inorganic filler can be compounded together, the heat insulation performance is greatly improved, and the nano cellulose aerogel and the water repellent are used, so that the material disclosed by the invention has good hydrophobicity.
Preferably: the mortar comprises the following raw materials, by weight, 100 parts of cement slurry, 2 parts of a dispersing agent, 3.5 parts of a water repellent, 4 parts of a flame retardant, 75 parts of silica nano aerogel, 60 parts of nano cellulose aerogel, 30 parts of vitrified micro bubbles, 7.5 parts of an inorganic filler, 100 parts of an organic filler, 11.5 parts of a foaming agent, 7.5 parts of a curing agent and 30 parts of a hydrosolvent.
Preferably: the silicon dioxide nano aerogel is silicon dioxide aerogel with the particle size of 10-20 nm and the bulk density of 40-60 kg/m 3.
Through the technical scheme: the silicon dioxide aerogel has extremely high porosity and extremely low thermal conductivity, and the nano-scale silicon dioxide aerogel powder is used in the invention to improve the thermal insulation performance of the thermal insulation material.
Preferably: the nano cellulose aerogel has the particle size of 20-50 nm and the bulk density of 20-50 kg/m 3.
Through the technical scheme: the nano-cellulose used in the invention is a cellulose mixture obtained by pretreating cellulose raw pulp, tetramethylpiperidine oxynitride and bromide; in the presence of alkali liquor, carrying out oxidation reaction on the cellulose mixture and a strong oxide to obtain an oxidation product; carrying out ultrasonic treatment on the oxidation product, and then washing with water to obtain a nano cellulose suspension; mixing the nano-cellulose suspension with acidified alkyl silsesquioxane to obtain a mixed solution; and atomizing the mixed solution, and freeze-drying to obtain the nano-cellulose aerogel. According to the method, renewable fiber wood pulp is used as a raw material, fiber bundles are depolymerized to obtain a nano-cellulose suspension, and the nano-cellulose aerogel with excellent hydrophobicity is obtained by adopting in-situ grafting modification, spraying and freeze drying methods; the nano-cellulose aerogel is prepared into powder particles and added into the thermal insulation material, the hydrophobic angle of the nano-cellulose aerogel is more than 150 degrees, the heat conductivity coefficient is lower than 0.027W/m.K, the nano-cellulose aerogel can be bent at will, the nano-cellulose aerogel has excellent flexibility, the nano-cellulose aerogel is used for increasing the thermal insulation performance and the water delivery performance of the thermal insulation material, and the strength of the thermal insulation material can be increased.
Preferably: the particle diameter of the vitrified micro bubbles is 20-50 μm, and the bulk density is 100-200 kg/m 3.
Through the technical scheme: the vitrified micro bubbles have very stable physical and chemical properties, strong aging resistance and weather resistance, and excellent heat insulation, fire prevention and sound absorption properties, are used as light filling aggregate and heat insulation, fire prevention, sound absorption and heat insulation materials in the heat insulation material, and can also improve the flowability and self-resistance strength of cement mortar, reduce the material shrinkage rate, improve the comprehensive performance of products and reduce the comprehensive production cost.
Preferably: the particle size of the organic filler is 0.2-2 mm.
Preferably: the organic filler is one or more of polystyrene foam, rigid polyurethane or phenolic resin.
Through the technical scheme: the recycled traditional heat insulation material, one or more of polystyrene foam, hard polyurethane or phenolic resin is crushed into fine particles and is used for being added into the heat insulation material, so that the recycling is realized, the environment pollution caused by waste is avoided, the excellent heat insulation performance can be utilized, and the production cost can be reduced.
Preferably: the inorganic filler is one or more of carbon nano tube, wollastonite powder and mica powder.
Preferably: the tube diameter of the carbon nano tube is 15-60 nm, the bulk density is 15-65 kg/m, the wollastonite powder is needle-shaped, the fineness is 700 meshes plus 300 meshes, the mica powder is white sheet-shaped, and the fineness is 500 meshes plus 400 meshes.
Through the technical scheme: the carbon nano tube is used as a reinforcing fiber, so that the strength of the heat-insulating material is improved, and in addition, three heat conduction paths can be blocked or shielded by matching the unique structure with wollastonite powder and mica powder.
Preferably: the flame retardant is magnesium hydroxide or aluminum hydroxide.
Preferably: the dispersant is a special nano material dispersant.
Preferably: the water repellent is one of hydrogen-containing silicone oil, methyl potassium silicate and organosilicon water repellent.
Preferably: the curing agent is one of formic acid, p-toluenesulfonic acid, phenolsulfonic acid and organic ester curing agents.
