CN113416020A - Wall heat insulation slurry and preparation method thereof - Google Patents
Wall heat insulation slurry and preparation method thereof Download PDFInfo
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- CN113416020A CN113416020A CN202110582210.6A CN202110582210A CN113416020A CN 113416020 A CN113416020 A CN 113416020A CN 202110582210 A CN202110582210 A CN 202110582210A CN 113416020 A CN113416020 A CN 113416020A
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/22—Glass ; Devitrified glass
- C04B14/24—Glass ; Devitrified glass porous, e.g. foamed glass
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
- C04B16/082—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons other than polystyrene based, e.g. polyurethane foam
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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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0071—Phase-change materials, e.g. latent heat storage materials used in concrete compositions
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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
- 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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- 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
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- Chemical & Material Sciences (AREA)
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Abstract
A wall heat insulation slurry is composed of the following raw materials by weight percent: 15-25% of aerogel compound, 22-28% of vitrified micro bubbles, 5-10% of polymer emulsion, 12-20% of heavy calcium carbonate powder, 3-6% of barium sulfate, 2-4% of modifier, 1-2% of flame retardant, 0.3-0.5% of wetting agent and the balance of water; the aerogel compound is added in the formula, the preparation process of the aerogel is optimized, the dry density of the slurry can be reduced, the phase-change material and the polystyrene microspheres serving as modifiers are added in the preparation process, the phase-change material and the polystyrene microspheres can be doped into a fragile network system of the aerogel while the heat insulation performance of the slurry is improved, the structural continuity of the aerogel is improved, and the phase-change material and the polystyrene microspheres filled in the aerogel can cooperatively maintain higher heat insulation and heat storage capacities relative to gaps in the aerogel; the strength of the aerogel can be improved to a certain extent by adding the polystyrene microspheres.
Description
Technical Field
The invention relates to the technical field of engineering materials, in particular to a wall heat insulation slurry and a preparation method thereof.
Background
Building energy consumption becomes one of the most important energy consumption units in China, and accounts for about 30% of the total social energy consumption, wherein 60% of energy loss is caused by building walls. Therefore, one important measure for building energy conservation is to perform energy-saving technical transformation and innovation on the wall; reducing the heat transfer coefficient of the building envelope wall is one of the main measures and effective measures for building energy conservation, wherein the addition of a heat-insulating material is the first measure for reducing the heat transfer coefficient; according to the properties of materials, the materials currently applied in the field of wall heat preservation and insulation at home and abroad are mainly divided into two categories: organic thermal insulation materials and inorganic thermal insulation materials; the organic heat-insulating material mainly comprises a foamed polystyrene board, an extruded polystyrene board, sprayed polyurethane, polystyrene particles and the like, although the light heat insulation can be realized, the most outstanding problems of the products are flammability, aging resistance (heat-insulating property attenuation) and toxicity, and the problems directly endanger the life and property safety of people, environment protection and social stability; compared with organic heat insulation materials, the inorganic heat insulation material has high fire-proof grade, strong fire resistance, difficult deformation and good stability, is firmly bonded with the wall base surface and the plastering layer in the construction process, and rarely has the phenomenon of hollowing and cracking; however, the conventional inorganic heat insulating material still has the defects of large dry density, slightly poor heat insulating performance and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a wall heat insulation slurry which is prepared from the following raw materials in percentage by weight: 5-25% of aerogel compound, 22-40% of vitrified micro bubbles, 5-10% of polymer emulsion, 12-20% of heavy calcium carbonate powder, 3-6% of barium sulfate, 2-4% of modifier, 1-2% of flame retardant, 0.3-0.5% of wetting agent and the balance of water;
wherein, the preparation of the aerogel composite comprises the following steps: (a) tetraethoxysilane is taken as a silicon source, added with styrene and an initiator to be uniformly stirred to be taken as an oil phase, and added with 2mol/L hydrochloric acid solution to be emulsified for 20-30min at the rotating speed of 2000-3000rpm/min to obtain an emulsion; wherein, the mol ratio of tetraethoxysilane, styrene, initiator and water is 1 (0.5-0.8) to (0.01-0.03) to (3-8); (b) adding the phase-change material into the emulsion obtained in the step (a), stirring for 10-20min to uniformly disperse the phase-change material in the emulsion, adding ethanol for aging for multiple times, wherein the aging time is 5-8h each time, and replacing the raw material and water in the system; wherein, the phase-change material accounts for 1-3% of the mass of the emulsion; (c) and drying the aged gel in an oven for 24-48h to obtain the aerogel composite.
