CN114560665A - Phase-change thermal-insulation facing mortar for building interior wall and preparation method thereof - Google Patents

Phase-change thermal-insulation facing mortar for building interior wall and preparation method thereof Download PDF

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CN114560665A
CN114560665A CN202210358428.8A CN202210358428A CN114560665A CN 114560665 A CN114560665 A CN 114560665A CN 202210358428 A CN202210358428 A CN 202210358428A CN 114560665 A CN114560665 A CN 114560665A
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facing mortar
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mortar
expanded perlite
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CN114560665B (en
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董国胜
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Wuhan Zhigao Environmental Technology Co ltd
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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
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B14/08—Diatomaceous earth
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/14—Minerals of vulcanic origin
    • C04B14/18—Perlite
    • C04B14/185—Perlite expanded
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/301—Oxides other than silica porous or hollow
    • C04B14/302—Aerogels
    • 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
    • C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
    • 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
    • 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
    • C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
    • C04B24/42—Organo-silicon compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • 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
    • 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
    • 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
    • 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
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/90—Passive houses; Double facade technology

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Building Environments (AREA)

Abstract

The invention provides phase change thermal insulation facing mortar for building interior walls, which comprises the following raw materials in parts by weight: 60 parts of ordinary portland cement, 8-12 parts of diatomite, 20-30 parts of heavy calcium carbonate, 5-10 parts of an admixture, 1-3 parts of redispersible latex powder, 0.5-1.5 parts of cellulose ether, 20-40 parts of a phase change material, 0.5-1.4 parts of a waterproof agent and 1-3 parts of a pigment. In addition, the invention also provides a method for preparing the facing mortar, which comprises the following steps: s1, preparing the components according to the proportion; and S2, uniformly mixing the components. The prepared facing mortar has various properties meeting the facing mortar standard, and has the characteristics of heat preservation, high mechanical strength, water resistance, bright color and the like.