Preferably: the foaming agent is one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and alpha-sodium alkenyl sulfonate.
Preferably: the water solvent is one of pure water, deionized water and distilled water.
A preparation method of an environment-friendly water-based nano thermal insulation material comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: adding cement paste, a hydrosolvent, a dispersant, a flame retardant, a water repellent and a foaming agent into stirring equipment for stirring and mixing to ensure that the system is uniformly dispersed;
s3: then adding the silicon dioxide nano aerogel, the nano cellulose aerogel, the vitrified micro bubbles, the inorganic filler and the organic filler into stirring equipment, stirring for 10min at the speed of 200r/min,
s4: and finally, adding the stirred raw materials into a forming device for foaming and forming.
The utility model provides an environmental protection aqueous nanometer insulation material to reserve agitated vessel, includes a jar body, is equipped with rabbling mechanism in the jar body, and the rabbling mechanism is including scraping material stirring subassembly, intermediate speed dispersion stirring subassembly and high-speed dispersion stirring subassembly, scrapes the material stirring subassembly and is used for scraping the material that bonds at jar side wall and bottom and stirs, and intermediate speed dispersion stirring subassembly and high-speed dispersion stirring subassembly are used for stirring the material dispersion even.
Through the technical scheme: can realize the rapid stirring and mixing of all materials, and lead the system to be dispersed evenly.
Scrape material stirring subassembly including scraping the material (mixing) shaft, scrape material (mixing) shaft axial and jar body direction of height unanimous, scrape the material (mixing) shaft and arrange the central zone form at the jar body, scrape and be equipped with U type support on the material (mixing) shaft, be equipped with on the U type support and scrape the material blade, scrape the material blade and move towards interval distribution along the U type of U type support, scrape material blade and jar side wall and bottom laminating.
Through the technical scheme: can realize scraping the material of jar side wall and bottom at the stirring in-process, avoid bonding to pile up, guarantee that each material can be by the homogeneous mixing together.
The middle-speed dispersion stirring subassembly includes the middle-speed (mixing) shaft, and the axial of middle-speed (mixing) shaft is unanimous with the direction of height of the jar body, and the interval arrangement has the disc about the middle-speed (mixing) shaft axle body, and disc quotation level is arranged, and the disc outer lane is provided with A guide vane and B guide vane, and A guide vane and B guide vane are along the crisscross distribution of axial of disc, and A guide vane is used for guiding the material top to one side, and B guide vane is used for guiding the material below to one side.
Through the technical scheme: can realize the staggered guide of materials to the upper part and the lower part, realizes the dispersion purpose, leads the system to be uniformly dispersed,
high-speed dispersion stirring subassembly includes high-speed (mixing) shaft, and high-speed (mixing) shaft axial is unanimous with the direction of height of the jar body, and high-speed (mixing) shaft and medium speed (mixing) shaft are located scraping (mixing) shaft both sides and are located the U type region of U type support, and the interval distribution has dispersion blade about the axle body of high-speed (mixing) shaft, and dispersion blade comprises two half ring form blade portions, and blade portion arranges along the axial of high-speed (mixing) shaft, and two blade portion openings are arranged relatively.
Through the technical scheme: can realize high-speed dispersion and stirring, and simultaneously realizes the purposes of foaming and stirring by matching with a foaming agent.
The invention has the technical effects and advantages that: the heat-insulating material provided by the invention has the advantages of nano heat-insulating property, good fireproof and waterproof effects, realization of waste recycling, environmental protection, reliability and wide application in building heat-insulating engineering.
Drawings
Fig. 1 is a schematic structural diagram of an environment-friendly water-based nano thermal insulation material to a standby stirring device provided by the invention.
Fig. 2 is a schematic structural diagram of the environment-friendly water-based nano heat-insulating material applied to the interior of a tank body of a standby stirring device.
Fig. 3 is a schematic structural diagram of a scraping and stirring assembly for transferring an environment-friendly water-based nano thermal insulation material into a standby stirring device, according to the present invention.
Fig. 4 is a schematic structural diagram of a medium-speed dispersing and stirring assembly in a standby stirring device for preparing an environment-friendly water-based nano heat-insulating material according to the present invention.
Fig. 5 is a schematic structural diagram of a high-speed dispersing and stirring assembly in a standby stirring device for preparing an environment-friendly water-based nano thermal insulation material according to the present invention.