Preferably, the material consists of the following raw materials in percentage by weight: 7% of aerogel compound, 38% of vitrified micro bubbles, 8% of polymer emulsion, 13% of heavy calcium powder, 4% of barium sulfate, 3% of modifier, 1.2% of flame retardant, 0.4% of wetting agent and the balance of water.
Preferably, the modifier is polystyrene microspheres.
Preferably, the particle size of the vitrified micro bubbles is 90-125 μm.
Preferably, the phase-change material is a mixture of methyl stearate and ethyl stearate mixed in a mass ratio of 1 (0.5-1.0).
Preferably, the polymer emulsion is a basf S400F emulsion.
Preferably, the flame retardant is selected from any one of polytetrafluoroethylene micro powder, aluminum hydroxide and magnesium hydroxide.
Preferably, the particle size of the polystyrene microsphere is 0.1-1 μm.
The preparation method of the wall heat insulation slurry comprises the following steps:
(1) weighing 1/2-2/3 formula amount of water according to the weight parts, then adding the vitrified micro bubbles, the polymer emulsion, the heavy calcium powder, the barium sulfate, the modifier, the flame retardant and the wetting agent, and stirring and mixing uniformly;
(2) adding the weighed aerogel compound into the step (1) while stirring, continuously stirring, adding the rest formula amount of water, and uniformly stirring and mixing to obtain the elastic heat-insulation slurry.
Compared with the prior art, the invention has the beneficial effects that:
(1) the aerogel compound is added in the formula, the preparation process of the aerogel is optimized, the dry density of the slurry can be reduced, the phase-change material and the polystyrene microspheres serving as modifiers are added in the preparation process, the phase-change material and the polystyrene microspheres can be doped into a fragile network system of the aerogel while the heat insulation performance of the slurry is improved, the structural continuity of the aerogel is improved, and the phase-change material and the polystyrene microspheres filled in the aerogel can cooperatively maintain higher heat insulation and heat storage capacities relative to gaps in the aerogel; the strength of the aerogel can be improved to a certain extent by adding the polystyrene microspheres;
(2) the polymer emulsion and the calcined kaolin are added into the system, so that the cohesive force of slurry is improved, the slurry can be quickly condensed, and has stronger cohesive strength with a base material, up to 0.15MPa, and the propyl benzene emulsion of Basff is adopted, so that the cured strength is higher, the product has better toughness, and the product is not easy to crack and fall off after being put on a wall;
(3) the slurry has good heat insulation performance, and the vitrified micro bubbles are added, so that the heat conductivity coefficient of the obtained slurry is less than 0.043W/(m.K), and the slurry has good flame retardance;
(4) the invention has better construction performance, can replace the existing inorganic heat-insulating slurry system and can be widely applied to the energy-saving field of building interior walls, and meanwhile, the aerogel is a material with the lowest heat conductivity coefficient and has better stability and controllability.
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.
Examples 1-5 include the components and corresponding parts by weight shown in table 1;
TABLE 1
Wherein, the modifier is polystyrene microsphere; the grain diameter of the vitrified micro bubbles is 90-125 μm; the polymer emulsion adopts a basf S400F emulsion; the flame retardant is selected from any one of polytetrafluoroethylene micro powder, aluminum hydroxide and magnesium hydroxide; the particle size of the polystyrene microsphere is 0.1-1 μm.