Description

Phase-change thermal-insulation facing mortar for building interior wall and preparation method thereof
Technical Field
The invention relates to the technical field of facing mortar, in particular to phase-change heat-insulation facing mortar for building interior walls and a preparation method thereof.
Background
The traditional inner wall surface decoration needs procedures of leveling mortar and plastering, putty coating, coating and the like, the contraction and expansion stress of a plurality of layers of different materials are inconsistent, the layers are easy to peel off, the internal stress is different due to temperature difference, and hollowing, water leakage or falling off of each layer occurs; when in updating, the mortar on the inner layer and the coating on the outer layer need to be updated completely, and a large amount of construction waste is generated. The facing mortar is a novel environment-friendly decorative material, can have good cohesiveness with various base planes (concrete, cement mortar and the like), has uniform internal tension due to a single-layer structure, and does not have the problems of cracks, cracks and layered falling; after long-term use, the decorative mortar can be updated by adopting a thin layer of new decorative mortar, no construction waste is generated during updating, and the decorative mortar meets the development trend requirements of safety, environmental protection and energy conservation due to the characteristics of natural color texture, soft vision, low cost, easy construction and the like, and is widely applied to the decoration and protection of the surface of the inner wall of a building.
With the development of the building industry, the demand for finishing mortar on the surface of the inner wall of a building is more and more diversified, and for example, the heat insulation property becomes one of the common additional properties of the finishing mortar for the inner wall of the building. Phase change materials such as fatty acid are hot spots in the field of energy-saving building material research in recent years, and are often added into building interior wall facing mortar with high requirements on heat preservation. However, in the prior art, the phase change material is often mixed into the facing mortar to cause the mechanical strength of the facing mortar to be greatly reduced, and meanwhile, the problem that the phase change material is easy to leak exists.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides phase change thermal insulation facing mortar for building interior walls, which comprises the following raw materials in parts by weight:
Figure BDA0003583911460000011
Figure BDA0003583911460000021
further, the preparation method of the phase-change material comprises the following steps:
s1, mixing a silane coupling agent, polyacrylic acid and water, adjusting the pH value to 5.5, adding expanded perlite, reacting at 80 ℃ for 2 hours, and then filtering, washing and drying to obtain polyacrylic acid-expanded perlite;
s2, submerging the polyacrylic acid-expanded perlite in a mixed liquid of liquid n-decanoic acid and alcohol, then carrying out adsorption treatment, and then carrying out drying treatment to obtain the phase-change material.
Further, in step S2, the flooding manner is: pouring the polyacrylic acid-expanded perlite into a three-neck flask, and slowly dripping the mixed liquid of the liquid n-decanoic acid and the alcohol into the three-neck flask until the polyacrylic acid-expanded perlite is submerged; the adsorption treatment comprises the following steps: and (3) vacuumizing the three-neck flask, heating in a constant-temperature water bath, and charging air for adsorption, wherein the adsorption time is 2 hours, and the temperature of the constant-temperature water bath is 70 ℃. The polyacrylic acid is grafted on the surface of the expanded perlite, and is not loaded in the expanded perlite, so that the porous structure in the expanded perlite can be reserved, and the porous structure is convenient for adsorbing the phase change material n-decanoic acid; the vacuum treatment can reduce the air pressure in the pores of the expanded perlite, after the vacuum degree is reduced, the air pressure difference is formed inside and outside the expanded perlite, so that the n-decanoic acid enters the pores of the expanded perlite, and the n-decanoic acid adsorbed in the pores of the expanded perlite is not easy to flow out due to the capillary action.
Further, in step S1, the weight ratio of the silane coupling agent, the polyacrylic acid, the water and the expanded perlite is 1.5:0.8:14:1, and in step S2, the weight ratio of the liquid n-decanoic acid, the alcohol and the polyacrylic acid-expanded perlite is 1.1:2.1: 1.
Further, the admixture comprises aluminum-vanadium soil powder and rice hull powder.
Further, the waterproof agent is polydimethylsiloxane.
Further, the pigment is an inorganic pigment.
In addition, the invention also provides a method for preparing the phase change thermal insulation facing mortar for the building interior wall, which comprises the following steps:
s1, preparing raw materials, namely preparing ordinary portland cement, diatomite, ground limestone, an admixture, redispersible latex powder, cellulose ether, a phase-change material, a waterproof agent and a pigment according to a ratio;
s2, uniformly mixing the raw materials in the step S1 to obtain the facing mortar.
When the decorative mortar is used, the decorative mortar and water are uniformly stirred according to the weight ratio of 1:0.3 to obtain slurry, and the slurry is coated on the surface of the building inner wall to form a decorative layer. The prepared facing mortar has various properties meeting the facing mortar standard, and has the characteristics of good heat preservation performance, high mechanical strength, good waterproof performance, bright color and the like.
The phase change material is used in the facing mortar, so that the heat insulation performance of the facing mortar can be effectively improved. The expanded perlite is used as an adsorption carrier of the phase change material, and a large amount of the phase change material n-decanoic acid can be effectively and reliably stored, so that the phase change material is adsorbed and encapsulated in the porous material, and the leakage problem of the phase change material when the phase change material is combined with facing mortar is avoided; the silane coupling agent is used to support a 'molecular bridge' between the interfaces of inorganic substances and organic substances, and the two materials with different properties are connected together to improve the performance of the composite material and increase the bonding strength.
The diatomite has the characteristics of large porosity, light weight, heat insulation and wear resistance, and is beneficial to improving the heat preservation performance of the facing mortar, the main component of the diatomite is silicon dioxide, and the diatomite can react with calcium hydroxide generated in the hydration process of common portland cement to form a cementing material, so that the adhesiveness of the facing mortar can be improved. The rice hull powder is rich in lignin and silicon dioxide, the lignin is a biopolymer which is formed by connecting 3 phenylpropane units through ether bonds and carbon-carbon bonds and has a three-dimensional net structure, and contains a plurality of negative electricity groups, so that positively charged particles can be adsorbed to bond components in the facing mortar, the bonding strength of the facing mortar is improved, and the silicon dioxide can react with calcium hydroxide generated in the hydration process of ordinary portland cement to form a cementing material, so that the bonding force of the facing mortar is further improved.