Description of reference numerals: 100-tank body, 200-stirring mechanism, 210-scraping stirring component, 211-scraping stirring shaft, 212-U-shaped bracket, 213-scraping blade, 220-medium speed dispersing stirring component, 221-medium speed stirring shaft, 222-disc, 223-A guide blade, 224-B guide blade, 230-high speed dispersing stirring component, 231-high speed stirring shaft and 232-dispersing blade.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
The embodiment provides an environment-friendly water-based nano thermal insulation material which comprises, by weight, 80 parts of cement paste, 1 part of a dispersing agent, 2 parts of a water repellent, 3 parts of a flame retardant, 50 parts of silica nano aerogel, 40 parts of nano cellulose aerogel, 20 parts of vitrified micro bubbles, 5 parts of an inorganic filler, 80 parts of an organic filler, 8 parts of a foaming agent, 5 parts of a curing agent and 20 parts of a water solvent.
The silicon dioxide nano aerogel is silicon dioxide aerogel with the particle size of 10nm and the bulk density of 40kg/m 3; the particle size of the nano cellulose aerogel is 20nm, and the bulk density is 20kg/m 3; the particle size of the vitrified micro bubbles is 20 mu m, and the bulk density is 100kg/m 3; the organic filler is hard polyurethane particles with the particle size of 0.2 mm; the inorganic filler is a mixture of carbon nano tubes with the tube diameter of 15nm and the bulk density of 15kg/m3, acicular wollastonite powder with the fineness of 300 meshes and sheet mica powder with the fineness of 400 meshes; the flame retardant is magnesium hydroxide; the dispersant is a special nano material dispersant; the water repellent is hydrogen-containing silicone oil; the curing agent is formic acid; the foaming agent is sodium dodecyl sulfate; the hydrosolvent is pure water.
Example 2
The embodiment provides an environment-friendly water-based nano thermal insulation material which comprises the following raw materials, by weight, 100 parts of cement paste, 2 parts of a dispersing agent, 3.5 parts of a water repellent, 4 parts of a flame retardant, 75 parts of silica nano aerogel, 60 parts of nano cellulose aerogel, 30 parts of vitrified micro bubbles, 7.5 parts of an inorganic filler, 100 parts of an organic filler, 11.5 parts of a foaming agent, 7.5 parts of a curing agent and 30 parts of a water solvent.
The silicon dioxide nano aerogel is silicon dioxide aerogel with the particle size of 15nm and the bulk density of 50kg/m 3; the particle size of the nano cellulose aerogel is 35nm, and the bulk density is 35 kg/m; the particle size of the vitrified micro bubbles is 35 mu m, and the bulk density is 150 kg/m; the organic filler is the mixed particles of rigid polyurethane with the particle diameter of 1.1mm, polystyrene foam and phenolic resin; the inorganic filler is a mixture of carbon nano tubes with the tube diameter of 37.5nm and the bulk density of 40kg/m, acicular wollastonite powder with the fineness of 500 meshes and sheet mica powder with the fineness of 450 meshes; the flame retardant is aluminum hydroxide; the dispersant is a special nano material dispersant; the water repellent is methyl potassium silicate; the curing agent is p-toluenesulfonic acid; the foaming agent is sodium dodecyl benzene sulfonate; the water solvent is deionized water.
Example 3
The embodiment provides an environment-friendly water-based nano thermal insulation material which comprises, by weight, 120 parts of cement paste, 3 parts of a dispersing agent, 5 parts of a water repellent, 5 parts of a flame retardant, 100 parts of silica nano aerogel, 80 parts of nano cellulose aerogel, 40 parts of vitrified micro bubbles, 10 parts of an inorganic filler, 120 parts of an organic filler, 15 parts of a foaming agent, 10 parts of a curing agent and 40 parts of a water solvent.
The silicon dioxide nano aerogel is 20nm in particle size and 60kg/m3 in bulk density; the particle size of the nano cellulose aerogel is 50nm, and the bulk density is 50 kg/m; the particle size of the vitrified micro bubbles is 50 mu m, and the bulk density is 200kg/m 3; the organic filler is the mixed particles of rigid polyurethane with the particle diameter of 2mm, polystyrene foam and phenolic resin; the inorganic filler is a mixture of carbon nanotubes with the tube diameter of 60nm and the bulk density of 65kg/m, acicular wollastonite powder with the fineness of 700 meshes and sheet mica powder with the fineness of 500 meshes; the flame retardant is aluminum hydroxide; the dispersant is a special nano material dispersant; the water repellent is an organic silicon water repellent; the curing agent is phenolsulfonic acid; the foaming agent is alpha-sodium alkenyl sulfonate; the water solvent is distilled water.