The preparation method of the elastic heat-insulation slurry comprises the following steps:
(1) the preparation of the aerogel composite comprises the following steps: (a) tetraethoxysilane is taken as a silicon source, added with styrene and an initiator to be uniformly stirred to be taken as an oil phase, and added with 2mol/L hydrochloric acid solution to be emulsified for 20-30min at the rotating speed of 2000-3000rpm/min to obtain an emulsion; wherein, the mol ratio of tetraethoxysilane, styrene, initiator and water is 1 (0.5-0.8) to (0.01-0.03) to (3-8); (b) adding the phase-change material into the emulsion obtained in the step (a), stirring for 10-20min to uniformly disperse the phase-change material in the emulsion, adding ethanol for aging for multiple times, wherein the aging time is 5-8h each time, and replacing the raw material and water in the system; wherein, the phase-change material accounts for 1-3% of the mass of the emulsion; (c) drying the aged gel in an oven for 24-48h to obtain the aerogel composite;
(2) weighing 1/2-2/3 formula amount of water according to the weight parts, then adding the vitrified micro bubbles, the polymer emulsion, the heavy calcium powder, the barium sulfate, the modifier, the flame retardant and the wetting agent, and stirring and mixing uniformly;
(3) adding the weighed aerogel compound into the step (2) while stirring, continuously stirring, adding the rest formula amount of water, and uniformly stirring and mixing to obtain the elastic heat-insulation slurry;
in the technical scheme, the phase-change material is a mixture of methyl stearate and ethyl stearate which are mixed according to the mass ratio of 1 (0.5-1.0);
in example 1, the molar ratio of tetraethoxysilane, styrene, initiator and water is 1:0.6:0.01: 4; the phase change material is a mixture of methyl stearate and ethyl stearate which are mixed in a mass ratio of 1: 0.6; the phase-change material accounts for 2% of the mass of the emulsion;
in example 2, the molar ratio of tetraethoxysilane, styrene, initiator and water is 1:0.5:0.02: 5; the phase change material is a mixture of methyl stearate and ethyl stearate which are mixed in a mass ratio of 1: 0.8; the phase-change material accounts for 3% of the mass of the emulsion;
in example 3, the molar ratio of tetraethoxysilane, styrene, initiator and water is 1:0.8:0.03: 5; the phase change material is a mixture of methyl stearate and ethyl stearate which are mixed in a mass ratio of 1: 0.6; the phase-change material accounts for 1% of the mass of the emulsion;
in example 4, the molar ratio of tetraethoxysilane, styrene, initiator and water is 1:0.8:0.01: 6; the phase change material is a mixture of methyl stearate and ethyl stearate which are mixed in a mass ratio of 1: 0.9; the phase-change material accounts for 3% of the mass of the emulsion;
in example 5, the molar ratio of tetraethoxysilane, styrene, initiator and water is 1:0.7:0.02: 4; the phase change material is a mixture of methyl stearate and ethyl stearate which are mixed in a mass ratio of 1: 1.0; the phase-change material accounts for 2.5 percent of the mass of the emulsion;
performance verification
The examples 1 to 5 were subjected to the performance test, and the results are shown in Table 2.
TABLE 2
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The heat insulation and heat preservation slurry for the wall is characterized by comprising the following raw materials in percentage by weight: 5-25% of aerogel compound, 22-40% of vitrified micro bubbles, 5-10% of polymer emulsion, 12-20% of heavy calcium carbonate powder, 3-6% of barium sulfate, 2-4% of modifier, 1-2% of flame retardant, 0.3-0.5% of wetting agent and the balance of water;
wherein, the preparation of the aerogel composite comprises the following steps: (a) tetraethoxysilane is taken as a silicon source, added with styrene and an initiator to be uniformly stirred to be taken as an oil phase, and added with 2mol/L hydrochloric acid solution to be emulsified for 20-30min at the rotating speed of 2000-3000rpm/min to obtain an emulsion; wherein, the mol ratio of tetraethoxysilane, styrene, initiator and water is 1 (0.5-0.8) to (0.01-0.03) to (3-8); (b) adding the phase-change material into the emulsion obtained in the step (a), stirring for 10-20min to uniformly disperse the phase-change material in the emulsion, adding ethanol for aging for multiple times, wherein the aging time is 5-8h each time, and replacing the raw material and water in the system; wherein, the phase-change material accounts for 1-3% of the mass of the emulsion; (c) and drying the aged gel in an oven for 24-48h to obtain the aerogel composite.
