CN114230229A - Calcium chloride hexahydrate composite phase change thermal insulation mortar - Google Patents
Calcium chloride hexahydrate composite phase change thermal insulation mortar Download PDFInfo
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- CN114230229A CN114230229A CN202111644721.2A CN202111644721A CN114230229A CN 114230229 A CN114230229 A CN 114230229A CN 202111644721 A CN202111644721 A CN 202111644721A CN 114230229 A CN114230229 A CN 114230229A
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- chloride hexahydrate
- calcium chloride
- phase change
- energy storage
- mortar
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- QHFQAJHNDKBRBO-UHFFFAOYSA-L calcium chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ca+2] QHFQAJHNDKBRBO-UHFFFAOYSA-L 0.000 title claims abstract description 49
- 230000008859 change Effects 0.000 title claims abstract description 38
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 title claims abstract description 15
- 229940047908 strontium chloride hexahydrate Drugs 0.000 claims abstract description 32
- AMGRXJSJSONEEG-UHFFFAOYSA-L strontium dichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Sr]Cl AMGRXJSJSONEEG-UHFFFAOYSA-L 0.000 claims abstract description 32
- 238000004146 energy storage Methods 0.000 claims abstract description 28
- 239000011232 storage material Substances 0.000 claims abstract description 27
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 16
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 16
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 239000012782 phase change material Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002803 fossil fuel Substances 0.000 abstract description 2
- 239000002667 nucleating agent Substances 0.000 description 28
- 239000000463 material Substances 0.000 description 22
- 239000000203 mixture Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- 238000001816 cooling Methods 0.000 description 12
- 238000004781 supercooling Methods 0.000 description 12
- 239000004115 Sodium Silicate Substances 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
- 229910052911 sodium silicate Inorganic materials 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- CYPRMUMKDSHJER-UHFFFAOYSA-N O.O.O.O.O.O.O.O.O.[Na] Chemical compound O.O.O.O.O.O.O.O.O.[Na] CYPRMUMKDSHJER-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- PHIQPXBZDGYJOG-UHFFFAOYSA-N sodium silicate nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-][Si]([O-])=O PHIQPXBZDGYJOG-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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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
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
-
- 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
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives 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
- 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
-
- 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
Abstract
The invention discloses composite phase change thermal insulation mortar containing calcium chloride hexahydrate, which comprises mortar and is characterized in that 5-30 wt% of phase change energy storage material is also included in the mortar, the phase change energy storage material comprises calcium chloride hexahydrate, strontium chloride hexahydrate and sodium carboxymethyl cellulose, and the weight ratio of the calcium chloride hexahydrate: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85-99: 1-10: 1-5. The composite phase change material is added into the heat-insulating mortar, so that the heat-insulating performance of the mortar is greatly improved, a good living environment is provided for organisms in a greenhouse, the use of fossil fuels is reduced, energy is saved, and the construction process of ecological rural areas is promoted.
Description
Technical Field
The invention relates to the field of building materials, in particular to calcium chloride hexahydrate composite phase change thermal insulation mortar.
Background
The thermal insulation mortar is a building material which takes various light materials as aggregate, takes cement as cementing material, is mixed with some modified additives, and is used for constructing a building surface thermal insulation layer after being stirred and mixed.
The phase-change energy storage technology is an effective means for improving the utilization efficiency of energy by absorbing or releasing a large amount of heat energy in the phase-change process of materials so as to play a role in controlling temperature and storing energy, solving the contradiction that the energy supply and demand are unbalanced in time and space distribution. The phase change energy storage material is the core of the phase change technology, can realize the storage of the waste heat energy, can store the heat energy converted by solar energy in the form of latent heat in the daytime, can continuously and slowly release the latent heat during the temperature reduction, can slow down the loss of the heat energy, and can fully utilize the solar energy to reduce the consumption of the non-renewable energy.
The phase change energy storage material is combined with the thermal insulation mortar, and is pertinently applied to the greenhouse, so that the heat energy converted from solar energy in the daytime can be fully utilized, the waste of energy is avoided, meanwhile, the temperature in the greenhouse can be kept, a more comfortable growing environment is provided for crops in the greenhouse, the crop yield is further improved, the consumption of fossil energy can be reduced, the problems of environment and energy are greatly relieved, and the phase change energy storage material has great significance for the development of society and the construction of new rural areas.