Example 4
In this embodiment, a method for preparing an environment-friendly water-based nano thermal insulation material is provided, which includes the following steps:
s1: weighing the raw materials in parts by weight;
s2: adding cement paste, a hydrosolvent, a dispersant, a flame retardant, a water repellent and a foaming agent into stirring equipment for stirring and mixing to ensure that the system is uniformly dispersed;
s3: then adding the silicon dioxide nano aerogel, the nano cellulose aerogel, the vitrified micro bubbles, the inorganic filler and the organic filler into stirring equipment, stirring for 10min at the speed of 200r/min,
s4: and finally, adding the stirred raw materials into a forming device for foaming and forming. The method is also used for site construction, and the stirred raw materials are driven into a space needing to be filled with heat insulation materials through a foaming machine.
Example 5
The embodiment provides a preparation method of an environment-friendly water-based nano insulation board, which comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: preparing a material A and a material B,
preparing a material A: adding cement paste, a hydrosolvent, a flame retardant, a water repellent and a foaming agent into stirring equipment, stirring and mixing to uniformly disperse a system, and then, preparing for later use.
Preparing a material B: adding cement paste, a hydrosolvent, a dispersant, a flame retardant, a water repellent and a foaming agent into stirring equipment for stirring and mixing to ensure that the system is uniformly dispersed; adding the silicon dioxide nano aerogel, the nano cellulose aerogel, the vitrified micro bubbles, the inorganic filler and the organic filler into stirring equipment, stirring for 10min at the speed of 200r/min, and then preparing for later use
S3: injecting the material A into a mold, forming a 1-10 mm inner layer on the bottom surface of the mold by the material A, injecting the material B into the mold when the inner layer is in a half-molding state, laying a 1-5 cm interlayer on the inner layer, injecting the material A into the mold when the interlayer is in a half-molding state, laying a 1-10 mm outer layer on the interlayer, and taking out after molding. And flame-retardant paint can be sprayed on the surface of the formed insulation board.
Example 6
The insulation board prepared in embodiment 5 is subjected to insulation detection:
selecting a common XPS insulation board and a common polyurethane insulation board on the market as a comparison group, selecting three insulation boards with consistent thicknesses as a test group, respectively selecting the three insulation boards to insulate heat, preparing a positive direction container with the same volume, adding warm water at about fifty degrees into the container, sealing the container, and arranging a temperature sensor in the container to detect the insulation effects of the three insulation boards, wherein the insulation effects are shown in table 1:
Figure BDA0003437764030000081
table 1: the value of the water temperature in each insulation board container changing with time
As can be seen from Table 1, the container formed by the heat-insulating plate has small heat-insulating change amplitude along with time and good heat-insulating effect.
Example 7
Referring to fig. 1 and fig. 2, the present embodiment provides an environment-friendly aqueous nano thermal insulation material to standby stirring apparatus, including a tank 100, a stirring mechanism 200 is installed in the tank 200, the stirring mechanism includes a scraping stirring component 210, a medium-speed dispersing stirring component 220 and a high-speed dispersing stirring component 230, the scraping stirring component 210 is used for scraping and stirring materials adhered to the side wall and the bottom of the tank 100, and the medium-speed dispersing stirring component 220 and the high-speed dispersing stirring component 230 are used for uniformly stirring and dispersing the materials.
Referring to fig. 3, the scraping and stirring assembly 210 includes a scraping and stirring shaft 211, the axial direction of the scraping and stirring shaft 211 is the same as the height direction of the tank 200, the scraping and stirring shaft 211 is arranged in the central region of the tank, a U-shaped bracket 212 is arranged on the scraping and stirring shaft 211, scraping blades 213 are arranged on the U-shaped bracket 212, the scraping blades 213 are spaced along the U-shaped direction of the U-shaped bracket 212, and the scraping blades are attached to the side walls and the bottom of the tank 100.
Referring to fig. 4, the medium speed dispersing and stirring assembly 220 includes a medium speed stirring shaft 221, the axial direction of the medium speed stirring shaft 221 is the same as the height direction of the tank 200, the discs 222 are arranged on the shaft body of the medium speed stirring shaft 221 at intervals up and down, the disc surfaces of the discs 222 are horizontally arranged, the outer ring of the discs 222 is provided with a guide blades 2223 a and a guide blades 224B, the guide blades 223 a and the guide blades 224B are staggered along the axial direction of the discs 222, the guide blades 223 a are used for guiding the material obliquely upward, and the guide blades 224B are used for guiding the material obliquely downward.
Referring to fig. 5, the high-speed dispersing and stirring assembly 230 includes a high-speed stirring shaft 231, the axial direction of the high-speed stirring shaft 231 is the same as the height direction of the tank 200, the high-speed stirring shaft 231 and the medium-speed stirring shaft 221 are located at both sides of the scraping and stirring shaft 211 and in the U-shaped area of the U-shaped bracket 212, dispersing blades 232 are distributed at intervals up and down on the shaft body of the high-speed stirring shaft 231, the dispersing blades 232 are formed by two semi-circular blade portions, the blade portions are arranged along the axial direction of the high-speed stirring shaft 231, and the openings of the two blade portions are arranged oppositely.