The aluminum-vanadium-soil powder has small expansion coefficient, high refractoriness and good chemical stability, and can improve the fire resistance of the facing mortar; the redispersible latex powder has extremely outstanding bonding strength, can improve the adhesive bonding property, the breaking strength, the waterproofness, the plasticity, the wear resistance and the workability of the facing mortar, and can also improve the crack resistance and the shrinkage performance of the facing mortar. The polydimethylsiloxane has good weather resistance, can improve the waterproof performance of the facing mortar, and can ensure that the color of the facing mortar is bright.
Detailed Description
For better understanding of the present invention, the following examples are given for further illustration of the present invention, but the present invention is not limited to the following examples.
Examples 1 to 4:
embodiments 1 to 4 provide phase change thermal insulation facing mortar for building interior walls, which comprises the following components in parts by weight as shown in table 1 below; wherein the waterproof agent is polydimethylsiloxane, and the pigment is an inorganic pigment; the phase change temperature of the phase change material is 29-31 ℃; the preparation method of the phase-change material comprises the following steps:
s1, mixing a silane coupling agent, polyacrylic acid and water, adjusting the pH value to 5.5, adding expanded perlite, reacting at 80 ℃ for 2 hours, and then filtering, washing and drying to obtain polyacrylic acid-expanded perlite;
s2, submerging the polyacrylic acid-expanded perlite in a mixed liquid of liquid n-decanoic acid and alcohol, then carrying out adsorption treatment, and then carrying out drying treatment to obtain the phase-change material.
Specifically, in step S2, the flooding manner is: pouring the polyacrylic acid-expanded perlite into a three-neck flask, and slowly dripping the mixed liquid of the liquid n-decanoic acid and the alcohol into the three-neck flask until the polyacrylic acid-expanded perlite is submerged; the adsorption treatment comprises the following steps: and (3) vacuumizing the three-neck flask, heating in a constant-temperature water bath, and charging air for adsorption, wherein the adsorption time is 2 hours, and the temperature of the constant-temperature water bath is 70 ℃. In the step S1, the weight ratio of the silane coupling agent, the polyacrylic acid, the water, and the expanded perlite is 1.5:0.8:14:1, and in the step S2, the weight ratio of the liquid n-decanoic acid, the alcohol, and the polyacrylic acid-expanded perlite is 1.1:2.1: 1.
TABLE 1
Figure BDA0003583911460000041
Figure BDA0003583911460000051
The method for preparing the fireproof thermal insulation facing mortar comprises the following steps:
s1, preparing raw materials, namely preparing ordinary portland cement, diatomite, ground limestone, an admixture, redispersible latex powder, cellulose ether, a phase-change material, a waterproof agent and a pigment according to a ratio;
s2, uniformly mixing the raw materials in the step S1 to obtain the facing mortar.
During construction, the facing mortar and water are uniformly stirred according to the weight ratio of 1:0.3 to obtain slurry, and the slurry is coated on the surface of the building inner wall to form a decorative layer.
Mechanical property test:
the facing mortar prepared in the embodiments 1 to 4 is mixed, stirred uniformly and kept stand for 5 minutes according to the weight ratio of the facing mortar to water of 1:0.3, and then a sample is formed according to the standard requirement. The correlation performance is measured according to the standard of the wall facing mortar basic performance test method JCT 1024-2019, and the results are shown in the following table 2.
TABLE 2
Figure BDA0003583911460000052
As can be seen from the performance test results in Table 2, the prepared facing mortar has stronger flexural strength, compressive strength and bonding strength.
Testing the heat preservation performance:
the facing mortar prepared in the examples 1 to 4 is mixed and stirred uniformly according to the weight ratio of the facing mortar to water of 1:0.3 to obtain slurry, the slurry is poured into a standard test mold of 70.7mm × 70.7mm × 70.7mm, the test mold is vibrated until cement slurry appears on the surface of the slurry, then slurry overflowing from the edge is scraped off, the slurry is molded after two days, then the mold is removed, the slurry is placed into a standard curing room for curing for 28 days to obtain a mortar test block required by the test, and after drying, a Hot Disk TPS2500S thermal conductivity tester (a probe C5501) is used for testing, and the results are shown in the following table 3.
TABLE 3
Coefficient of thermal conductivity (W/m. K)
Example 1 0.776
Example 2 0.547
Example 3 0.479
Example 4 0.431
From the results in table 3, it can be seen that the facing mortar prepared by the present invention has a low thermal conductivity, which indicates that the facing mortar prepared by the present invention is not easy to conduct heat, and further has a good thermal insulation property.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. The phase change thermal insulation facing mortar for the building inner wall is characterized by comprising the following raw materials in parts by weight:
Figure FDA0003583911450000011
2. the phase-change thermal insulation facing mortar for building interior walls according to claim 1, wherein the preparation method of the phase-change material comprises the following steps:
s1, mixing a silane coupling agent, polyacrylic acid and water, adjusting the pH value to 5.5, adding expanded perlite, reacting at 80 ℃ for 2 hours, and then filtering, washing and drying to obtain polyacrylic acid-expanded perlite;
s2, submerging the polyacrylic acid-expanded perlite in a mixed solution of liquid n-decanoic acid and alcohol, then carrying out adsorption treatment, and then carrying out drying treatment to obtain the phase change material.
3. The phase change insulation finishing mortar for building interior walls according to claim 2, wherein in the step S2, the flooding manner is: pouring the polyacrylic acid-expanded perlite into a three-neck flask, and slowly dripping the mixed liquid of the liquid n-decanoic acid and the alcohol into the three-neck flask until the polyacrylic acid-expanded perlite is submerged; the adsorption treatment comprises the following steps: and (3) vacuumizing the three-neck flask, heating in a constant-temperature water bath, and filling air for adsorption, wherein the adsorption time is 2 hours, and the temperature of the constant-temperature water bath is 70 ℃.
4. The phase change insulation facing mortar for building interior walls according to claim 2, wherein in step S1, the weight ratio of the silane coupling agent, polyacrylic acid, water and expanded perlite is 1.5:0.8:14:1, and in step S2, the weight ratio of the liquid n-decanoic acid, alcohol and polyacrylic acid-expanded perlite is 1.1:2.1: 1.
5. The phase-change insulation facing mortar for building interior walls according to claim 1, wherein the admixture comprises bauxite powder and rice hull powder.
6. The phase-change insulation finishing mortar for building interior walls according to claim 1, wherein the water repellent is polydimethylsiloxane.
7. The phase change insulation finishing mortar for building interior walls according to claim 1, wherein the pigment is an inorganic pigment.
8. A method for preparing the phase change insulation finishing mortar for building interior walls according to any one of claims 1 to 7, comprising the steps of:
s1, preparing raw materials, namely preparing ordinary portland cement, diatomite, ground limestone, an admixture, redispersible latex powder, cellulose ether, a phase-change material, a waterproof agent and a pigment according to a ratio;
s2, uniformly mixing the raw materials in the step S1 to obtain the facing mortar.
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