Therefore, the targeted selection of the composite energy storage material capable of being applied to the greenhouse is particularly critical, the existing phase change material is usually calcium chloride hexahydrate, but the defects of supercooling, phase separation and the like exist, and the enthalpy change of the material is not large, so that the further improvement is needed.
Disclosure of Invention
The invention aims to provide calcium chloride hexahydrate composite phase change thermal insulation mortar, wherein a composite phase change material is added into the thermal insulation mortar, so that the thermal insulation performance of the mortar is greatly improved, a good living environment is provided for organisms in a greenhouse, the use of fossil fuels is reduced, energy is saved, and the ecological rural construction process is facilitated to be promoted.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the composite phase change thermal insulation mortar containing calcium chloride hexahydrate comprises mortar, and further comprises 5-30 wt% of a phase change energy storage material, wherein the phase change energy storage material comprises calcium chloride hexahydrate, strontium chloride hexahydrate and sodium carboxymethylcellulose, and the weight ratio of the calcium chloride hexahydrate: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85-99: 1-10: 1-5.
Preferably, the weight percentage of the phase change energy storage material is 20%, and the weight percentage of the calcium chloride hexahydrate: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 87:10:3 by weight.
Preferably, the phase change energy storage material is 30wt%, and the weight ratio of the calcium chloride hexahydrate: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85:10: 5.
Preferably, the phase change energy storage material is 5wt%, and the weight ratio of the calcium chloride hexahydrate: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 98:1:1 by weight.
In the technical scheme, a hydrated salt phase-change energy storage material is added into mortar, and calcium chloride hexahydrate with better performance is selected, so that heat energy converted from solar energy can be fully utilized and stored, the waste of energy is avoided, the consumption of fossil energy is reduced, and the environmental pollution is reduced; meanwhile, the temperature in the greenhouse can be kept stable, and a good and suitable living environment is provided for the organisms in the greenhouse. In order to solve the problem of large supercooling degree of the calcium chloride hexahydrate phase-change energy storage material, different types of nucleating agents and different proportions are respectively tested to obtain the best nucleating agent which is strontium chloride hexahydrate, when the mass proportion of the strontium chloride hexahydrate accounts for 10%, the supercooling degree of the strontium chloride hexahydrate can be reduced to 0.6 ℃ from 3.2 ℃, and the added thickening agent sodium carboxymethyl cellulose (CMC-Na) can solve the problem of phase separation and plays a role together with the strontium chloride hexahydrate, so that the calcium chloride hexahydrate phase-change energy storage material can be obviously improved in all aspects, and when the calcium chloride phase-change energy storage material is applied to a greenhouse, a good effect can be achieved.
Drawings
FIG. 1 is a plot of supercooling degree test for strontium chloride hexahydrate in nucleating agent example 1;
FIG. 2 is a DSC enthalpy result for a nucleating agent example 1 with a weight fraction of strontium chloride hexahydrate of 1%;
FIG. 3 is a DSC enthalpy result for a nucleating agent example 1 with a weight fraction of strontium chloride hexahydrate of 5%;
FIG. 4 is a DSC enthalpy result for a weight fraction of 10% strontium chloride hexahydrate of nucleating agent example 1;
FIG. 5 is an XRD analysis plot of 10% by weight strontium chloride hexahydrate of example nucleating agent 1;
FIG. 6 is a scanning electron microscope (magnified one thousand times) showing a nucleating agent example 1 with a weight fraction of strontium chloride hexahydrate of 10%;
FIG. 7 is a scanning electron microscope (at two thousand times magnification) showing a nucleating agent example 1 with a strontium chloride hexahydrate weight fraction of 10%;
FIG. 8 is a plot of supercooling degree test for sodium silicate hydrate of comparative example 1 of nucleating agent;
FIG. 9 is a DSC enthalpy result for 1% weight fraction of hydrated sodium silicate of comparative nucleating agent example 1;
FIG. 10 is a DSC enthalpy result for 5% weight fraction of hydrated sodium silicate of comparative example 1 of nucleating agent;
FIG. 11 is a DSC enthalpy result for 10% weight fraction of sodium silicate hydrate of comparative example 1 of nucleating agent;
FIG. 12 is an XRD analysis curve of nucleating agent comparative example 1 with a 10% weight fraction of sodium silicate hydrate;
FIG. 13 is a scanning electron microscope (magnified five hundred times) at 10% weight fraction of sodium silicate hydrate in comparative nucleating agent example 1;
FIG. 14 is a scanning electron microscope (two thousand times magnified) of nucleating agent comparative example 1 where the weight fraction of sodium silicate hydrate is 10%.