2. The wall thermal insulation and heat preservation slurry as claimed in claim 1, which is characterized by comprising the following raw materials in percentage by weight: 7% of aerogel compound, 38% of vitrified micro bubbles, 8% of polymer emulsion, 13% of heavy calcium powder, 4% of barium sulfate, 3% of modifier, 1.2% of flame retardant, 0.4% of wetting agent and the balance of water.
3. The wall thermal insulation slurry as claimed in claim 1, wherein the modifier is polystyrene microspheres.
4. The heat insulating and preserving slurry for walls as claimed in claim 1, wherein the vitrified micro bubbles have a particle size of 90-125 μm.
5. The wall thermal insulation slurry as claimed in claim 1, wherein the phase change material is a mixture of methyl stearate and ethyl stearate mixed in a mass ratio of 1 (0.5-1.0).
6. The wall thermal insulation slurry as claimed in claim 1, wherein the polymer emulsion is a basf S400F emulsion.
7. The wall thermal insulation slurry according to claim 1, wherein the flame retardant is any one of polytetrafluoroethylene micropowder, aluminum hydroxide and magnesium hydroxide.
8. The wall thermal insulation slurry as claimed in claim 3, wherein the polystyrene microspheres have a particle size of 0.1-1 μm.
9. The method for preparing the wall thermal insulation slurry according to any one of claims 1 or 8, which is characterized by comprising the following steps:
(1) weighing 1/2-2/3 formula amount of water according to the weight parts, then adding the vitrified micro bubbles, the polymer emulsion, the heavy calcium powder, the barium sulfate, the modifier, the flame retardant and the wetting agent, and stirring and mixing uniformly;
(2) adding the weighed aerogel compound into the step (1) while stirring, continuously stirring, adding the rest formula amount of water, and uniformly stirring and mixing to obtain the elastic heat-insulation slurry.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106674A (en) * | 2021-10-30 | 2022-03-01 | 江苏特友诺新材料科技有限公司 | High-permeability inner wall heat-insulation waterproof slurry for renovation of old houses |
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| CN105199472A (en) * | 2015-09-18 | 2015-12-30 | 南京逸柔蒂雯新材料科技有限公司 | Preparation method of aerogel-based heat-insulation phase change coating |
| CN106045554A (en) * | 2016-05-30 | 2016-10-26 | 南京工业大学 | Phase-change material doped SiO2 aerogel composite heat-insulating material and preparation method thereof |
| CN112266198A (en) * | 2020-09-17 | 2021-01-26 | 江苏特友诺新材料科技有限公司 | Elastic heat-insulating slurry and preparation method thereof |
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- 2021-05-27 CN CN202110582210.6A patent/CN113416020A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105199472A (en) * | 2015-09-18 | 2015-12-30 | 南京逸柔蒂雯新材料科技有限公司 | Preparation method of aerogel-based heat-insulation phase change coating |
| CN106045554A (en) * | 2016-05-30 | 2016-10-26 | 南京工业大学 | Phase-change material doped SiO2 aerogel composite heat-insulating material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106674A (en) * | 2021-10-30 | 2022-03-01 | 江苏特友诺新材料科技有限公司 | High-permeability inner wall heat-insulation waterproof slurry for renovation of old houses |
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Application publication date: 20210921 |
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