The upper end of the tank body 100 is provided with a feeding hole, cement paste, a hydrosolvent, a dispersing agent, a flame retardant, a water repellent and a foaming agent are firstly added into the tank body from the feeding hole, at this time, the scraping stirring shaft 211 and the medium-speed stirring shaft are started, so that all materials are fully stirred and mixed, then, the silica nano aerogel, the nano cellulose aerogel, the vitrified micro bubbles, the inorganic filler and the organic filler are added into the tank body 100, the medium-speed stirring shaft 221 is stirred for 10min at the speed of 200r/min, finally, the high-speed stirring shaft 231 is started, high-speed stirring is carried out, so that the system can be filled with tiny bubbles, and finally, the stirred raw materials are added into a forming device and are subjected to heating foaming forming.
The heat-insulating material provided by the invention has the advantages of nano heat-insulating property, good fireproof and waterproof effects, realization of waste recycling, environmental protection, reliability and wide application in building heat-insulating engineering.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims (10)

1. An environmental protection aqueous nanometer thermal insulation material is characterized in that: the building material comprises, by weight, 80-120 parts of cement slurry, 1-3 parts of a dispersing agent, 2-5 parts of a water repellent, 3-5 parts of a flame retardant, 50-100 parts of silica nano aerogel, 40-80 parts of nano cellulose aerogel, 20-40 parts of vitrified micro bubbles, 5-10 parts of an inorganic filler, 80-120 parts of an organic filler, 8-15 parts of a foaming agent, 5-10 parts of a curing agent and 20-40 parts of a water solvent.
2. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the mortar comprises the following raw materials, by weight, 100 parts of cement slurry, 2 parts of a dispersing agent, 3.5 parts of a water repellent, 4 parts of a flame retardant, 75 parts of silica nano aerogel, 60 parts of nano cellulose aerogel, 30 parts of vitrified micro bubbles, 7.5 parts of an inorganic filler, 100 parts of an organic filler, 11.5 parts of a foaming agent, 7.5 parts of a curing agent and 30 parts of a hydrosolvent.
3. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the silicon dioxide nano aerogel has the particle size of 10-20 nm and the bulk density of 40-60 kg/m3The silica aerogel of (1).
4. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the nano cellulose aerogel has a particle size of 20-50 nm and a bulk density of 20-50 kg/m3。
5. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the particle diameter of the vitrified micro bubbles is 20-50 mu m, and the bulk density is 100-3。
6. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the particle size of the organic filler is 0.2-2 mm.
7. The environment-friendly water-based nano thermal insulation material according to claim 6, characterized in that: the organic filler is one or more of polystyrene foam, rigid polyurethane or phenolic resin.
8. The environment-friendly water-based nano thermal insulation material according to claim 1, characterized in that: the inorganic filler is one or more of carbon nano tube, wollastonite powder and mica powder.
9. A preparation method of an environment-friendly water-based nano thermal insulation material is characterized by comprising the following steps: the method comprises the following steps:
s1: weighing the raw materials in parts by weight;
s2: adding cement paste, a hydrosolvent, a dispersant, a flame retardant, a water repellent and a foaming agent into stirring equipment for stirring and mixing to ensure that the system is uniformly dispersed;
s3: then adding the silicon dioxide nano aerogel, the nano cellulose aerogel, the vitrified micro bubbles, the inorganic filler and the organic filler into stirring equipment, stirring for 10min at the speed of 200r/min,
s4: and finally, adding the stirred raw materials into a forming device for foaming and forming.
10. The utility model provides an environmental protection aqueous nanometer insulation material to reserve agitated vessel which characterized in that: the material scraping and stirring tank comprises a tank body (100), wherein a stirring mechanism (200) is arranged in the tank body (200), the stirring mechanism comprises a material scraping and stirring component (210), a medium-speed dispersing and stirring component (220) and a high-speed dispersing and stirring component (230), the material scraping and stirring component (210) is used for scraping and stirring materials bonded on the side wall and the bottom of the tank body (100), and the medium-speed dispersing and stirring component (220) and the high-speed dispersing and stirring component (230) are used for uniformly stirring and dispersing the materials.
CN202111648063.4A 2021-12-28 2021-12-28 Environment-friendly water-based nano thermal insulation material and preparation method thereof Pending CN114230254A (en)

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