Detailed Description
The following description of the present invention will be made with reference to the accompanying drawings 1-14 and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The composite phase change thermal insulation mortar containing calcium chloride hexahydrate comprises mortar, wherein the weight percentage of phase change energy storage materials is 20 percent, and the weight percentage of the calcium chloride hexahydrate is as follows: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 87:10:3 by weight.
Example 2
The composite phase change thermal insulation mortar containing calcium chloride hexahydrate comprises mortar, wherein the weight percentage of phase change energy storage materials is 30 percent, and the weight percentage of the calcium chloride hexahydrate is as follows: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85:10: 5.
Example 3
The composite phase change thermal insulation mortar containing calcium chloride hexahydrate comprises mortar, wherein the weight percentage of phase change energy storage materials is 5 percent, and the weight percentage of the calcium chloride hexahydrate is as follows: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 98:1:1 by weight.
Effect of different nucleating agents on the Properties of phase Change energy storage materials
EXAMPLE 1 nucleating agent strontium chloride hexahydrate
Step 1, sample preparation: respectively taking three parts of calcium chloride hexahydrate with the mass of 10g under the constant temperature environment of 35 ℃, respectively adding 1%, 5% and 10% of nucleating agent strontium chloride hexahydrate into three groups of calcium chloride hexahydrate to form a mixture, uniformly stirring, standing the mixture, keeping the temperature until the temperature is stable, quickly transferring the mixture into a water bath environment at 20 ℃ for cooling, and preparing an experimental sample after cooling;
step 2: three groups of experimental samples are respectively taken to carry out supercooling degree test (temperature step cooling curve), DSC test is carried out to obtain the enthalpy change of the material, XRD analysis (XRD is a main method for researching the phase and the crystal structure of the material, different materials can generate diffraction phenomena with different degrees under the irradiation of X rays, the composition, the crystal type, the intramolecular bonding mode, the molecular configuration, the conformation and the like of the material determine the specific diffraction pattern generated by the material, if the material exists, the information such as the phase composition lattice parameter and the like of the material can be determined by referring to the standard PDF card contrast, if the material is a new synthetic material, the obtained diffraction pattern can be used for analyzing the information such as the material structure parameter and the like), SEM analysis (whether the crystal growth is inhibited or not is carried out)
The test results are shown in fig. 1 to 7.
Comparative example 1 nucleating agent hydrated sodium silicate
Step 1, sample preparation: respectively taking three parts of 10g calcium chloride hexahydrate in parts by weight under a constant temperature environment of 35 ℃, respectively adding 1%, 5% and 10% of nucleating agent sodium nonahydrate into three groups of calcium chloride hexahydrate to form a mixture, uniformly stirring, standing the mixture, keeping the temperature until the temperature is stable, quickly transferring the mixture to a water bath environment of 20 ℃ for cooling, and preparing an experimental sample after cooling;
step 2: three groups of experimental samples are respectively taken to carry out supercooling degree test (temperature step cooling curve), DSC test is carried out to obtain the enthalpy change of the material, and XRD analysis (XRD is a main method for researching the phase and the crystal structure of the material, different materials can generate diffraction phenomena with different degrees under the irradiation of X rays, the composition, the crystal type, the intramolecular bonding mode, the molecular configuration, the conformation and the like of the material determine the specific diffraction pattern generated by the material, if the material exists, the information such as the phase composition lattice parameter and the like of the material can be determined by referring to the standard PDF card contrast, if the material is a new synthetic material, the obtained diffraction pattern can be used for analyzing the information such as the material structure parameter and the like), and SEM analysis (whether the crystal growth is inhibited or not is carried out).
The test results are shown in fig. 8 to 14.
Comparative example 2 nucleating agent diatomaceous earth
Step 1, sample preparation: respectively taking three parts of calcium chloride hexahydrate with the mass of 10g, respectively adding 1 wt%, 5wt% and 10 wt% of nucleating agent diatomite into three groups of calcium chloride hexahydrate to form a mixture under the constant temperature environment of 35 ℃, uniformly stirring, standing the mixture, keeping the temperature until the temperature is stable, quickly transferring the mixture to a water bath environment at 20 ℃ for cooling, and preparing an experimental sample after cooling;
step 2: and respectively taking three groups of experimental samples, and carrying out supercooling degree test and DSC test to obtain the enthalpy change of the three groups of experimental samples.
Comparative example 3 nucleating agent bentonite
Step 1, sample preparation: respectively taking three parts of calcium chloride hexahydrate with the mass of 10g under the constant temperature environment of 35 ℃, respectively adding 1%, 5% and 10% of nucleating agent bentonite into three groups of calcium chloride hexahydrate to form a mixture, uniformly stirring, standing the mixture, keeping the temperature until the temperature is stable, quickly transferring the mixture to a water bath environment of 20 ℃ for cooling, and preparing an experimental sample after cooling;
step 2: and respectively taking three groups of experimental samples, and carrying out supercooling degree test and DSC test to obtain the enthalpy change of the three groups of experimental samples.
Comparative example 4 nucleating agent aluminum nitride
Step 1, sample preparation: respectively taking three parts of calcium chloride hexahydrate with the mass of 10g under the constant temperature environment of 35 ℃, respectively adding 1%, 5% and 10% of nucleating agent aluminum nitride into three groups of calcium chloride hexahydrate to form a mixture, uniformly stirring, standing the mixture, keeping the temperature until the temperature is stable, quickly transferring the mixture to a water bath environment of 20 ℃ for cooling, and preparing an experimental sample after cooling;
step 2: and respectively taking three groups of experimental samples, and carrying out supercooling degree test and DSC test to obtain the enthalpy change of the three groups of experimental samples.
The experimental results of example 1, comparative example 2, comparative example 3 and comparative example 4 are shown in table 1 below
TABLE 1
As can be seen from the results of Table 1 and the accompanying drawings, when the mass fraction of strontium chloride hexahydrate is 10%, the enthalpy value is 171J/g at most, and the supercooling degree is reduced to 0.6 ℃, and according to the results of electron microscopy, most of sodium silicate nonahydrate is adsorbed on the surface of calcium chloride hexahydrate, while the strontium chloride hexahydrate and the calcium chloride hexahydrate are well bonded together, XRD (X-ray diffraction) test results show that the two substances are not changed, namely physically mixed and do not undergo chemical reaction. Therefore, the strontium chloride hexahydrate is the optimal nucleating agent of the phase change energy storage material calcium chloride hexahydrate, the mass fraction of the strontium chloride hexahydrate is 10% and the CMC is 3, the problem that the supercooling degree of the phase change energy storage material calcium chloride hexahydrate is large can be better solved, the performance of the calcium chloride hexahydrate energy storage material is improved, and the calcium chloride hexahydrate is more suitable for being applied to greenhouses.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The composite phase-change thermal insulation mortar containing calcium chloride hexahydrate comprises mortar and is characterized by further comprising 5-30 wt% of a phase-change energy storage material, wherein the phase-change energy storage material comprises calcium chloride hexahydrate, strontium chloride hexahydrate and sodium carboxymethylcellulose, and the weight ratio of the calcium chloride hexahydrate to the weight ratio of the calcium chloride hexahydrate is as follows: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85-99: 1-10: 1-5.
2. The composite phase change thermal mortar containing calcium chloride hexahydrate according to claim 1, wherein the weight percent of the phase change energy storage material is 20%, and the weight percent of the calcium chloride hexahydrate is: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 87:10:3 by weight.
3. The composite phase change thermal mortar containing calcium chloride hexahydrate according to claim 1, wherein the weight percentage of the phase change energy storage material is 30%, and the weight percentage of the calcium chloride hexahydrate is: strontium chloride hexahydrate: the weight ratio of the sodium carboxymethylcellulose is 85:10: 5.
4. The composite phase change thermal mortar containing calcium chloride hexahydrate according to claim 1, wherein the weight percent of the phase change energy storage material is 5%, and the weight percent of the calcium chloride hexahydrate is: strontium chloride hexahydrate: the ratio of the sodium carboxymethylcellulose is 98:1:1 by weight.
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